Mitsubishi Electric EHPX Series Service manual

HYDROBOX
January 2013
No. OCH532
REVISED EDITION-A
SERVICE MANUAL
R410A
[Model name]
[Service Ref.]
EHSC-VM2B
EHSC-VM2B.UK
EHSC-VM6B.UK
EHSC-YM9B.UK
EHSC-TM9B.UK
EHSC-VM6EB.UK
EHSC-YM9EB.UK
EHPX-VM2B.UK
EHPX-VM6B.UK
EHPX-YM9B.UK
ERSC-VM2B.UK
EHSC-VM6B
EHSC-YM9B
EHSC-TM9B
EHSC-VM6EB
EHSC-YM9EB
EHPX-VM2B
EHPX-VM6B
EHPX-YM9B
ERSC-VM2B
Revision:
• EHSC-VM2B.UK
and EHSC-TM9B.UK
have been added in
REVISED EDITION-A.
• Some descriptions have
been modified.
• Please void OCH532.
Note:
• This manual describes
only service data of
Hydrobox.
• RoHS compliant products have <G> mark on
the spec name plate.
CONTENTS
1. REFERENCE MANUAL ................................... 2
2. SAFETY PRECAUTION................................... 3
3. SPECIFICATIONS ............................................ 6
4. PART NAMES AND FUNCTIONS .................. 7
5. OUTLINES AND DIMENSIONS ......................11
6. WIRING DIAGRAM ........................................ 13
7. FIELD WIRING ............................................... 24
8. WATER SYSTEM DIAGRAM ......................... 28
9. CONTROLS ................................................... 31
10. TROUBLESHOOTING ................................... 51
11. DISASSEMBLY PROCEDURE ...................... 68
12. SUPPLEMENTARY INFORMATION ............. 82
HYDROBOX
MAIN CONTROLLER
13. SERVICE AND MAINTENANCE ................... 83
PARTS CATALOG (OCB532)
1
REFERENCE MANUAL
OUTDOOR UNIT'S SERVICE MANUAL
Service Ref.
Service Manual No.
PUHZ-RP35/50/60/71VHA4
PUHZ-RP35/50/60/71VHA4R4
PUHZ-RP100/125/140VKA
OCH451
PUHZ-RP100/125/140YKA
PUHZ-RP100/125/140YKAR4
PUHZ-HRP71/100VHA
PUHZ-HRP71/100VHA2
PUHZ-HRP71/100VHA2R1
PUHZ-HRP100VHA2R2
OCH425
PUHZ-HRP100/125YHA
PUHZ-HRP100/125YHA2
PUHZ-HRP100/125YHA2R1
PUHZ-W50/85VHA(-BS)
PUHZ-W50/85VHAR1(-BS)
OCH439
PUHZ-W50VHAR2(-BS)
PUHZ-W85VHA2.UK
PUHZ-W85VHA2-BS.UK
OCH465
PUHZ-HW112/140YHA(-BS)
PUHZ-HW112/140YHA2(-BS)
PUHZ-HW112/140YHA2R1(-BS)
PUHZ-HW112/140YHA2R3(-BS)
PUHZ-HW140VHA(-BS)
OCH439
PUHZ-HW140VHA2(-BS)
PUHZ-HW140VHA2R1(-BS)
PUHZ-HW140VHA2R2-BS
PUHZ-HW140VHA2R3(-BS)
PUHZ-SW40/45VHA(-BS)
PUHZ-SW75/100/120VHA(-BS)
PUHZ-SW100/125YHA(-BS)
PUHZ-SHW80/112VHA
PUHZ-SWH112/140YHA
OCH532A
OCH525
OCH533
OCH526
2
2
SAFETY PRECAUTION
Please read the following safety precautions carefully.
WARNING:
Precautions that must be observed to prevent injuries or death.
CAUTION:
Precautions that must be observed to prevent damage to unit.
Mitsubishi Electric is not responsible for the failure of locally-supplied and field-supplied parts.
• Be sure to perform periodical maintenance.
• Be sure to follow your local regulations.
• Be sure to follow the instructions provided in this manual.
WARNING
Mechanical
The hydrobox and outdoor units must not be installed, disassembled, relocated, altered or repaired by the user. Ask an authorised installer or technician. If the
unit is installed improperly or modified after installation by the user water leakage, electric shock or fire may result.
The outdoor unit should be securely fixed to a hard level surface capable of bearing its weight.
The hydrobox should be positioned on a hard vertical surface capable of supporting its filled weight to prevent excessive sound or vibration.
Do not position furniture or electrical appliances below the outdoor unit or hydrobox.
The discharge pipework from the emergency/safety devices of the hydrobox should be installed according to local law.
Only use accessories and replacement parts authorised by Mitsubishi Electric ask a qualified technician to fit the parts.
Electrical
All electrical work should be performed by a qualified technician according to local regulations and the instructions given in this manual.
The units must be powered by a dedicated power supply and the correct voltage and circuit breakers must be used.
Wiring should be in accordance with national wiring regulations. Connections must be made securely and without tension on the terminals.
Earth unit correctly.
General
Keep children and pets away from both the hydrobox and outdoor units.
Do not use the hot water produced by the heat pump directly for drinking or cooking. This could cause illness to the user.
Do not stand on the units.
Do not touch switches with wet hands.
Annual maintenance checks on both the hydrobox and the outdoor unit should be done by qualified person.
Do not place contains with liquids in on top of the hydrobox. If they leak or spill onto the hydrobox damage to the unit and/or fire could occur.
Do not place any heavy items on top of the hydrobox.
When installing or relocating, or servicing the hydrobox, use only the specified refrigerant (R410A) to charge the refrigerant lines. Do not mix it with any other
refrigerant and do not allow air to remain in the lines. If air is mixed with the refrigerant, then it can be the cause of abnormal high pressure in the refrigerant
line, and may result in an explosion and other hazards.
The use of any refrigerant other than that specified for the system will cause mechanical failure or system malfunction or unit breakdown. In the worst case, this
could lead to a serious impediment to securing product safety.
In heating mode, to avoid the heat emitters being damaged by excessively hot water, set the target flow temperature to a minimum of 2ºC below the maximum
allowable temperature of all the heat emitters. For Zone2, set the target flow temperature to a minimum of 5ºC below the maximum allowable flow temperature
of all the heat emitters in Zone2 circuit.
CAUTION
Use clean water that meets local quality standards on the primary circuit.
The outdoor unit should be installed in an area with sufficient airflow according to the diagrams in the outdoor unit installation manual.
The hydrobox should be located inside to minimise heat loss.
Water pipe-runs on the primary circuit between outdoor and indoor unit should be kept to a minimum to reduce heat loss.
Ensure condensate from outdoor unit is piped away from the base to avoid puddles of water.
Remove as much air as possible from water circuit.
Refrigerant leakage may cause suffocation. Provide ventilation in accordance with EN378-1.
Be sure to wrap insulation around the piping. Direct contact with the bare piping may result in burns or frostbite.
Never put batteries in your mouth for any reason to avoid accidental ingestion.
Battery ingestion may cause choking and/or poisoning.
Install the unit on a rigid structure to prevent excessive sound or vibration during operation.
If power to the hydrobox is to be turned off (or system switched off) for a long time, the water should be drained.
Preventative measures should be taken against water hammer, such as installing a Water Hammer Arrestor on the primary water circuit, as directed by the manufacturer.
In order to prevent condensation on emitters, adjust flow temperature appropriately and also set the lower limit of the flow temperature on site.
OCH532A
3
WARNING (SPLIT MODELS ONLY)
Do not discharge refrigerant into the atmosphere if refrigerant leaks during installation, ventilate the room.
Use appropriate tools for high pressure refrigerant.
When pumping down refrigerant , stop the compressor before disconnecting the refrigerant pipes.
During installation securely fasten the refrigerant pipes before starting the compressor.
Check that refrigerant gas does not leak after the completion of installation.
Use R410A refrigerant only. Do not allow air to enter the lines. Failure to observe these instructions will cause mechanical failure, system failure or, in the worst
case, serious breach of product safety.
CAUTION (SPLIT MODELS ONLY)
<Using R410A refrigerant heat pumps>
Use C1220 copper phosphorus, for copper and copper alloy seamless pipes, to connect the refrigerant pipes. Make sure the insides of the pipes are clean and
do not contain any harmful contaminants such as sulfuric compounds, oxidants, debris, or dust. Use pipes with the specified thickness. (Refer to 4.4 in the installation manual.) Note the following if reusing existing pipes that carried R22 refrigerant.
- Replace the existing flare nuts and flare the flared sections again.
- Do not use thin pipes. (Refer to 4.4 in the installation manual.)
Store the pipes to be used during installation indoors and keep both ends of the pipes sealed until just before brazing. (Leave elbow joints, etc. in their packaging.) If dust, debris, or moisture enters the refrigerant lines, oil deterioration or compressor breakdown may result.
Use ester oil, ether oil, alkylbenzene oil (small amount) as the refrigeration oil applied to the flared sections. If mineral oil is mixed in the refrigeration oil, oil deterioration may result.
Do not use refrigerant other than R410A refrigerant. If another refrigerant is used, the chlorine will cause the oil to deteriorate.
Use the following tools specifically designed for use with R410A refrigerant. The following tools are necessary to use R410A refrigerant. Contact your nearest
dealer for any questions.
Tools (for R410A)
Gauge manifold
Charge hose
Gas leak detector
Torque wrench
Flare tool
Size adjustment gauge
Vacuum pump adapter
Electronic refrigerant charging scale
Be sure to use the correct tools. If dust, debris, or moisture enters the refrigerant lines, refrigeration oil deterioration may result.
Do not use a charging cylinder, a cylindrical measuring container, when charging R410A refrigerant gas. If the refrigerant gas is transferred to a charging cylinder,
the composition of the refrigerant will change and system efficiency will be reduced.
OCH532A
4
[1] Cautions for service
(1) Perform service after recovering the refrigerant left in unit completely.
(2) Do not release refrigerant in the air.
(3) After completing service, charge the cycle with specified amount of refrigerant.
(4) When performing service, install a filter drier simultaneously.
Be sure to use a filter drier for new refrigerant.
[2] Additional refrigerant charge
When charging directly from refrigerant cylinder
· Check that refrigerant cylinder for R410A on the market is syphon type.
· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
Unit
Gravimeter
[3] Service tools
Use the service tools below as exclusive tools for R410A refrigerant.
No.
Tool name
Specifications
· Only for R410A
1
Gauge manifold
· Use the existing fitting specifications. (UNF1/2)
· Use high-tension side pressure of 5.3 MPa·G or over.
· Only for R410A
2
Charge hose
3
Electronic scale
4
Gas leak detector
· Use the detector for R134a, R407C or R410A
5
Adaptor for reverse flow check
· Attach on vacuum pump.
6
Refrigerant charge base
7
Refrigerant cylinder
8
Refrigerant recovery equipment
OCH532A
· Use pressure performance of 5.09 MPa·G or over.
—
—
· Only for R410A
·Top of cylinder (Pink)
· Cylinder with syphon
—
5
OCH532A
Booster heater
Water circuit
(Primary)
6
2 kW
9A
16 A
2 kW + 4 kW
26 A
32 A
• Joint pipe (15.88 → 12.7)
• Joint pipe (9.52 → 6.35)
• Thermistor
• High temperature thermistor
Power supply
(Phase, voltage,
frequency)
Breaker
(*when powered from
independent source)
Power supply
(Phase, voltage,
frequency)
Capacity
Current
Breaker
Cooling
Heating
Cooling
Heating
Cooling
3 kW + 6 kW
23 A
32 A
PAC-SH50RJ-E
PAC-SH30RJ-E
PAC-TH011-E
PAC-TH011HT-E
10 - 30°C
25 - 60°C
2 kW + 4 kW
26 A
32 A
~/N, 230 V,
50 Hz
3~, 400 V,
50 Hz
3 kW + 6 kW
13 A
16 A
10 A
~/N, 230 V, 50 Hz
—
See outdoor unit spec table.
0 - 35°C (≤ 80%RH)
—
—
28 mm compression (Primary circuit)
3~, 230 V,
50 Hz
<Table 3.1>
3 kW + 6 kW
13 A
16 A
3~, 400 V,
50 Hz
15.88 mm
Gas
Heating
9.52 mm
Liquid
PAR-WT50R-E
PAR-WR51R-E
PAC-SE51TS-E
PAC-TH011TK-E
Booster heater
Control board
Outdoor temperature
Ambient *1
Room temperature
Flow temperature
Refrigerant
(R410A)
Water
Grundfos UPM2 25 70-180
90°C
121°C
~/N, 230 V,
50 Hz
0.3 MPa (3 bar)
55 kg
Min flow 5.5 L/min
Thermal cut-out (for dry run prevention)
• Wireless Remote Controller
• Wireless Receiver
• Remote sensor
• Tank thermistor (THW5)
Optional extras
Electrical data
Guaranteed operating
range
Target temperature range
Connections
1 - 80°C
0.1 MPa (1 bar)
NOT available
55 kg
-
59 kg
2 kW
9A
16 A
~/N, 230 V,
50 Hz
—
44 kg
EHSC-TM9B EHSC-VM6EB EHSC-YM9EB EHPX-VM2B
800×530×360 mm
53 kg
49 kg
49 kg
39 kg
10 L
59 kg
53 kg
EHSC-YM9B
Manual reset thermostat
Flow switch
Pressure relief valve
Primary circuit circulating pump
Safety
device
Control thermistor
Unvented expansion vessel Nominal volume
(Primary circuit)
Charge pressure
Cooling mode
~/N, 230 V,
50 Hz
57 kg
Plate heat exchanger
53 kg
51 kg
Weight (full)
59 kg
EHSC-VM6B
EHSC-VM2B
Model name
Overall unit dimensions (Height×Width×Depth)
Weight (empty)
10 L
—
46 kg
41 kg
EHPX-YM9B
3 kW + 6 kW
13 A
16 A
3~, 400 V,
50 Hz
2 kW
9A
16 A
~/N, 230 V,
50 Hz
See outdoor
unit spec table
(min. 10°C). *2
Not available
5 - 25°C
15.88 mm
9.52 mm
G1 (Male)
Available
60 kg
ERSC-VM2B
860×530×360 mm
54 kg
*2 Low ambient cooling is NOT allowed.
*1 The environment must be frost-free.
2 kW + 4 kW
26 A
32 A
~/N, 230 V,
50 Hz
—
—
0.1 MPa (1 bar)
—
46 kg
41 kg
EHPX-VM6B
3
SPECIFICATIONS
4
PART NAMES AND FUNCTIONS
<EHSC-*M*B> (Split model system)
Number
1
2
3
Figure 4-1
4
6
5
7
12
8
9
11
13
10
E
A
B
C
D
Figure 4-2
OCH532A
7
Component
1
Control and electrical box
2
Main controller
3
Manometer
4
Expansion vessel
5
Expansion vessel charge valve
6
Automatic air vent
7
Booster heater
8
Drain cock
9
Water circulation pump
10
Pressure relief valve
11
Flow switch
12
Plate heat exchanger
13
Strainer valve
A
Inlet from space heating/Indirect DHW tank (primary return)
B
Outlet to space heating/Indirect DHW tank
(primary flow)
C
Refrigerant (Liquid)
D
Refrigerant (Gas)
E
Discharge from pressure relief valve (installer to
pipe connect to suitable drain point)
<EHSC-*M*EB> (Split model system without expansion vessel)
Number
1
2
Component
1
Control and electrical box
2
Main controller
3
Manometer
6
Automatic air vent
7
Booster heater
8
Drain cock
9
Water circulation pump
10
Pressure relief valve
11
Flow switch
12
Plate heat exchanger
13
Strainer valve
A
Inlet from space heating/Indirect DHW tank (primary return)
B
Outlet to space heating/Indirect DHW tank
(primary flow)
C
Refrigerant (Liquid)
D
Refrigerant (Gas)
E
Discharge from pressure relief valve (installer to
pipe connect to suitable drain point)
3
Figure 4-3
6
12
7
8
9
11
13
10
E
A
B
C
D
Figure 4-4
*For installation of this model, make sure to install a primary-side expansion vessel in the field. (Refer to installation manual, Figure 4.3.3.)
OCH532A
8
<EHPX> (Packaged model system)
Number
1
2
3
Figure 4-5
4
6
5
7
8
9
11
10
13
E
A
B
C
D
Figure 4-6
OCH532A
9
Component
1
Control and electrical box
2
Main controller
3
Manometer
4
Expansion vessel
5
Expansion vessel charge valve
6
Automatic air vent
7
Booster heater
8
Drain cock
9
Water circulation pump
10
Pressure relief valve
11
Flow switch
13
Strainer valve
A
Inlet from space heating/Indirect DHW tank (primary return)
B
Inlet from heat pump
C
Outlet to heat pump
D
Outlet to space heating/Indirect DHW tank (primary
flow)
E
Discharge from pressure relief valve (installer to
pipe connect to suitable drain point)
<ERSC> (Split model system for heating and cooling)
Number
1
2
3
Figure 4-7
4
6
5
7
12
8
9
11
13
10
14
E
A
B
C
D
Figure 4-8
OCH532A
10
Component
1
Control and electrical box
2
Main controller
3
Manometer
4
Expansion vessel
5
Expansion vessel charge valve
6
Automatic air vent
7
Booster heater
8
Drain cock
9
Water circulation pump
10
Pressure relief valve
11
Flow switch
12
Plate heat exchanger
13
Strainer valve
14
Drain pan
A
Inlet from space heating/Indirect DHW tank (primary return)
B
Outlet to space heating/Indirect DHW tank
(primary flow)
C
Refrigerant (Liquid)
D
Refrigerant (Gas)
E
Discharge from pressure relief valve (installer to
pipe connect to suitable drain point)
5
OUTLINES AND DIMENSIONS
5-1. Technical Drawings
(Unit: mm)
<EHSC> (Split model system)
530
Automatic air vent
Earth leakage
circuit breaker
590
800
Terminal block
Pressure relief
valve
110.5
100.5
55.5
264.5
Main controller
㧔233)
<Front>
<Side>
Letter
F
Pipe description
Space heating/Indirect DHW
tank (primary) return connection
Space heating/Indirect DHW
tank (primary) flow connection
A
E
B
348
189
137
233
D
461
<View from below>
C
28 mm/Compression
Refrigerant (Liquid)
9.52 mm/Flare
Refrigerant (Gas)
15.88 mm/Flare
Discharge pipe (by installer) from
G1/2” female (valve port within hydrobox casing)
pressure relief valve
—
For inlets and , run low-voltage wires including
Electrical cable inlets
external input wires and thermistor wires. For inlets
and , run high-voltage wires including power
cable, indoor-outdoor cable, and external output
wires.
*For a wireless receiver (option) cable, use inlet .
86
124
163
227
326
381
28 mm/Compression
D
E
48
Connection size/type
C
96
282
253
357
A
<Rear>
F
B
<EHPX> (Packaged model system)
530
Automatic air vent
Earth leakage
circuit breaker
577
800
Terminal block
Pressure relief
valve
110.5
55.5
264.5
Main controller
㧔233)
<Side>
<Front>
E
F
A
Letter
348
233
77
56
282
253
189
137
B
Flow connection from heat pump 28 mm/Compression
Return connection to heat pump
E
D
163
227
461
C
F
<View from below>
OCH532A
Connection size/type
Space heating/Indirect DHW
28 mm/Compression
tank (primary) return connection
C
D
48
86
89
124
157
B
357
A
Pipe description
<Rear>
28 mm/Compression
Space heating/Indirect DHW
28 mm/Compression
tank (primary) flow connection
Discharge pipe (by installer)
G1/2” female (valve port within hydrobox casing)
from pressure relief valve
—
Electrical cable inlets
For inlets and , run low-voltage wires including
external input wires and thermistor wires. For inlets
and , run high-voltage wires including power
cable, indoor-outdoor cable, and external output
wires.
*For a wireless receiver (option) cable, use inlet .
11
<ERSC> (Split model system)
Automatic air vent
530
Earth leakage
circuit breaker
637
860
Terminal block
Pressure relief
valve
100.5
110
324.5
Main controller
(233)
E
Pipe description
Connection size/type
A
Space heating and cooling/
Indirect DHW tank (primary)
return connection
G1 nut
B
Space heating and cooling/
Indirect DHW tank (primary) flow G1 nut
connection
C
Refrigerant (Liquid)
9.52 mm/Flare
D
Refrigerant (Gas)
15.88 mm/Flare
E
Discharge pipe (by installer) from
G1/2” female (valve port within hydrobox casing)
pressure relief valve
124
84
233
348
A
Letter
357
F
48
133
223
308
365
D
461
G
B
<Rear>
<Right side>
<Front>
C
<View from below>
—
For inlets and , run low-voltage wires including
external input wires and thermistor wires. For inlets
and , run high-voltage wires including power
cable, indoor-outdoor cable, and external output
wires.
*For a wireless receiver (option) cable, use inlet .
Electrical cable inlets
F
G
Drain socket
O.D. ø20
5-2. Service access diagrams
a
Service access
Parameter
a
b
c
d
Dimension (mm)
200
150
500
500
b
b
Sufficient space MUST be left for the provision of discharge pipework as detailed
in National and Local building regulations.
d
c
The hydrobox must be located indoors and in a frost-free environment, for
example in a utility room.
Service access
OCH532A
12
6
WIRING DIAGRAM
6-1. EHSC-VM2B
Cylinder unit powered
by independent source.
Cylinder unit powered
via outdoor unit
Power supply
to Booster heater
~/N 230V 50Hz
To outdoor
unit
Power supply To outdoor
unit
~/N 230V 50Hz
3
M
1~
GRY
GRY
BHC1
1 3 5 A1
MP1
CNP1
(WHT)
1
3
M
1~
MP2
M
1~
2 4 6 A2
VLT
VLT
MP3
WHT/No.1
WHT/No.2
*1
Close
N
Open
M
1~
MXV
BHF
Signal
output
(Error)
2
Signal
output
(Defrost)
BHT
M
1~
2WV2
2
Signal 1
output
(Immersion 3
heater)
CNIH
Signal (ORN)
output
(Booster
heater2+)
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
X1
1
3
X3
5
X4
7
3
2 TBO.1
1
4
6
X5A
X5B
1
3
5
X11
7
X12
9
11
13
CN3C
(BLU)
1
CNV1
(WHT)
5
8
9
10
11
12
13
14
CN3C 1
(BLU) 3
FTC4
2
6
CN105
(RED)
8
10
12
1
14
3
CNPWM
(WHT)
CNRF
(WHT)
1
5
CNBH
(WHT)
3
3
1
CNBC
(GRY)
3
CNIH
(ORN)
1
CN108
CN22
(BLU)
CNBHT 1
(BLK) 2
1
SW4
CN2F CN20 CN21 CNW12 CNW5
(YLW) (RED) (YLW) (RED) (WHT)
1
1
1
1
1
2
3
2
3
4
5
2 4 6 8 10 12 14
7
1
1
LED1
1
SW2
1
2 4 6 8 10 12 14
1 3 5 7 9 11 13
3 5 7 9 11 13
TBI.1
3
CNBC
(GRY)
6
SW1
8 1
8
SW3
TBI.2
1
8
*1
TBI.1
3
t°
t°
THW9
t°
THW7
t°
THW6
t°
THW8
IN7
IN6
IN5
t°
THWB2
t°
2
Main
controller
1
IN4
t°
1 2 3 4 5 6 7 8 9 10 11 12 13 14
CN22
(BLU)
IN3
t°
IN1
t°
1
IN2
t°
2
4 1
6 7 8 9 10 11 12 13 14
CN2F
(YLW)
THW5
3 1
CNW5
(WHT)
CNW12
(RED)
2 1
TH1
1
THW2
2WV1
THW1
3WV
1~
CN21
(YLW)
M
1~
TH2
M
TBI.2
1 2 3 4 5
THWB1
2WV1
TBO.1 9 10 11
CN20
(RED)
3WV
TBO.1 9 10 11
Table 1 Signal Inputs
Name
IN1
IN2
IN3
IN4
IN5
IN6
IN7
Terminal block Connector
TBI.1 1-2
—
TBI.1 3-4
CN2F
TBI.1 5-6
—
—
TBI.1 7-8
—
TBI.1 9-10
TBI.1 11-12
—
—
TBI.1 13-14
Item
Room thermostat 1 input
Flow switch 1 input
Flow switch 2 input (Zone1)
Demand control input
Outdoor thermostat input *1
Room thermostat 2 input
Flow switch 3 input (Zone2)
OFF (Open)
ON (Short)
Refer to SW2-1 in <6-11 Dip switch setting>
Refer to SW2-2 in <6-11 Dip switch setting>
Refer to SW3-2 in <6-11 Dip switch setting>
Normal
Heat source OFF/Boiler operation *2
Standard operation
Heater operation/Boiler operation *2
Refer to SW3-1 in <6-11 Dip switch setting>
Refer to SW3-3 in <6-11 Dip switch setting>
*1. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and
related parts may be reduced.
*2. To turn on the boiler operation, use the main controller to select “Boiler” in “External/input setting“
screen in the service menu.
Table 2 Outputs
Name
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
OUT10
OUT11
OUT12
OUT13
Terminal block Connector
Item
TBO.1 3-4
CNP1
Water circulation pump 1 output (Space heating & DHW)
TBO.1 5-6
—
Water circulation pump 2 output (Space heating for Zone1)
TBO.1 7-8
—
Water circulation pump 3 output (Space heating for Zone2)
TBO.1 9-11
CNV1
3-way valve (2-way valve1) output
TBO.1 12-13
—
Mixing valve output
TBO.1 13-14
—
CNBH 1-3 Booster heater 1 output
—
CNBH 5-7 Booster heater 2 output
TBO.2 11-12
—
Booster heater 2+ output
TBO.2 9-10
CNIH
Immersion heater output
—
TBO.1 1-2
Boiler output
TBO.2 1-2
—
Error output
TBO.2 3-4
—
Defrost output
—
TBO.2 7-8
2-way valve 2 output
Symbol
TB1
ECB1
MP1
MP2
Name
Terminal block <Power supply, Outdoor unit>
Earth leakage circuit breaker for booster heater
Water circulation pump1(Space heating & DHW)
Water circulation pump2
(Space heating for Zone1)(Field supply)
MP3
Water circulation pump3
(Space heating for Zone2)(Field supply)
3WV(2WV1)
2WV2
MXV
BHT
BHF
BH1
BHC1
BHCP
3-way valve (2-way valve1)(Field supply)
2-way valve2 (Field supply)
Mixing valve (Field supply)
Thermostat for booster heater
Thermal fuse for booster heater
Booster heater 1
Contactor for booster heater 1
Contactor for booster heater protection
OCH532A
Symbol
TH1
TH2
THW1
THW2
THW5
THW6
THW7
THW8
THW9
THWB1
THWB2
IN1
IN2
IN3
IN4
IN5
IN6
IN7
YLW
ORN
RED
BLU
GRN/YLW
LED2
7
X7
YLW
ORN
1
5
LED4
X6
3
LED3
4
1
1
CN3C
(BLU)
1
BRN
BRN
ORN
Figure 1
X9
X8
BLK
ORN
3
S1 S2 S3 TB1
CN01
(BLK)
5
3
1
TBO.2
X13
CNBHT(BLK)
CNBH
(WHT)
3
2
1
L N
CN01
(BLK)
5
3
1
CN01 5
(BLK)
3
1
CNP1(WHT)
X2
S1 S2 S3 TB1
YLW
ORN
BLK
X10
1
3
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TBO.2
BH1
2
RED
BLU
CNPWM
(WHT)
1
TBO.1
D
RE
BLU
1
Wireless receiver
(Option)
RED
BLU
3
2 4 6 A2
L N
3
F2
1 3 5 A1
BHCP
CN01
(BLK)
5
F1
Signal
output
(Boiler)
GRN/YLW
2 4
YLW
ORN
ECB1
CIRCUIT
BREAKER
L N
(1) (3)
OFF
OFF
OFF
OFF
Heating
Stop
Stop
OFF
OFF
OFF
OFF
OFF
Normal
Normal
DHW
Name
Thermistor (Room temp.)(Option)
Thermistor (Ref. liquid temp.)
Thermistor (Flow water temp.)
Thermistor (Return water temp.)
Thermistor (DHW tank water temp.)(Option)
Thermistor (Zone1 flow temp.)(Option)
Thermistor (Zone1 return temp.)(Option)
Thermistor (Zone2 flow temp.)(Option)
Thermistor (Zone2 return temp.)(Option)
Thermistor (Boiler flow temp.)(Option)
Thermistor (Boiler return temp.)(Option)
Room thermostat 1 (Field supply)
Flow switch 1
Flow switch 2 (Field supply)
Demand control (Field supply)
Outdoor thermostat (Field supply)
Room thermostat 2 (Field supply)
Flow switch 3 (Field supply)
13
ON
ON
ON
ON
DHW
Close
Open
ON
ON
ON
ON
ON
Error
Defrost
Heating
FLOW TEMP. CONTROLLER (FTC4)
TBO.1~2 Terminal block <Outputs>
TBI.1~2 Terminal block <Signal Inputs, Thermistor>
F1~F2 Fuse (T6.3AL250V)
SW1~4 Dip switch *See 6-11 Dip switch setting
X1~X13 Relay
LED1 Power supply (FTC4)
LED2 Power supply (Main controller)
LED3 Communication (FTC4-Outdoor unit)
LED4 Reading or writing data to SD card
CNPWM Pump speed control signal for MP1
CN108 SD card connector
1. Symbols used in wiring diagram are,
: connector,
: terminal block.
2. Indoor unit and outdoor unit connecting wires
have polarities, make sure to match terminal numbers (S1, S2, S3) for correct wirings,
3. Since the outdoor unit side electric wiring may change, be sure to check the outdoor unit
electric wiring diagram for servicing.
4. This diagram shows the wiring of indoor unit and outdoor unit connecting wires
(specification of 230V), adopting superimposed system of power and signal.
When work to supply power separately to indoor unit and outdoor unit was applied, refer
to Figure 1.
6-2. EHSC-VM6B
Cylinder unit powered
by independent source.
Cylinder unit powered
via outdoor unit
Power supply
to Booster heater
~/N 230V 50Hz
To outdoor
unit
Power supply To outdoor
unit
~/N 230V 50Hz
TBO.1
BLU
RED
3
1 3 5 A1 BHC2
1~
GRY
GRY
M
BHC1
1 3 5 A1
MP1
CNP1
(WHT)
1
3
M
1~
MP2
1~
VLT
VLT
PNK
MP3
*1
BLU/No.3
BLU/No.4
WHT/No.1
WHT/No.2
M
PNK
2 4 6 A2
2 4 6 A2
Close
N
Open
M
1~
MXV
BHF
2
2
Signal
output
(Defrost)
BHT
Signal
output
(Error)
M
1~
2WV2
2
Signal 1
output
(Immersion 3
heater)
CNIH
Signal (ORN)
output
(Booster
heater2+)
2
2
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
BLK
X10
X1
1
3
X3
5
X4
7
9
11
X5A
13
X5B
1
3
5
X11
7
1
6
FTC4
12
6
CN105
(RED)
1
CNPWM
(WHT)
3
CNRF
(WHT)
3
7
1
1
CNBC
(GRY)
3
1
CNIH
(ORN)
1
5
CN108
CN22
(BLU)
CNBHT 1
(BLK) 2
SW4
CN2F CN20 CN21 CNW12 CNW5
(YLW) (RED) (YLW) (RED) (WHT)
1
1
1
1
1
2
3
2
3
4
7
1
LED1
6
1
6 8 10 12 14
SW1
8 1
8
SW3
1 3 5 7 9 11 13
3 5 7 9 11 13
TBI.1
3
CNBC
(GRY)
1
SW2
2 4
2 4 6 8 10 12 14
1
TBI.2
1
8
*1
1 2 3 4 5
CN22
(BLU)
3
1
t°
t°
t°
THW9
t°
THW7
t°
THW8
IN7
IN6
IN5
IN4
t°
THW6
t°
IN3
t°
1
IN2
t°
THW5
t°
THW2
t°
2
4 1
THW1
3 1
TH2
2 1
TH1
1
1 2 3 4 5 6 7 8 9 10 11 12 13 14
CN2F
(YLW)
THWB2
1~
6 7 8 9 10 11 12 13 14
2
Main
controller
CNW5
(WHT)
2WV1
CNW12
(RED)
3WV
CN21
(YLW)
M
1~
CN20
(RED)
M
TBI.2
TBI.1
THWB1
2WV1
TBO.1 9 10 11
IN1
3WV
TBO.1 9 10 11
Table 1 Signal Inputs
Name
IN1
IN2
IN3
IN4
IN5
IN6
IN7
Terminal block Connector
TBI.1 1-2
—
TBI.1 3-4
CN2F
—
TBI.1 5-6
—
TBI.1 7-8
TBI.1 9-10
—
TBI.1 11-12
—
TBI.1 13-14
—
Item
Room thermostat 1 input
Flow switch 1 input
Flow switch 2 input (Zone1)
Demand control input
Outdoor thermostat input *1
Room thermostat 2 input
Flow switch 3 input (Zone2)
OFF (Open)
ON (Short)
Refer to SW2-1 in <6-11 Dip switch setting>
Refer to SW2-2 in <6-11 Dip switch setting>
Refer to SW3-2 in <6-11 Dip switch setting>
Normal
Heat source OFF/Boiler operation *2
Standard operation
Heater operation/Boiler operation *2
Refer to SW3-1 in <6-11 Dip switch setting>
Refer to SW3-3 in <6-11 Dip switch setting>
*1. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and
related parts may be reduced.
*2. To turn on the boiler operation, use the main controller to select “Boiler” in “External/input setting“
screen in the service menu.
Table 2 Outputs
Name
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
OUT10
OUT11
OUT12
OUT13
Terminal block Connector
Item
TBO.1 3-4
CNP1
Water circulation pump 1 output (Space heating & DHW)
TBO.1 5-6
—
Water circulation pump 2 output (Space heating for Zone1)
TBO.1 7-8
—
Water circulation pump 3 output (Space heating for Zone2)
TBO.1 9-11
CNV1
3-way valve (2-way valve1) output
TBO.1 12-13
—
Mixing valve output
TBO.1 13-14
—
CNBH 1-3 Booster heater 1 output
—
CNBH 5-7 Booster heater 2 output
TBO.2 11-12
—
Booster heater 2+ output
TBO.2 9-10
CNIH
Immersion heater output
TBO.1 1-2
—
Boiler output
TBO.2 1-2
—
Error output
TBO.2 3-4
—
Defrost output
TBO.2 7-8
—
2-way valve 2 output
Symbol
TB1
ECB1
MP1
MP2
Name
Terminal block <Power supply, Outdoor unit>
Earth leakage circuit breaker for booster heater
Water circulation pump1(Space heating & DHW)
Water circulation pump2
(Space heating for Zone1)(Field supply)
MP3
Water circulation pump3
(Space heating for Zone2)(Field supply)
3WV(2WV1)
2WV2
MXV
BHT
BHF
BH1
BH2
BHC1
BHC2
BHCP
3-way valve (2-way valve1)(Field supply)
2-way valve2 (Field supply)
Mixing valve (Field supply)
Thermostat for booster heater
Thermal fuse for booster heater
Booster heater 1
Booster heater 2
Contactor for booster heater 1
Contactor for booster heater 2
Contactor for booster heater protection
OCH532A
Symbol
TH1
TH2
THW1
THW2
THW5
THW6
THW7
THW8
THW9
THWB1
THWB2
IN1
IN2
IN3
IN4
IN5
IN6
IN7
YLW
ORN
RED
BLU
GRN/YLW
1
5
LED4
5
YLW
ORN
LED3
4
LED2
3
BRN
ORN
Figure 1
CNBH
(WHT)
X7
3
TBO.2
2
1
X6
CN3C
(BLU)
1
BRN
ORN
3
S1 S2 S3 TB1
CN01
(BLK)
5
3
1
14
X9
X8
1
3
CN3C 1
(BLU) 3
X13
CNBHT(BLK)
CNBH
(WHT)
CN3C
(BLU)
1
CNV1
(WHT)
5
8
10
8
9
10
11
12
13
14
X12
3
2 TBO.1
1
4
L N
BLK
CN01
(BLK)
5
3
1
CN01 5
(BLK)
3
1
CNP1(WHT)
X2
1
3
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TBO.2
BH1 BH2
2
RED
BLU
CNPWM
(WHT)
1
S1 S2 S3 TB1
YLW
ORN
D
RE
BLU
1
Wireless receiver
(Option)
RED
BLU
3
2 4 6 A2
L N
3
F2
1 3 5 A1
BHCP
CN01
(BLK)
5
F1
Signal
output
(Boiler)
GRN/YLW
2 4
YLW
ORN
ECB1
CIRCUIT
BREAKER
L N
(1) (3)
OFF
OFF
OFF
OFF
Heating
Stop
Stop
OFF
OFF
OFF
OFF
OFF
Normal
Normal
DHW
Name
Thermistor (Room temp.)(Option)
Thermistor (Ref. liquid temp.)
Thermistor (Flow water temp.)
Thermistor (Return water temp.)
Thermistor (DHW tank water temp.)(Option)
Thermistor (Zone1 flow temp.)(Option)
Thermistor (Zone1 return temp.)(Option)
Thermistor (Zone2 flow temp.)(Option)
Thermistor (Zone2 return temp.)(Option)
Thermistor (Boiler flow temp.)(Option)
Thermistor (Boiler return temp.)(Option)
Room thermostat 1 (Field supply)
Flow switch 1
Flow switch 2 (Field supply)
Demand control (Field supply)
Outdoor thermostat (Field supply)
Room thermostat 2 (Field supply)
Flow switch 3 (Field supply)
14
ON
ON
ON
ON
DHW
Close
Open
ON
ON
ON
ON
ON
Error
Defrost
Heating
FLOW TEMP. CONTROLLER (FTC4)
TBO.1~2 Terminal block <Outputs>
TBI.1~2 Terminal block <Signal Inputs, Thermistor>
F1~F2 Fuse (T6.3AL250V)
SW1~4 Dip switch *See 6-11 Dip switch setting
X1~X12 Relay
LED1 Power supply (FTC4)
LED2 Power supply (Main controller)
LED3 Communication (FTC4-Outdoor unit)
LED4 Reading or writing data to SD card
CNPWM Pump speed control signal for MP1
CN108 SD card connector
1. Symbols used in wiring diagram are,
: connector,
: terminal block.
2. Indoor unit and outdoor unit connecting wires
have polarities, make sure to match terminal numbers
(S1, S2, S3) for correct wirings,
3. Since the outdoor unit side electric wiring may change,
be sure to check the outdoor unit electric wiring
diagram for servicing.
4. This diagram shows the wiring of indoor unit and
outdoor unit connecting wires (specification of 230V),
adopting superimposed system of power and signal.
When work to supply power separately to indoor
unit and outdoor unit was applied, refer to Figure 1.
6-3. EHSC-YM9B
Cylinder unit powered
by independent source.
Cylinder unit powered
via outdoor unit
Power supply
to Booster heater
3~ 400V 50Hz
To outdoor
unit
Power supply To outdoor
unit
~/N 230V 50Hz
RED
WHT
BLK
M
1 3 5 A1 BHC2
1~
GRY
GRY
BHC1
CNP1
(WHT)
1
3
MP1
M
1~
MP2
1~
VLT
VLT
PNK
MP3
*1
BLU/No.4
BLU/No.5
BLU/No.6
WHT/No.1
WHT/No.2
WHT/No.3
M
PNK
2 4 6 A2
2 4 6 A2
Close
N
Open
M
1~
MXV
2
BH1
BHF
2
TBO.2
2
BH2
BHT
Signal
output
(Defrost)
Signal
output
(Error)
M
1~
2WV2
2
Signal 1
output
(Immersion 3
heater)
CNIH
Signal (ORN)
output
(Booster
heater2+)
2
2
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
X1
1
3
X3
5
X4
7
1
6
X5A
X5B
1
5
X11
7
X12
9
11
13
FTC4
4
6
CN105
(RED)
8
10
12
1
14
3
CNPWM
(WHT)
CNRF
(WHT)
1
5
LED4
3
7
1
CNBC
(GRY)
3
1
1
CNIH
(ORN)
CN108
CN22
(BLU)
CNBHT 1
(BLK) 2
SW4
CN2F CN20 CN21 CNW12 CNW5
(YLW) (RED) (YLW) (RED) (WHT)
1
1
1
1
1
2
3
2
3
4
5
2 4 6 8 10 12 14
7
1
1
LED1
1
SW2
1
6 8 10 12 14
2 4
3 5 7 9 11 13
6
SW1
8 1
8
SW3
1 3 5 7 9 11 13
TBI.1
3
CNBC
(GRY)
TBI.2
1
8
*1
TBI.1
CN22
(BLU)
3
1
t°
t°
t°
THW9
t°
THW7
t°
THW8
IN7
IN6
IN5
IN4
t°
THW6
t°
IN3
t°
1
IN2
t°
THW5
t°
2
4 1
THW2
t°
TH2
3 1
THW1
2 1
TH1
1
1 2 3 4 5 6 7 8 9 10 11 12 13 14
CN2F
(YLW)
THWB2
1~
6 7 8 9 10 11 12 13 14
2
Main
controller
CNW5
(WHT)
2WV1
CNW12
(RED)
3WV
CN21
(YLW)
M
1~
CN20
(RED)
M
TBI.2
1 2 3 4 5
THWB1
2WV1
TBO.1 9 10 11
IN1
3WV
TBO.1 9 10 11
Table 1 Signal Inputs
Name
IN1
IN2
IN3
IN4
IN5
IN6
IN7
Terminal block Connector
TBI.1 1-2
—
TBI.1 3-4
CN2F
—
TBI.1 5-6
TBI.1 7-8
—
TBI.1 9-10
—
TBI.1 11-12
—
TBI.1 13-14
—
Item
Room thermostat 1 input
Flow switch 1 input
Flow switch 2 input (Zone1)
Demand control input
Outdoor thermostat input *1
Room thermostat 2 input
Flow switch 3 input (Zone2)
OFF (Open)
ON (Short)
Refer to SW2-1 in <6-11 Dip switch setting>
Refer to SW2-2 in <6-11 Dip switch setting>
Refer to SW3-2 in <6-11 Dip switch setting>
Normal
Heat source OFF/Boiler operation *2
Standard operation
Heater operation/Boiler operation *2
Refer to SW3-1 in <6-11 Dip switch setting>
Refer to SW3-3 in <6-11 Dip switch setting>
*1. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and
related parts may be reduced.
*2. To turn on the boiler operation, use the main controller to select “Boiler” in “External/input setting“
screen in the service menu.
Table 2 Outputs
Name
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
OUT10
OUT11
OUT12
OUT13
Terminal block Connector
Item
TBO.1 3-4
CNP1
Water circulation pump 1 output (Space heating & DHW)
TBO.1 5-6
—
Water circulation pump 2 output (Space heating for Zone1)
TBO.1 7-8
—
Water circulation pump 3 output (Space heating for Zone2)
TBO.1 9-11
CNV1
3-way valve (2-way valve1) output
TBO.1 12-13
—
Mixing valve output
TBO.1 13-14
—
CNBH 1-3 Booster heater 1 output
—
CNBH 5-7 Booster heater 2 output
TBO.2 11-12
—
Booster heater 2+ output
TBO.2 9-10
CNIH
Immersion heater output
TBO.1 1-2
—
Boiler output
TBO.2 1-2
—
Error output
TBO.2 3-4
—
Defrost output
TBO.2 7-8
—
2-way valve 2 output
Symbol
TB1
ECB1
MP1
MP2
Name
Terminal block <Power supply, Outdoor unit>
Earth leakage circuit breaker for booster heater
Water circulation pump1(Space heating & DHW)
Water circulation pump2
(Space heating for Zone1)(Field supply)
MP3
Water circulation pump3
(Space heating for Zone2)(Field supply)
3WV(2WV1)
2WV2
MXV
BHT
BHF
BH1
BH2
BHC1
BHC2
BHCP
3-way valve (2-way valve1)(Field supply)
2-way valve2 (Field supply)
Mixing valve (Field supply)
Thermostat for booster heater
Thermal fuse for booster heater
Booster heater 1
Booster heater 2
Contactor for booster heater 1
Contactor for booster heater 2
Contactor for booster heater protection
OCH532A
Symbol
TH1
TH2
THW1
THW2
THW5
THW6
THW7
THW8
THW9
THWB1
THWB2
IN1
IN2
IN3
IN4
IN5
IN6
IN7
YLW
ORN
YLW
ORN
RED
BLU
GRN/YLW
1
5
LED2
3
BRN
ORN
Figure 1
CNBH
(WHT)
X7
3
LED3
1
X6
CN3C
(BLU)
1
BRN
ORN
3
S1 S2 S3 TB1
CN01
(BLK)
5
3
1
TBO.2
2
X9
X8
1
3
CN3C 1
(BLU) 3
X13
CNBHT(BLK)
CNBH
(WHT)
CN3C
(BLU)
1
CNV1
(WHT)
5
8
9
10
11
12
13
14
3
3
2 TBO.1
1
4
L N
BLK
CN01
(BLK)
5
3
1
CN01 5
(BLK)
3
1
CNP1(WHT)
X2
YLW
ORN
RED
BLU
BLK
X10
1
3
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
S1 S2 S3 TB1
Wireless receiver
(Option)
RED
WHT
BLK
TBO.1
3
1 3 5 A1
1
CNPWM
(WHT)
1
3
2 4 6 A2
D
RE T
WH K
BL
L N
3
F2
1 3 5 A1
BHCP
CN01
(BLK)
5
F1
Signal
output
(Boiler)
GRN/YLW
2 4 6
YLW
ORN
ECB1
CIRCUIT
BREAKER
L1 L2 L3
(1) (3) (5)
OFF
OFF
OFF
OFF
Heating
Stop
Stop
OFF
OFF
OFF
OFF
OFF
Normal
Normal
DHW
Name
Thermistor (Room temp.)(Option)
Thermistor (Ref. liquid temp.)
Thermistor (Flow water temp.)
Thermistor (Return water temp.)
Thermistor (DHW tank water temp.)(Option)
Thermistor (Zone1 flow temp.)(Option)
Thermistor (Zone1 return temp.)(Option)
Thermistor (Zone2 flow temp.)(Option)
Thermistor (Zone2 return temp.)(Option)
Thermistor (Boiler flow temp.)(Option)
Thermistor (Boiler return temp.)(Option)
Room thermostat 1 (Field supply)
Flow switch 1
Flow switch 2 (Field supply)
Demand control (Field supply)
Outdoor thermostat (Field supply)
Room thermostat 2 (Field supply)
Flow switch 3 (Field supply)
15
ON
ON
ON
ON
DHW
Close
Open
ON
ON
ON
ON
ON
Error
Defrost
Heating
FLOW TEMP. CONTROLLER (FTC4)
TBO.1~2 Terminal block <Outputs>
TBI.1~2 Terminal block <Signal Inputs, Thermistor>
F1~F2 Fuse (T6.3AL250V)
SW1~4 Dip switch *See 6-11 Dip switch setting
X1~X12 Relay
LED1 Power supply (FTC4)
LED2 Power supply (Main controller)
LED3 Communication (FTC4-Outdoor unit)
LED4 Reading or writing data to SD card
CNPWM Pump speed control signal for MP1
CN108 SD card connector
1. Symbols used in wiring diagram are,
: connector,
: terminal block.
2. Indoor unit and outdoor unit connecting wires
have polarities, make sure to match terminal numbers
(S1, S2, S3) for correct wirings,
3. Since the outdoor unit side electric wiring may change,
be sure to check the outdoor unit electric wiring
diagram for servicing.
4. This diagram shows the wiring of indoor unit and
outdoor unit connecting wires (specification of 230V),
adopting superimposed system of power and signal.
When work to supply power separately to indoor
unit and outdoor unit was applied, refer to Figure 1.
6-4. EHSC-TM9B
Cylinder unit powered
by independent source.
Cylinder unit powered
via outdoor unit
Power supply
to Booster heater
3~ 230V 50Hz
To outdoor
unit
Power supply To outdoor
unit
~/N 230V 50Hz
RED
WHT
BLK
M
1 3 5 A1 BHC2
1~
GRY
GRY
BHC1
MP1
CNP1
(WHT)
1
3
M
1~
MP2
1~
VLT
VLT
PNK
MP3
*1
BLU/No.4
BLU/No.5
BLU/No.6
WHT/No.1
WHT/No.2
WHT/No.3
PNK
2 4 6 A2
2 4 6 A2
M
Close
N
Open
M
1~
MXV
2
BH1
2
TBO.2
2
Signal
output
(Defrost)
BH2
BHF
BHT
Signal
output
(Error)
M
1~
2WV2
2
Signal 1
output
(Immersion 3
heater)
CNIH
Signal (ORN)
output
(Booster
heater2+)
2
2
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
BLK
1
3
X3
5
7
X4
1
3
2 TBO.1
1
4
6
X5A
1
X5B
3
5
X11
7
9
X12
11
13
CN3C
(BLU)
1
CNV1
(WHT)
5
8
9
10
11
12
13
14
CN3C 1
(BLU) 3
FTC4
3
6
CN105
(RED)
8
10
12
1
14
3
CNPWM
(WHT)
CNRF
(WHT)
1
5
CNBH
(WHT)
3
7
1
CNBC
(GRY)
1
3
1
CNIH
(ORN)
CN108
CN22
(BLU)
CNBHT 1
(BLK) 2
SW4
CN2F CN20 CN21 CNW12 CNW5
(YLW) (RED) (YLW) (RED) (WHT)
1
1
1
1
1
2
3
2
3
4
2 4 6 8 10 12 14
5
1
7
LED1
SW2
TBI.1
1
1
2 4 6 8 10 12 14
1 3 5 7 9 11 13
3 5 7 9 11 13
1
6
SW1
8 1
8
SW3
TBI.2
1
8
3
CNBC
(GRY)
TBI.1
2WV1
1
t°
THW9
t°
THW7
t°
THW6
t°
THWB2
t°
THW8
IN7
t°
THWB1
t°
IN6
t°
3
IN5
t°
1
IN4
t°
1 2 3 4 5 6 7 8 9 10 11 12 13 14
CN22
(BLU)
IN3
t°
2
4 1
IN1
3 1
6 7 8 9 10 11 12 13 14
CN2F
(YLW)
IN2
2 1
CNW5
(WHT)
CNW12
(RED)
1
TH1
1~
THW5
2WV1
1~
THW1
3WV
TH2
M
CN21
(YLW)
CN20
(RED)
M
TBI.2
1 2 3 4 5
TBO.1 9 10 11
THW2
3WV
Table 1 Signal Inputs
Name
IN1
IN2
IN3
IN4
IN5
IN6
IN7
Terminal block Connector
TBI.1 1-2
—
TBI.1 3-4
CN2F
TBI.1 5-6
—
TBI.1 7-8
—
—
TBI.1 9-10
TBI.1 11-12
—
TBI.1 13-14
—
Item
Room thermostat 1 input
Flow switch 1 input
Flow switch 2 input (Zone1)
Demand control input
Outdoor thermostat input *1
Room thermostat 2 input
Flow switch 3 input (Zone2)
OFF (Open)
ON (Short)
Refer to SW2-1 in <6-11 Dip switch setting>
Refer to SW2-2 in <6-11 Dip switch setting>
Refer to SW3-2 in <6-11 Dip switch setting>
Normal
Heat source OFF/Boiler operation *2
Standard operation
Heater operation/Boiler operation *2
Refer to SW3-1 in <6-11 Dip switch setting>
Refer to SW3-3 in <6-11 Dip switch setting>
*1. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and
related parts may be reduced.
*2. To turn on the boiler operation, use the main controller to select “Boiler” in “External/input setting“
screen in the service menu.
Table 2 Outputs
Name
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
OUT10
OUT11
OUT12
OUT13
Terminal block Connector
Item
TBO.1 3-4
CNP1
Water circulation pump 1 output (Space heating & DHW)
TBO.1 5-6
—
Water circulation pump 2 output (Space heating for Zone1)
TBO.1 7-8
—
Water circulation pump 3 output (Space heating for Zone2)
TBO.1 9-11
CNV1
3-way valve (2-way valve1) output
TBO.1 12-13
—
Mixing valve output
TBO.1 13-14
—
CNBH 1-3 Booster heater 1 output
—
CNBH 5-7 Booster heater 2 output
TBO.2 11-12
—
Booster heater 2+ output
TBO.2 9-10
CNIH
Immersion heater output
—
TBO.1 1-2
Boiler output
TBO.2 1-2
—
Error output
TBO.2 3-4
—
Defrost output
—
TBO.2 7-8
2-way valve 2 output
Symbol
TB1
ECB1
MP1
MP2
Name
Terminal block <Power supply, Outdoor unit>
Earth leakage circuit breaker for booster heater
Water circulation pump1(Space heating & DHW)
Water circulation pump2
(Space heating for Zone1)(Field supply)
MP3
Water circulation pump3
(Space heating for Zone2)(Field supply)
3WV(2WV1)
2WV2
MXV
BHT
BHF
BH1
BH2
BHC1
BHC2
BHCP
3-way valve (2-way valve1)(Field supply)
2-way valve2 (Field supply)
Mixing valve (Field supply)
Thermostat for booster heater
Thermal fuse for booster heater
Booster heater 1
Booster heater 2
Contactor for booster heater 1
Contactor for booster heater 2
Contactor for booster heater protection
OCH532A
Symbol
TH1
TH2
THW1
THW2
THW5
THW6
THW7
THW8
THW9
THWB1
THWB2
IN1
IN2
IN3
IN4
IN5
IN6
IN7
OFF
OFF
OFF
OFF
Heating
Stop
Stop
OFF
OFF
OFF
OFF
OFF
Normal
Normal
DHW
Name
Thermistor (Room temp.)(Option)
Thermistor (Ref. liquid temp.)
Thermistor (Flow water temp.)
Thermistor (Return water temp.)
Thermistor (DHW tank water temp.)(Option)
Thermistor (Zone1 flow temp.)(Option)
Thermistor (Zone1 return temp.)(Option)
Thermistor (Zone2 flow temp.)(Option)
Thermistor (Zone2 return temp.)(Option)
Thermistor (Boiler flow temp.)(Option)
Thermistor (Boiler return temp.)(Option)
Room thermostat 1 (Field supply)
Flow switch 1
Flow switch 2 (Field supply)
Demand control (Field supply)
Outdoor thermostat (Field supply)
Room thermostat 2 (Field supply)
Flow switch 3 (Field supply)
ON
ON
ON
ON
DHW
Close
Open
ON
ON
ON
ON
ON
Error
Defrost
Heating
FLOW TEMP. CONTROLLER (FTC4)
TBO.1~2 Terminal block <Outputs>
TBI.1~2 Terminal block <Signal Inputs, Thermistor>
F1~F2 Fuse (T6.3AL250V)
SW1~4 Dip switch *See 6-11 Dip switch setting
X1~X13 Relay
LED1 Power supply (FTC4)
LED2 Power supply (Main controller)
LED3 Communication (FTC4-Outdoor unit)
LED4 Reading or writing data to SD card
CNPWM Pump speed control signal for MP1
CN108 SD card connector
1. Symbols used in wiring diagram are,
: connector,
: terminal block.
2. Indoor unit and outdoor unit connecting wires
have polarities, make sure to match terminal numbers (S1, S2, S3) for correct wirings,
3. Since the outdoor unit side electric wiring may change, be sure to check the outdoor unit
electric wiring diagram for servicing.
4. This diagram shows the wiring of indoor unit and outdoor unit connecting wires
(specification of 230V), adopting superimposed system of power and signal.
When work to supply power separately to indoor unit and outdoor unit was applied, refer
to Figure 1.
16
2
Main
controller
*1
TBO.1 9 10 11
YLW
ORN
RED
BLU
GRN/YLW
1
5
LED2
1
X8
X7
3
LED3
4
LED4
X6
CN3C
(BLU)
1
BRN
ORN
BRN
ORN
Figure 1
X9
1
CN01
(BLK)
5
3
1
TBO.2
2
X13
3
3
BLK
CN01
(BLK)
5
3
1
CN01 5
(BLK)
3
1
CNP1(WHT)
X1
X2
CNBHT(BLK)
CNBH
(WHT)
S1 S2 S3 TB1
X10
1
3
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
L N
YLW
ORN
TBO.1
3
1 3 5 A1
1
YLW
ORN
F2
CNPWM
(WHT)
1
S1 S2 S3 TB1
YLW
ORN
3
2 4 6 A2
D
RE T
WH LK
B
L N
3
Wireless receiver
(Option)
RED
WHT
BLK
Signal
output
(Boiler)
1 3 5 A1
BHCP
CN01
(BLK)
5
F1
GRN/YLW
2 4 6
RED
BLU
ECB1
CIRCUIT
BREAKER
L1 L2 L3
(1) (3) (5)
6-5. EHSC-VM6EB
Cylinder unit powered
by independent source.
Cylinder unit powered
via outdoor unit
Power supply
to Booster heater
~/N 230V 50Hz
To outdoor
unit
Power supply To outdoor
unit
~/N 230V 50Hz
BLU
RED
CNP1
(WHT)
1
1 3 5 A1 BHC2
1~
GRY
BHC1
GRY
M
3
MP1
M
1~
MP2
1~
VLT
VLT
PNK
MP3
*1
BLU/No.3
BLU/No.4
WHT/No.1
WHT/No.2
M
PNK
2 4 6 A2
2 4 6 A2
Close
N
Open
M
1~
MXV
TBO.2
BH1 BH2
2
BHF
2
2
Signal
output
(Defrost)
BHT
Signal
output
(Error)
M
1~
2WV2
2
Signal 1
output
(Immersion 3
heater)
CNIH
Signal (ORN)
output
(Booster
heater2+)
2
2
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
X1
X2
1
3
X3
5
X4
7
9
11
X5A
13
X5B
1
3
5
X11
7
X12
9
11
13
1
6
CN3C 1
(BLU) 3
FTC4
12
4
6
CN105
(RED)
8
10
12
1
14
3
CNPWM
(WHT)
CNRF
(WHT)
1
5
LED4
3
7
1
CNBC
(GRY)
3
1
1
CNIH
(ORN)
CN108
CN22
(BLU)
CNBHT 1
(BLK) 2
SW4
CN2F CN20 CN21 CNW12 CNW5
(YLW) (RED) (YLW) (RED) (WHT)
1
1
1
1
1
2
3
2
3
4
X7
5
2 4 6 8 10 12 14
7
LED1
1
6
SW1
8 1
8
SW3
1 3 5 7 9 11 13
TBI.1
3
CNBC
(GRY)
1
SW2
2 4 6 8 10 12 14
3 5 7 9 11 13
1
1
TBI.2
1
8
*1
3WV
2WV1
TBI.1
2WV1
CNW5
(WHT)
3WV
6 7 8 9 10 11 12 13 14
1 2 3 4 5 6 7 8 9 10 11 12 13 14
CN22
(BLU)
CN2F
(YLW)
1~
t°
THW9
t°
THW7
t°
THW6
t°
THWB2
t°
THW8
IN7
IN6
IN5
IN4
t°
THWB1
t°
2
Main
controller
1
IN3
t°
3
IN2
t°
1
IN1
t°
THW5
t°
2
4 1
THW2
3 1
THW1
2 1
TH1
1
TH2
1~
CNW12
(RED)
M
CN20
(RED)
M
TBI.2
1 2 3 4 5
TBO.1 9 10 11
CN21
(YLW)
TBO.1 9 10 11
Table 1 Signal Inputs
Name
IN1
IN2
IN3
IN4
IN5
IN6
IN7
Terminal block Connector
TBI.1 1-2
—
TBI.1 3-4
CN2F
—
TBI.1 5-6
TBI.1 7-8
—
TBI.1 9-10
—
TBI.1 11-12
—
—
TBI.1 13-14
Item
Room thermostat 1 input
Flow switch 1 input
Flow switch 2 input (Zone1)
Demand control input
Outdoor thermostat input *1
Room thermostat 2 input
Flow switch 3 input (Zone2)
OFF (Open)
ON (Short)
Refer to SW2-1 in <6-11 Dip switch setting>
Refer to SW2-2 in <6-11 Dip switch setting>
Refer to SW3-2 in <6-11 Dip switch setting>
Normal
Heat source OFF/Boiler operation *2
Standard operation
Heater operation/Boiler operation *2
Refer to SW3-1 in <6-11 Dip switch setting>
Refer to SW3-3 in <6-11 Dip switch setting>
*1. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and
related parts may be reduced.
*2. To turn on the boiler operation, use the main controller to select “Boiler” in “External/input setting“
screen in the service menu.
Table 2 Outputs
Name
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
OUT10
OUT11
OUT12
OUT13
Terminal block Connector
Item
TBO.1 3-4
CNP1
Water circulation pump 1 output (Space heating & DHW)
TBO.1 5-6
—
Water circulation pump 2 output (Space heating for Zone1)
TBO.1 7-8
—
Water circulation pump 3 output (Space heating for Zone2)
TBO.1 9-11
CNV1
3-way valve (2-way valve1) output
TBO.1 12-13
—
Mixing valve output
TBO.1 13-14
—
CNBH 1-3 Booster heater 1 output
—
CNBH 5-7 Booster heater 2 output
TBO.2 11-12
—
Booster heater 2+ output
TBO.2 9-10
CNIH
Immersion heater output
TBO.1 1-2
—
Boiler output
TBO.2 1-2
—
Error output
TBO.2 3-4
—
Defrost output
TBO.2 7-8
—
2-way valve 2 output
Symbol
TB1
ECB1
MP1
MP2
Name
Terminal block <Power supply, Outdoor unit>
Earth leakage circuit breaker for booster heater
Water circulation pump1(Space heating & DHW)
Water circulation pump2
(Space heating for Zone1)(Field supply)
MP3
Water circulation pump3
(Space heating for Zone2)(Field supply)
3WV(2WV1)
2WV2
MXV
BHT
BHF
BH1
BH2
BHC1
BHC2
BHCP
3-way valve (2-way valve1)(Field supply)
2-way valve2 (Field supply)
Mixing valve (Field supply)
Thermostat for booster heater
Thermal fuse for booster heater
Booster heater 1
Booster heater 2
Contactor for booster heater 1
Contactor for booster heater 2
Contactor for booster heater protection
OCH532A
Symbol
TH1
TH2
THW1
THW2
THW5
THW6
THW7
THW8
THW9
THWB1
THWB2
IN1
IN2
IN3
IN4
IN5
IN6
IN7
YLW
ORN
YLW
ORN
RED
BLU
GRN/YLW
1
5
LED2
3
BRN
ORN
Figure 1
LED3
CNBH
(WHT)
X6
3
TBO.2
2
1
X8
CN3C
(BLU)
1
BRN
ORN
3
S1 S2 S3 TB1
CN01
(BLK)
5
3
1
14
X9
1
3
CN3C
(BLU)
1
CNV1
(WHT)
5
8
10
X13
CNBHT(BLK)
CNBH
(WHT)
3
2 TBO.1
1
4
L N
BLK
CN01
(BLK)
5
3
1
CN01 5
(BLK)
3
1
CNP1(WHT)
YLW
ORN
RED
BLU
BLK
X10
1
3
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
S1 S2 S3 TB1
Wireless receiver
(Option)
RED
BLU
TBO.1
3
1 3 5 A1
1
CNPWM
(WHT)
1
3
2 4 6 A2
D
RE
BLU
L N
3
F2
1 3 5 A1
BHCP
CN01
(BLK)
5
F1
Signal
output
(Boiler)
GRN/YLW
2 4
YLW
ORN
ECB1
CIRCUIT
BREAKER
L N
(1) (3)
OFF
OFF
OFF
OFF
Heating
Stop
Stop
OFF
OFF
OFF
OFF
OFF
Normal
Normal
DHW
ON
ON
ON
ON
DHW
Close
Open
ON
ON
ON
ON
ON
Error
Defrost
Heating
Name
FLOW TEMP. CONTROLLER (FTC4)
Thermistor (Room temp.)(Option)
TBO.1~2 Terminal block <Outputs>
Thermistor (Ref. liquid temp.)
TBI.1~2 Terminal block <Signal Inputs, Thermistor>
Thermistor (Flow water temp.)
F1~F2 Fuse (T6.3AL250V)
Thermistor (Return water temp.)
SW1~4 Dip switch *See 6-11 Dip switch setting
Thermistor (DHW tank water temp.)(Option)
X1~X12 Relay
Thermistor (Zone1 flow temp.)(Option)
LED1 Power supply (FTC4)
Thermistor (Zone1 return temp.)(Option)
LED2 Power supply (Main controller)
Thermistor (Zone2 flow temp.)(Option)
LED3 Communication (FTC4-Outdoor unit)
Thermistor (Zone2 return temp.)(Option)
LED4 Reading or writing data to SD card
Thermistor (Boiler flow temp.)(Option)
CNPWM Pump speed control signal for MP1
Thermistor (Boiler return temp.)(Option)
CN108 SD card connector
Room thermostat 1 (Field supply)
1. Symbols used in wiring diagram are,
Flow switch 1
: connector,
: terminal block.
2. Indoor unit and outdoor unit connecting wires
Flow switch 2 (Field supply)
have polarities, make sure to match terminal numbers
Demand control (Field supply)
(S1, S2, S3) for correct wirings,
Outdoor thermostat (Field supply)
3. Since the outdoor unit side electric wiring may change,
Room thermostat 2 (Field supply)
be sure to check the outdoor unit electric wiring
diagram for servicing.
Flow switch 3 (Field supply)
4. This diagram shows the wiring of indoor unit and
outdoor unit connecting wires (specification of 230V),
adopting superimposed system of power and signal.
When work to supply power separately to indoor
unit and outdoor unit was applied, refer to Figure 1.
17
6-6. EHSC-YM9EB
Cylinder unit powered
by independent source.
Cylinder unit powered
via outdoor unit
Power supply
to Booster heater
3~ 400V 50Hz
To outdoor
unit
Power supply To outdoor
unit
~/N 230V 50Hz
1~
GRY
GRY
M
1 3 5 A1 BHC2
MP1
CNP1
(WHT)
1
3
M
1~
MP2
1~
VLT
VLT
PNK
MP3
*1
BLU/No.4
BLU/No.5
BLU/No.6
WHT/No.1
WHT/No.2
WHT/No.3
M
PNK
2 4 6 A2
2 4 6 A2
Close
N
Open
M
1~
MXV
2
BH1
BHF
2
TBO.2
2
BH2
BHT
Signal
output
(Defrost)
Signal
output
(Error)
M
1~
2WV2
2
Signal 1
output
(Immersion 3
heater)
CNIH
Signal
output
(Booster
heater2+)
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
(ORN)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
X1
1
3
X3
5
X4
7
9
11
X5A
13
X5B
1
3
5
X11
7
X12
9
11
13
2
CN3C 1
(BLU) 3
FTC4
12
4
6
CN105
(RED)
8
10
12
1
14
3
CNPWM
(WHT)
CNRF
(WHT)
3
7
CNIH
(ORN)
1
CNBC
(GRY)
1
5
3
1
SW4
2 4 6 8 10 12 14
7
LED1
SW2
6
SW1
8 1
8
SW3
1 3 5 7 9 11 13
TBI.1
3
CNBC
(GRY)
1
1
2 4 6 8 10 12 14
3 5 7 9 11 13
1
TBI.2
1
8
*1
TBI.1
3
Table 1 Signal Inputs
Name
IN1
IN2
IN3
IN4
IN5
IN6
IN7
Terminal block Connector
TBI.1 1-2
—
TBI.1 3-4
CN2F
—
TBI.1 5-6
—
TBI.1 7-8
TBI.1 9-10
—
TBI.1 11-12
—
—
TBI.1 13-14
Item
Room thermostat 1 input
Flow switch 1 input
Flow switch 2 input (Zone1)
Demand control input
Outdoor thermostat input *1
Room thermostat 2 input
Flow switch 3 input (Zone2)
t°
t°
THW9
t°
THW7
t°
THW6
t°
THW8
IN7
IN6
IN5
t°
THWB2
t°
2
Main
controller
1
IN4
t°
1 2 3 4 5 6 7 8 9 10 11 12 13 14
CN22
(BLU)
IN3
t°
1
IN2
t°
6 7 8 9 10 11 12 13 14
CN2F
(YLW)
2
4 1
THW5
t°
CNW5
(WHT)
CNW12
(RED)
3 1
THW2
2 1
TH1
1
THW1
2WV1
1~
CN21
(YLW)
3WV
1~
TH2
M
CN20
(RED)
M
TBI.2
1 2 3 4 5
THWB1
2WV1
TBO.1 9 10 11
IN1
3WV
TBO.1 9 10 11
OFF (Open)
ON (Short)
Refer to SW2-1 in <6-11 Dip switch setting>
Refer to SW2-2 in <6-11 Dip switch setting>
Refer to SW3-2 in <6-11 Dip switch setting>
Normal
Heat source OFF/Boiler operation *2
Standard operation
Heater operation/Boiler operation *2
Refer to SW3-1 in <6-11 Dip switch setting>
Refer to SW3-3 in <6-11 Dip switch setting>
*1. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and
related parts may be reduced.
*2. To turn on the boiler operation, use the main controller to select “Boiler” in “External/input setting“
screen in the service menu.
Table 2 Outputs
Name
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
OUT10
OUT11
OUT12
OUT13
Terminal block Connector
Item
TBO.1 3-4
CNP1
Water circulation pump 1 output (Space heating & DHW)
TBO.1 5-6
—
Water circulation pump 2 output (Space heating for Zone1)
TBO.1 7-8
—
Water circulation pump 3 output (Space heating for Zone2)
TBO.1 9-11
CNV1
3-way valve (2-way valve1) output
TBO.1 12-13
—
Mixing valve output
TBO.1 13-14
—
CNBH 1-3 Booster heater 1 output
—
CNBH 5-7 Booster heater 2 output
TBO.2 11-12
—
Booster heater 2+ output
TBO.2 9-10
CNIH
Immersion heater output
TBO.1 1-2
—
Boiler output
TBO.2 1-2
—
Error output
TBO.2 3-4
—
Defrost output
TBO.2 7-8
—
2-way valve 2 output
Symbol
TB1
ECB1
MP1
MP2
Name
Terminal block <Power supply, Outdoor unit>
Earth leakage circuit breaker for booster heater
Water circulation pump1(Space heating & DHW)
Water circulation pump2
(Space heating for Zone1)(Field supply)
MP3
Water circulation pump3
(Space heating for Zone2)(Field supply)
3WV(2WV1)
2WV2
MXV
BHT
BHF
BH1
BH2
BHC1
BHC2
BHCP
3-way valve (2-way valve1)(Field supply)
2-way valve2 (Field supply)
Mixing valve (Field supply)
Thermostat for booster heater
Thermal fuse for booster heater
Booster heater 1
Booster heater 2
Contactor for booster heater 1
Contactor for booster heater 2
Contactor for booster heater protection
OCH532A
Symbol
TH1
TH2
THW1
THW2
THW5
THW6
THW7
THW8
THW9
THWB1
THWB2
IN1
IN2
IN3
IN4
IN5
IN6
IN7
YLW
ORN
RED
BLU
GRN/YLW
CN108
CN22
(BLU)
CNBHT 1
(BLK) 2
CN2F CN20 CN21 CNW12 CNW5
(YLW) (RED) (YLW) (RED) (WHT)
1
1
1
1
1
2
3
2
3
4
1
YLW
ORN
1
5
LED2
1
BRN
ORN
Figure 1
LED4
5
3
LED3
CNBH
(WHT)
X7
CN3C
(BLU)
1
BRN
ORN
3
TBO.2
2
1
X6
CN01
(BLK)
5
3
1
14
X9
X8
1
3
CN3C
(BLU)
1
CNV1
(WHT)
5
8
10
CNBHT(BLK)
CNBH
(WHT)
3
X13
3
2
6
1
3
2
1
2 TBO.1
1
4
S1 S2 S3 TB1
BLK
CN01
(BLK)
5
3
1
CN01 5
(BLK)
3
1
CNP1(WHT)
X2
L N
YLW
ORN
BLK
X10
S1 S2 S3 TB1
YLW
ORN
TBO.1
RED
WHT
BLK
BHC1
1 3 5 A1
RED
BLU
CNPWM
(WHT)
1
3
D
RE T
WH K
BL
1
Wireless receiver
(Option)
RED
WHT
BLK
3
2 4 6 A2
L N
3
F2
1 3 5 A1
BHCP
CN01
(BLK)
5
F1
Signal
output
(Boiler)
GRN/YLW
2 4 6
CIRCUIT
BREAKER
L1 L2 L3
(1) (3) (5)
ECB1
OFF
OFF
OFF
OFF
Heating
Stop
Stop
OFF
OFF
OFF
OFF
OFF
Normal
Normal
DHW
Name
Thermistor (Room temp.)(Option)
Thermistor (Ref. liquid temp.)
Thermistor (Flow water temp.)
Thermistor (Return water temp.)
Thermistor (DHW tank water temp.)(Option)
Thermistor (Zone1 flow temp.)(Option)
Thermistor (Zone1 return temp.)(Option)
Thermistor (Zone2 flow temp.)(Option)
Thermistor (Zone2 return temp.)(Option)
Thermistor (Boiler flow temp.)(Option)
Thermistor (Boiler return temp.)(Option)
Room thermostat 1 (Field supply)
Flow switch 1
Flow switch 2 (Field supply)
Demand control (Field supply)
Outdoor thermostat (Field supply)
Room thermostat 2 (Field supply)
Flow switch 3 (Field supply)
ON
ON
ON
ON
DHW
Close
Open
ON
ON
ON
ON
ON
Error
Defrost
Heating
FLOW TEMP. CONTROLLER (FTC4)
TBO.1~2 Terminal block <Outputs>
TBI.1~2 Terminal block <Signal Inputs, Thermistor>
F1~F2 Fuse (T6.3AL250V)
SW1~4 Dip switch *See 6-11 Dip switch setting
X1~X12 Relay
LED1 Power supply (FTC4)
LED2 Power supply (Main controller)
LED3 Communication (FTC4-Outdoor unit)
LED4 Reading or writing data to SD card
CNPWM Pump speed control signal for MP1
CN108 SD card connector
1. Symbols used in wiring diagram are,
: connector,
: terminal block.
2. Indoor unit and outdoor unit connecting wires
have polarities, make sure to match terminal numbers
(S1, S2, S3) for correct wirings,
3. Since the outdoor unit side electric wiring may change,
be sure to check the outdoor unit electric wiring
diagram for servicing.
4. This diagram shows the wiring of indoor unit and
outdoor unit connecting wires (specification of 230V),
adopting superimposed system of power and signal.
When work to supply power separately to indoor
unit and outdoor unit was applied, refer to Figure 1.
18
6-7. EHPX-VM2B
Cylinder unit powered
by independent source.
Cylinder unit powered
via outdoor unit
Power supply
to Booster heater
~/N 230V 50Hz
To outdoor
unit
Power supply To outdoor
unit
~/N 230V 50Hz
3
M
1~
GRY
GRY
BHC1
1 3 5 A1
MP1
CNP1
(WHT)
1
3
M
1~
MP2
M
1~
2 4 6 A2
VLT
VLT
MP3
WHT/No.1
WHT/No.2
*1
Close
N
Open
M
1~
MXV
2
2
Signal
output
(Defrost)
BHT
Signal
output
(Error)
M
1~
2WV2
2
Signal 1
output
(Immersion 3
heater)
CNIH
Signal (ORN)
output
(Booster
heater2+)
2
1
3
X3
5
X4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
7
6
X5A
X5B
1
3
5
X11
6
CN105
(RED)
1
CNPWM
(WHT)
3
CNRF
(WHT)
1
5
1
5
LED4
LED2
3
7
3
1
CNBC
(GRY)
3
1
1
CNIH
(ORN)
CN108
CN22
(BLU)
CNBHT 1
(BLK) 2
SW4
CN2F CN20 CN21 CNW12 CNW5
(YLW) (RED) (YLW) (RED) (WHT)
1
1
1
1
1
2
3
2
3
4
X6
X7
5
2 4 6 8 10 12 14
7
1
1
LED1
1
SW2
1
2 4 6 8 10 12 14
6
SW1
8 1
8
SW3
1 3 5 7 9 11 13
3 5 7 9 11 13
TBI.1
3
CNBC
(GRY)
TBI.2
1
8
*1
3WV
2WV1
TBI.1
CNW5
(WHT)
M
2WV1
6 7 8 9 10 11 12 13 14
1 2 3 4 5 6 7 8 9 10 11 12 13 14
CN22
(BLU)
CN2F
(YLW)
1~
3
t°
THW9
t°
THW7
t°
THW6
t°
THWB2
t°
THW8
IN7
IN6
IN5
IN4
IN3
IN2
IN1
t°
2
Main
controller
1
t°
THW5
t°
1
THWB1
2
4 1
t°
TH1
t°
1
THW2
2
1
THW1
1~
CNW12
(RED)
M
3WV
TBI.2
1 2 3 4 5
TBO.1 9 10 11
CN20
(RED)
TBO.1 9 10 11
Table 1 Signal Inputs
Name
IN1
IN2
IN3
IN4
IN5
IN6
IN7
Terminal block Connector
TBI.1 1-2
—
TBI.1 3-4
CN2F
—
TBI.1 5-6
TBI.1 7-8
—
TBI.1 9-10
—
TBI.1 11-12
—
TBI.1 13-14
—
Item
Room thermostat 1 input
Flow switch 1 input
Flow switch 2 input (Zone1)
Demand control input
Outdoor thermostat input *1
Room thermostat 2 input
Flow switch 3 input (Zone2)
OFF (Open)
ON (Short)
Refer to SW2-1 in <6-11 Dip switch setting>
Refer to SW2-2 in <6-11 Dip switch setting>
Refer to SW3-2 in <6-11 Dip switch setting>
Normal
Heat source OFF/Boiler operation *2
Standard operation
Heater operation/Boiler operation *2
Refer to SW3-1 in <6-11 Dip switch setting>
Refer to SW3-3 in <6-11 Dip switch setting>
*1. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and
related parts may be reduced.
*2. To turn on the boiler operation, use the main controller to select “Boiler” in “External/input setting“
screen in the service menu.
Table 2 Outputs
Name
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
OUT10
OUT11
OUT12
OUT13
Terminal block Connector
Item
TBO.1 3-4
CNP1
Water circulation pump 1 output (Space heating & DHW)
TBO.1 5-6
—
Water circulation pump 2 output (Space heating for Zone1)
TBO.1 7-8
—
Water circulation pump 3 output (Space heating for Zone2)
TBO.1 9-11
CNV1
3-way valve (2-way valve1) output
TBO.1 12-13
—
Mixing valve output
TBO.1 13-14
—
CNBH 1-3 Booster heater 1 output
—
CNBH 5-7 Booster heater 2 output
TBO.2 11-12
—
Booster heater 2+ output
TBO.2 9-10
CNIH
Immersion heater output
TBO.1 1-2
—
Boiler output
TBO.2 1-2
—
Error output
TBO.2 3-4
—
Defrost output
TBO.2 7-8
—
2-way valve 2 output
Symbol
TB1
ECB1
MP1
MP2
Name
Terminal block <Power supply, Outdoor unit>
Earth leakage circuit breaker for booster heater
Water circulation pump1(Space heating & DHW)
Water circulation pump2
(Space heating for Zone1)(Field supply)
MP3
Water circulation pump3
(Space heating for Zone2)(Field supply)
3WV(2WV1)
2WV2
MXV
BHT
BHF
BH1
BHC1
BHCP
3-way valve (2-way valve1)(Field supply)
2-way valve2 (Field supply)
Mixing valve (Field supply)
Thermostat for booster heater
Thermal fuse for booster heater
Booster heater 1
Contactor for booster heater 1
Contactor for booster heater protection
OCH532A
Symbol
TH1
THW1
THW2
THW5
THW6
THW7
THW8
THW9
THWB1
THWB2
IN1
IN2
IN3
IN4
IN5
IN6
IN7
YLW
ORN
YLW
ORN
RED
BLU
GRN/YLW
LED3
4
CNBH
(WHT)
1
3
BRN
ORN
Figure 1
1
CNBHT(BLK)
CN3C
(BLU)
1
BRN
ORN
3
S1 S2 S3 TB1
CN01
(BLK)
5
3
1
TBO.2
2
X9
X8
YLW
ORN
RED
BLU
CN3C 1
(BLU) 3
X13
CNBH
(WHT)
CN3C
(BLU)
1
CNV1
(WHT)
FTC4
8
9
10
11
12
13
14
X12
3
5
8
9
10
11
12
13
14
7
3
2
1
2 TBO.1
1
4
L N
BLK
CN01
(BLK)
5
3
1
CN01 5
(BLK)
3
1
CNP1(WHT)
X2
1
3
2
BLK
X10
X1
TBO.2
BH1
BHF
1
2
3
4
5
6
7
8
9
10
11
12
13
14
S1 S2 S3 TB1
YLW
ORN
CNPWM
(WHT)
1
TBO.1
D
RE
BLU
1
Wireless receiver
(Option)
RED
BLU
3
2 4 6 A2
L N
3
F2
1 3 5 A1
BHCP
CN01
(BLK)
5
F1
Signal
output
(Boiler)
GRN/YLW
2 4
CIRCUIT
BREAKER
L N
(1) (3)
ECB1
OFF
OFF
OFF
OFF
Heating
Stop
Stop
OFF
OFF
OFF
OFF
OFF
Normal
Normal
DHW
Name
Thermistor (Room temp.)(Option)
Thermistor (Flow water temp.)
Thermistor (Return water temp.)
Thermistor (DHW tank water temp.)(Option)
Thermistor (Zone1 flow temp.)(Option)
Thermistor (Zone1 return temp.)(Option)
Thermistor (Zone2 flow temp.)(Option)
Thermistor (Zone2 return temp.)(Option)
Thermistor (Boiler flow temp.)(Option)
Thermistor (Boiler return temp.)(Option)
Room thermostat 1 (Field supply)
Flow switch 1
Flow switch 2 (Field supply)
Demand control (Field supply)
Outdoor thermostat (Field supply)
Room thermostat 2 (Field supply)
Flow switch 3 (Field supply)
19
ON
ON
ON
ON
DHW
Close
Open
ON
ON
ON
ON
ON
Error
Defrost
Heating
FLOW TEMP. CONTROLLER (FTC4)
TBO.1~2 Terminal block <Outputs>
TBI.1~2
F1~F2
SW1~4
X1~X12
LED1
LED2
LED3
LED4
CNPWM
CN108
Terminal block <Signal Inputs, Thermistor>
Fuse (T6.3AL250V)
Dip switch *See 6-11 Dip switch setting
Relay
Power supply (FTC4)
Power supply (Main controller)
Communication (FTC4-Outdoor unit)
Reading or writing data to SD card
Pump speed control signal for MP1
SD card connector
1. Symbols used in wiring diagram are,
: connector,
: terminal block.
2. Indoor unit and outdoor unit connecting wires
have polarities, make sure to match terminal numbers
(S1, S2, S3) for correct wirings,
3. Since the outdoor unit side electric wiring may change,
be sure to check the outdoor unit electric wiring
diagram for servicing.
4. This diagram shows the wiring of indoor unit and
outdoor unit connecting wires (specification of 230V),
adopting superimposed system of power and signal.
When work to supply power separately to indoor
unit and outdoor unit was applied, refer to Figure 1.
6-8. EHPX-VM6B
Cylinder unit powered
by independent source.
Cylinder unit powered
via outdoor unit
Power supply
to Booster heater
~/N 230V 50Hz
To outdoor
unit
Power supply To outdoor
unit
~/N 230V 50Hz
TBO.1
BLU
RED
3
1 3 5 A1 BHC2
1~
GRY
GRY
M
BHC1
1 3 5 A1
MP1
CNP1
(WHT)
1
3
M
1~
MP2
1~
VLT
VLT
PNK
MP3
*1
BLU/No.3
BLU/No.4
WHT/No.1
WHT/No.2
M
PNK
2 4 6 A2
2 4 6 A2
Close
N
Open
M
1~
MXV
BHF
2
2
Signal
output
(Defrost)
BHT
Signal
output
(Error)
M
1~
2WV2
2
Signal 1
output
(Immersion 3
heater)
CNIH
Signal (ORN)
output
(Booster
heater2+)
2
2
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
BLK
X10
X1
1
3
X3
5
X4
7
1
4
1
6
5
X5A
8
9
10
11
12
13
14
X5B
1
3
5
X11
7
6
CN105
(RED)
1
CNPWM
(WHT)
3
CNRF
(WHT)
1
5
LED2
3
7
3
1
CNBC
(GRY)
3
CNIH
(ORN)
1
CN108
CN22
(BLU)
CNBHT 1
(BLK) 2
1
SW4
CN2F CN20 CN21 CNW12 CNW5
(YLW) (RED) (YLW) (RED) (WHT)
1
1
1
1
1
2
3
2
3
4
2 4 6 8 10 12 14
7
1
1
LED1
1
SW2
1
2 4 6 8 10 12 14
6
SW1
8 1
8
SW3
1 3 5 7 9 11 13
3 5 7 9 11 13
TBI.1
3
CNBC
(GRY)
TBI.2
1
8
*1
3WV
2WV1
TBI.1
3WV
2WV1
CNW5
(WHT)
M
6 7 8 9 10 11 12 13 14
1 2 3 4 5 6 7 8 9 10 11 12 13 14
CN22
(BLU)
CN2F
(YLW)
1~
3
t°
THW9
t°
THW7
t°
THW6
t°
THWB2
t°
THW8
IN7
IN6
IN5
IN4
IN3
IN2
IN1
t°
2
Main
controller
1
t°
THW5
t°
1
THWB1
2
4 1
t°
TH1
t°
1
THW2
2
1
THW1
1~
CNW12
(RED)
M
TBI.2
1 2 3 4 5
TBO.1 9 10 11
CN20
(RED)
TBO.1 9 10 11
Table 1 Signal Inputs
Name
IN1
IN2
IN3
IN4
IN5
IN6
IN7
Terminal block Connector
TBI.1 1-2
—
TBI.1 3-4
CN2F
—
TBI.1 5-6
TBI.1 7-8
—
TBI.1 9-10
—
TBI.1 11-12
—
TBI.1 13-14
—
Item
Room thermostat 1 input
Flow switch 1 input
Flow switch 2 input (Zone1)
Demand control input
Outdoor thermostat input *1
Room thermostat 2 input
Flow switch 3 input (Zone2)
OFF (Open)
ON (Short)
Refer to SW2-1 in <6-11 Dip switch setting>
Refer to SW2-2 in <6-11 Dip switch setting>
Refer to SW3-2 in <6-11 Dip switch setting>
Normal
Heat source OFF/Boiler operation *2
Standard operation
Heater operation/Boiler operation *2
Refer to SW3-1 in <6-11 Dip switch setting>
Refer to SW3-3 in <6-11 Dip switch setting>
*1. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and
related parts may be reduced.
*2. To turn on the boiler operation, use the main controller to select “Boiler” in “External/input setting“
screen in the service menu.
Table 2 Outputs
Name
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
OUT10
OUT11
OUT12
OUT13
Terminal block Connector
Item
TBO.1 3-4
CNP1
Water circulation pump 1 output (Space heating & DHW)
TBO.1 5-6
—
Water circulation pump 2 output (Space heating for Zone1)
TBO.1 7-8
—
Water circulation pump 3 output (Space heating for Zone2)
TBO.1 9-11
CNV1
3-way valve (2-way valve1) output
TBO.1 12-13
—
Mixing valve output
TBO.1 13-14
—
CNBH 1-3 Booster heater 1 output
—
CNBH 5-7 Booster heater 2 output
TBO.2 11-12
—
Booster heater 2+ output
TBO.2 9-10
CNIH
Immersion heater output
TBO.1 1-2
—
Boiler output
TBO.2 1-2
—
Error output
TBO.2 3-4
—
Defrost output
TBO.2 7-8
—
2-way valve 2 output
Symbol
TB1
ECB1
MP1
MP2
Name
Terminal block <Power supply, Outdoor unit>
Earth leakage circuit breaker for booster heater
Water circulation pump1(Space heating & DHW)
Water circulation pump2
(Space heating for Zone1)(Field supply)
MP3
Water circulation pump3
(Space heating for Zone2)(Field supply)
3WV(2WV1)
2WV2
MXV
BHT
BHF
BH1
BH2
BHC1
BHC2
BHCP
3-way valve (2-way valve1)(Field supply)
2-way valve2 (Field supply)
Mixing valve (Field supply)
Thermostat for booster heater
Thermal fuse for booster heater
Booster heater 1
Booster heater 2
Contactor for booster heater 1
Contactor for booster heater 2
Contactor for booster heater protection
OCH532A
Symbol
TH1
THW1
THW2
THW5
THW6
THW7
THW8
THW9
THWB1
THWB2
IN1
IN2
IN3
IN4
IN5
IN6
IN7
YLW
ORN
RED
BLU
GRN/YLW
1
5
LED4
5
YLW
ORN
LED3
4
CNBH
(WHT)
X7
3
BRN
ORN
Figure 1
1
X6
CN3C
(BLU)
1
BRN
ORN
3
S1 S2 S3 TB1
CN01
(BLK)
5
3
1
TBO.2
2
X9
X8
1
3
CN3C 1
(BLU) 3
X13
CNBHT(BLK)
CNBH
(WHT)
CN3C
(BLU)
1
CNV1
(WHT)
FTC4
8
9
10
11
12
13
14
X12
3
2 TBO.1
L N
BLK
CN01
(BLK)
5
3
1
CN01 5
(BLK)
3
1
CNP1(WHT)
X2
1
3
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TBO.2
BH1 BH2
2
RED
BLU
CNPWM
(WHT)
1
S1 S2 S3 TB1
YLW
ORN
D
RE
BLU
1
Wireless receiver
(Option)
RED
BLU
3
2 4 6 A2
L N
3
F2
1 3 5 A1
BHCP
CN01
(BLK)
5
F1
Signal
output
(Boiler)
GRN/YLW
2 4
YLW
ORN
ECB1
CIRCUIT
BREAKER
L N
(1) (3)
OFF
OFF
OFF
OFF
Heating
Stop
Stop
OFF
OFF
OFF
OFF
OFF
Normal
Normal
DHW
ON
ON
ON
ON
DHW
Close
Open
ON
ON
ON
ON
ON
Error
Defrost
Heating
Name
Thermistor (Room temp.)(Option)
Thermistor (Flow water temp.)
Thermistor (Return water temp.)
Thermistor (DHW tank water temp.)(Option)
Thermistor (Zone1 flow temp.)(Option)
Thermistor (Zone1 return temp.)(Option)
Thermistor (Zone2 flow temp.)(Option)
Thermistor (Zone2 return temp.)(Option)
Thermistor (Boiler flow temp.)(Option)
Thermistor (Boiler return temp.)(Option)
Room thermostat 1 (Field supply)
Flow switch 1
Flow switch 2 (Field supply)
Demand control (Field supply)
Outdoor thermostat (Field supply)
Room thermostat 2 (Field supply)
Flow switch 3 (Field supply)
FLOW TEMP. CONTROLLER (FTC4)
TBO.1~2 Terminal block <Outputs>
TBI.1~2 Terminal block <Signal Inputs, Thermistor>
F1~F2 Fuse (T6.3AL250V)
SW1~4 Dip switch *See 6-11 Dip switch setting
X1~X12 Relay
LED1 Power supply (FTC4)
LED2 Power supply (Main controller)
LED3 Communication (FTC4-Outdoor unit)
LED4 Reading or writing data to SD card
CNPWM Pump speed control signal for MP1
CN108 SD card connector
1. Symbols used in wiring diagram are,
: connector,
: terminal block.
2. Indoor unit and outdoor unit connecting wires
have polarities, make sure to match terminal numbers
(S1, S2, S3) for correct wirings,
3. Since the outdoor unit side electric wiring may change,
be sure to check the outdoor unit electric wiring
diagram for servicing.
4. This diagram shows the wiring of indoor unit and
outdoor unit connecting wires (specification of 230V),
adopting superimposed system of power and signal.
When work to supply power separately to indoor
unit and outdoor unit was applied, refer to Figure 1.
20
6-9. EHPX-YM9B
Cylinder unit powered
by independent source.
Cylinder unit powered
via outdoor unit
Power supply
to Booster heater
3~ 400V 50Hz
To outdoor
unit
Power supply To outdoor
unit
~/N 230V 50Hz
RED
WHT
BLK
M
1 3 5 A1 BHC2
1~
GRY
GRY
BHC1
1 3 5 A1
MP1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
3
M
1~
MP2
1~
VLT
VLT
PNK
MP3
*1
BLU/No.4
BLU/No.5
BLU/No.6
WHT/No.1
WHT/No.2
WHT/No.3
M
PNK
2 4 6 A2
2 4 6 A2
Close
N
Open
M
1~
MXV
2
BH1
BHF
2
Signal
output
(Defrost)
Signal
output
(Error)
M
1~
2WV2
2
Signal 1
output
(Immersion 3
heater)
CNIH
Signal
output
(Booster
heater2+)
2
X1
(ORN)
1
3
X3
5
X4
7
9
11
X5A
13
X5B
1
3
5
X11
1
2
3
4
5
6
7
8
9
10
11
12
13
14
7
X12
9
11
13
2
3
12
4
6
CN105
(RED)
8
10
12
1
14
3
CNPWM
(WHT)
CNRF
(WHT)
3
CNBC
(GRY)
CNBHT(BLK)
3
1
1
CNIH
(ORN)
1
5
CN108
CN22
(BLU)
CNBHT 1
(BLK) 2
SW4
CN2F CN20 CN21 CNW12 CNW5
(YLW) (RED) (YLW) (RED) (WHT)
1
1
1
1
1
2
3
2
3
4
5
2 4 6 8 10 12 14
7
LED1
SW2
6
SW1
8 1
8
SW3
1 3 5 7 9 11 13
TBI.1
3
CNBC
(GRY)
1
1
2 4 6 8 10 12 14
3 5 7 9 11 13
1
1
TBI.2
1
8
*1
3WV
2WV1
TBI.1
3WV
2WV1
6 7 8 9 10 11 12 13 14
1 2 3 4 5 6 7 8 9 10 11 12 13 14
CN22
(BLU)
CN2F
(YLW)
1~
3
t°
THW9
t°
THW7
t°
THW6
t°
THWB2
t°
THW8
IN7
IN6
IN5
IN4
IN3
IN2
IN1
t°
2
Main
controller
1
t°
THW5
t°
1
THWB1
2
4 1
t°
TH1
t°
1
THW2
2
1
THW1
1~
CNW5
(WHT)
M
CNW12
(RED)
M
TBI.2
1 2 3 4 5
TBO.1 9 10 11
CN20
(RED)
TBO.1 9 10 11
Table 1 Signal Inputs
Name
IN1
IN2
IN3
IN4
IN5
IN6
IN7
Terminal block Connector
TBI.1 1-2
—
TBI.1 3-4
CN2F
TBI.1 5-6
—
—
TBI.1 7-8
TBI.1 9-10
—
TBI.1 11-12
—
—
TBI.1 13-14
Item
Room thermostat 1 input
Flow switch 1 input
Flow switch 2 input (Zone1)
Demand control input
Outdoor thermostat input *1
Room thermostat 2 input
Flow switch 3 input (Zone2)
OFF (Open)
ON (Short)
Refer to SW2-1 in <6-11 Dip switch setting>
Refer to SW2-2 in <6-11 Dip switch setting>
Refer to SW3-2 in <6-11 Dip switch setting>
Normal
Heat source OFF/Boiler operation *2
Standard operation
Heater operation/Boiler operation *2
Refer to SW3-1 in <6-11 Dip switch setting>
Refer to SW3-3 in <6-11 Dip switch setting>
*1. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and
related parts may be reduced.
*2. To turn on the boiler operation, use the main controller to select “Boiler” in “External/input setting“
screen in the service menu.
Table 2 Outputs
Name
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
OUT10
OUT11
OUT12
OUT13
Terminal block Connector
Item
TBO.1 3-4
CNP1
Water circulation pump 1 output (Space heating & DHW)
TBO.1 5-6
—
Water circulation pump 2 output (Space heating for Zone1)
TBO.1 7-8
—
Water circulation pump 3 output (Space heating for Zone2)
TBO.1 9-11
CNV1
3-way valve (2-way valve1) output
TBO.1 12-13
—
Mixing valve output
TBO.1 13-14
—
CNBH 1-3 Booster heater 1 output
—
CNBH 5-7 Booster heater 2 output
TBO.2 11-12
—
Booster heater 2+ output
TBO.2 9-10
CNIH
Immersion heater output
TBO.1 1-2
—
Boiler output
TBO.2 1-2
—
Error output
TBO.2 3-4
—
Defrost output
TBO.2 7-8
—
2-way valve 2 output
Symbol
TB1
ECB1
MP1
MP2
Name
Terminal block <Power supply, Outdoor unit>
Earth leakage circuit breaker for booster heater
Water circulation pump1(Space heating & DHW)
Water circulation pump2
(Space heating for Zone1)(Field supply)
MP3
Water circulation pump3
(Space heating for Zone2)(Field supply)
3WV(2WV1)
2WV2
MXV
BHT
BHF
BH1
BH2
BHC1
BHC2
BHCP
3-way valve (2-way valve1)(Field supply)
2-way valve2 (Field supply)
Mixing valve (Field supply)
Thermostat for booster heater
Thermal fuse for booster heater
Booster heater 1
Booster heater 2
Contactor for booster heater 1
Contactor for booster heater 2
Contactor for booster heater protection
OCH532A
Symbol
TH1
THW1
THW2
THW5
THW6
THW7
THW8
THW9
THWB1
THWB2
IN1
IN2
IN3
IN4
IN5
IN6
IN7
YLW
ORN
RED
BLU
GRN/YLW
1
5
LED2
1
BRN
ORN
Figure 1
LED4
X7
3
LED3
7
3
CN3C
(BLU)
1
BRN
ORN
3
TBO.2
2
CNBH
(WHT)
1
CN01
(BLK)
5
3
1
14
1
X6
YLW
ORN
RED
BLU
CN3C 1
(BLU) 3
FTC4
X9
X8
CNBH
(WHT)
CN3C
(BLU)
1
CNV1
(WHT)
5
8
10
X13
3
2
6
1
3
2
1
2 TBO.1
1
4
S1 S2 S3 TB1
BLK
CN01
(BLK)
5
3
1
CN01 5
(BLK)
3
1
CNP1(WHT)
X2
TBO.2
2
BH2
BHT
BLK
X10
L N
YLW
ORN
TBO.1
CNP1
(WHT)
1
S1 S2 S3 TB1
YLW
ORN
CNPWM
(WHT)
1
3
D
RE T
WH K
BL
1
Wireless receiver
(Option)
RED
WHT
BLK
3
2 4 6 A2
L N
3
F2
1 3 5 A1
BHCP
CN01
(BLK)
5
F1
Signal
output
(Boiler)
GRN/YLW
2 4 6
CIRCUIT
BREAKER
L1 L2 L3
(1) (3) (5)
ECB1
OFF
OFF
OFF
OFF
Heating
Stop
Stop
OFF
OFF
OFF
OFF
OFF
Normal
Normal
DHW
ON
ON
ON
ON
DHW
Close
Open
ON
ON
ON
ON
ON
Error
Defrost
Heating
FLOW TEMP. CONTROLLER (FTC4)
Name
TBO.1~2 Terminal block <Outputs>
Thermistor (Room temp.)(Option)
TBI.1~2 Terminal block <Signal Inputs, Thermistor>
Thermistor (Flow water temp.)
F1~F2 Fuse (T6.3AL250V)
Thermistor (Return water temp.)
SW1~4 Dip switch *See 6-11 Dip switch setting
Thermistor (DHW tank water temp.)(Option)
X1~X12 Relay
Thermistor (Zone1 flow temp.)(Option)
LED1 Power supply (FTC4)
Thermistor (Zone1 return temp.)(Option)
LED2 Power supply (Main controller)
Thermistor (Zone2 flow temp.)(Option)
LED3 Communication (FTC4-Outdoor unit)
Thermistor (Zone2 return temp.)(Option)
LED4 Reading or writing data to SD card
Thermistor (Boiler flow temp.)(Option)
CNPWM Pump speed control signal for MP1
Thermistor (Boiler return temp.)(Option)
CN108 SD card connector
Room thermostat 1 (Field supply)
Flow switch 1
1. Symbols used in wiring diagram are,
Flow switch 2 (Field supply)
: connector,
: terminal block.
2. Indoor unit and outdoor unit connecting wires
Demand control (Field supply)
have polarities, make sure to match terminal numbers
Outdoor thermostat (Field supply)
(S1, S2, S3) for correct wirings,
Room thermostat 2 (Field supply)
3. Since the outdoor unit side electric wiring may change,
Flow switch 3 (Field supply)
be sure to check the outdoor unit electric wiring
diagram for servicing.
4. This diagram shows the wiring of indoor unit and
outdoor unit connecting wires (specification of 230V),
adopting superimposed system of power and signal.
When work to supply power separately to indoor
unit and outdoor unit was applied, refer to Figure 1.
21
6-10. ERSC-VM2B
Cylinder unit powered
by independent source.
Cylinder unit powered
via outdoor unit
Power supply
to Booster heater
~/N 230V 50Hz
To outdoor
unit
Power supply To outdoor
unit
~/N 230V 50Hz
3
M
1~
GRY
GRY
BHC1
1 3 5 A1
MP1
CNP1
(WHT)
1
3
M
1~
MP2
M
1~
2 4 6 A2
VLT
VLT
MP3
WHT/No.1
WHT/No.2
*1
Close
N
Open
M
1~
MXV
BHF
2
Signal
output
(Defrost)
BHT
Signal
output
(Error)
M
1~
2WV2
2
Signal 1
output
(Immersion 3
heater)
CNIH
Signal (ORN)
output
(Booster
heater2+)
2
X1
CNP1(WHT)
X2
1
3
X3
5
X4
7
9
11
X5A
13
X5B
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
3
5
X11
7
X12
9
11
13
3
6
CN3C 1
(BLU) 3
FTC4
12
4
6
CN105
(RED)
8
10
12
1
14
3
CNPWM
(WHT)
CNRF
(WHT)
3
7
1
CNBC
(GRY)
3
1
1
CNIH
(ORN)
1
5
5
SW4
2 4 6 8 10 12 14
7
LED1
SW2
6
SW1
8 1
8
SW3
1 3 5 7 9 11 13
TBI.1
3
CNBC
(GRY)
1
1
2 4 6 8 10 12 14
3 5 7 9 11 13
1
1
TBI.2
1
8
*1
2WV1
TBI.1
CNW5
(WHT)
CNW12
(RED)
M
2WV1
6 7 8 9 10 11 12 13 14
1 2 3 4 5 6 7 8 9 10 11 12 13 14
CN22
(BLU)
CN2F
(YLW)
1~
3
t°
THW9
t°
THW7
t°
THW6
t°
THWB2
t°
THW8
IN7
IN6
IN4
IN5
t°
THWB1
t°
2
Main
controller
1
IN3
t°
IN1
t°
1
IN2
t°
THW5
t°
2
4 1
THW2
3 1
THW1
2 1
TH2
1
TH1
1~
CN21
(YLW)
M
3WV
TBI.2
1 2 3 4 5
TBO.1 9 10 11
CN20
(RED)
3WV
TBO.1 9 10 11
Table 1 Signal Inputs
Name
IN1
IN2
IN3
IN4
IN5
IN6
IN7
Terminal block Connector
TBI.1 1-2
—
TBI.1 3-4
CN2F
TBI.1 5-6
—
—
TBI.1 7-8
TBI.1 9-10
—
TBI.1 11-12
—
—
TBI.1 13-14
Item
Room thermostat 1 input
Flow switch 1 input
Flow switch 2 input (Zone1)
Demand control input
Outdoor thermostat input *1
Room thermostat 2 input
Flow switch 3 input (Zone2)
OFF (Open)
ON (Short)
Refer to SW2-1 in <6-11 Dip switch setting>
Refer to SW2-2 in <6-11 Dip switch setting>
Refer to SW3-2 in <6-11 Dip switch setting>
Normal
Heat source OFF/Boiler operation *2
Standard operation
Heater operation/Boiler operation *2
Refer to SW3-1 in <6-11 Dip switch setting>
Refer to SW3-3 in <6-11 Dip switch setting>
*1. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and
related parts may be reduced.
*2. To turn on the boiler operation, use the main controller to select “Boiler” in “External/input setting“
screen in the service menu.
Table 2 Outputs
Name
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
OUT10
OUT11
OUT12
OUT13
Terminal block Connector
Item
TBO.1 3-4
CNP1
Water circulation pump 1 output (Space heating & DHW)
TBO.1 5-6
—
Water circulation pump 2 output (Space heating for Zone1)
TBO.1 7-8
—
Water circulation pump 3 output (Space heating for Zone2)
TBO.1 9-11
CNV1
3-way valve (2-way valve1) output
TBO.1 12-13
—
Mixing valve output
TBO.1 13-14
—
CNBH 1-3 Booster heater 1 output
—
CNBH 5-7 Booster heater 2 output
TBO.2 11-12
—
Booster heater 2+ output
TBO.2 9-10
CNIH
Immersion heater output
TBO.1 1-2
—
Boiler output
TBO.2 1-2
—
Error output
TBO.2 3-4
—
Defrost output
TBO.2 7-8
—
2-way valve 2 output
Symbol
TB1
ECB1
MP1
MP2
Name
Terminal block <Power supply, Outdoor unit>
Earth leakage circuit breaker for booster heater
Water circulation pump1(Space heating & DHW)
Water circulation pump2
(Space heating for Zone1)(Field supply)
MP3
Water circulation pump3
(Space heating for Zone2)(Field supply)
3WV(2WV1)
2WV2
MXV
BHT
BHF
BH1
BHC1
BHCP
3-way valve (2-way valve1)(Field supply)
2-way valve2 (Field supply)
Mixing valve (Field supply)
Thermostat for booster heater
Thermal fuse for booster heater
Booster heater 1
Contactor for booster heater 1
Contactor for booster heater protection
OCH532A
Symbol
TH1
TH2
THW1
THW2
THW5
THW6
THW7
THW8
THW9
THWB1
THWB2
IN1
IN2
IN3
IN4
IN5
IN6
IN7
YLW
ORN
RED
BLU
GRN/YLW
CN108
CN22
(BLU)
CNBHT 1
(BLK) 2
CN2F CN20 CN21 CNW12 CNW5
(YLW) (RED) (YLW) (RED) (WHT)
1
1
1
1
1
2
3
2
3
4
X7
YLW
ORN
1
5
LED2
3
BRN
ORN
Figure 1
LED4
1
3
LED3
CNBH
(WHT)
X6
CN3C
(BLU)
1
BRN
ORN
3
TBO.2
2
1
CNBHT(BLK)
CN01
(BLK)
5
3
1
14
X9
X8
CNBH
(WHT)
CN3C
(BLU)
1
CNV1
(WHT)
5
8
10
X13
3
2
1
2 TBO.1
1
4
S1 S2 S3 TB1
BLK
CN01
(BLK)
5
3
1
CN01 5
(BLK)
3
1
L N
YLW
ORN
BLK
X10
1
3
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TBO.2
BH1
2
RED
BLU
CNPWM
(WHT)
1
TBO.1
D
RE
BLU
1
S1 S2 S3 TB1
Wireless receiver
(Option)
RED
BLU
3
2 4 6 A2
L N
3
F2
1 3 5 A1
BHCP
CN01
(BLK)
5
F1
Signal
output
(Boiler)
GRN/YLW
2 4
YLW
ORN
ECB1
CIRCUIT
BREAKER
L N
(1) (3)
OFF
OFF
OFF
OFF
Heating
Stop
Stop
OFF
OFF
OFF
OFF
OFF
Normal
Normal
DHW
ON
ON
ON
ON
DHW
Close
Open
ON
ON
ON
ON
ON
Error
Defrost
Heating
FLOW TEMP. CONTROLLER (FTC4)
Name
TBO.1~2 Terminal block <Outputs>
Thermistor (Room temp.)(Option)
Thermistor (Ref. liquid temp.)
TBI.1~2 Terminal block <Signal Inputs, Thermistor>
Thermistor (Flow water temp.)
F1~F2 Fuse (T6.3AL250V)
Thermistor (Return water temp.)
SW1~4 Dip switch *See 6-11 Dip switch setting
Thermistor (DHW tank water temp.)(Option)
X1~X12 Relay
Thermistor (Zone1 flow temp.)(Option)
LED1 Power supply (FTC4)
Thermistor (Zone1 return temp.)(Option)
LED2 Power supply (Main controller)
Thermistor (Zone2 flow temp.)(Option)
LED3 Communication (FTC4-Outdoor unit)
Thermistor (Zone2 return temp.)(Option)
LED4 Reading or writing data to SD card
Thermistor (Boiler flow temp.)(Option)
CNPWM Pump speed control signal for MP1
Thermistor (Boiler return temp.)(Option)
CN108 SD card connector
Room thermostat 1 (Field supply)
1. Symbols used in wiring diagram are,
: connector,
: terminal block.
Flow switch 1
2. Indoor unit and outdoor unit connecting wires
Flow switch 2 (Field supply)
have polarities, make sure to match terminal numbers
Demand control (Field supply)
(S1, S2, S3) for correct wirings,
Outdoor thermostat (Field supply)
3. Since the outdoor unit side electric wiring may change,
be sure to check the outdoor unit electric wiring
Room thermostat 2 (Field supply)
diagram for servicing.
Flow switch 3 (Field supply)
4. This diagram shows the wiring of indoor unit and
outdoor unit connecting wires (specification of 230V),
adopting superimposed system of power and signal.
When work to supply power separately to indoor
unit and outdoor unit was applied, refer to Figure 1.
22
6-11. Dip switch setting
Located on the FTC4 printed circuit board are 4 sets of small white switches
known as Dip switches. The Dip switch number is printed on the circuit board
next to the relevant switches. The word ON is printed on the circuit board and on
the Dip switch block itself. To move the switch you will need to use a pin or the
corner of a thin metal ruler or similar.
SW4
SW1
SW2
Dip switch settings are listed in the table below.
Before changing any switch settings, ensure power supplies to indoor and outdoor units are isolated/powered off.
SW3
WITHOUT Boiler
WITH Boiler
Default settings:
Indoor unit model
OFF
SW1-2 Heat pump maximum outlet water temperature
55ºC
60ºC
ON *1
SW1-3 DHW tank
WITHOUT DHW tank
WITH DHW tank
OFF
SW1-4 Immersion heater
WITHOUT Immersion heater
WITH Immersion heater
OFF
Dip switch
Function
SW1 SW1-1 Boiler
OFF
SW1-5 Booster heater
WITHOUT Booster heater
WITH Booster heater
ON
SW1-6 Booster heater function
For heating only
For heating and DHW
SW1-7 Outdoor unit type
Split type
Packaged type
SW1-8 Wireless remote controller
WITHOUT Wireless remote controller WITH Wireless remote controller
ON
OFF: E*SC-*M*B
ON : EHPX-*M*B
OFF
SW2 SW2-1 Room thermostat1 input (IN1) logic change
Zone1 operation stop at thermostat short Zone1 operation stop at thermostat open
OFF
SW2-2 Flow switch1 input (IN2) logic change
Failure detection at short
Failure detection at open
SW2-3 Booster heater capacity restriction
Inactive
Active
SW2-4 Cooling mode function
Inactive
Active
ON
OFF: Except
E***-VM2B
ON : E***-VM2B
OFF: Except
ERSC-VM2B
ON : ERSC-VM2B
Automatic switch to backup heat source operation
Inactive
(When outdoor unit stops by error)
SW2-6 Mixing tank
WITHOUT Mixing tank
Active *2
OFF
WITH Mixing tank
OFF
SW2-7 2-zone temperature control
Active
OFF
SW2-5
SW2-8
—
SW3 SW3-1 Room thermostat 2 input (IN6) logic change
Inactive
—
-
OFF
Zone2 operation stop at thermostat short Zone2 operation stop at thermostat open
OFF
SW3-2 Flow switch 2 input (IN3) logic change
Failure detection at short
Failure detection at open
OFF
SW3-3 Flow switch 3 input (IN7) logic change
Failure detection at short
Failure detection at open
OFF
SW3-4 Cooling operation in Zone2
SW3-5 Heating mode function *3
SW3-6
—
Not in use
Inactive
In use
Active
—
—
OFF
OFF
OFF
SW3-7
—
—
—
OFF
SW3-8
—
—
—
SW4 SW4-1 Multiple outdoor units control
Inactive
Active
OFF
OFF
SW4-2 Position of multiple outdoor units control *4
Slave
Master
OFF
SW4-3 LED3 display
Indoor-outdoor communication
Refrigerant address
OFF
SW4-4
Note:
ON
—
—
—
OFF
SW4-5 Emergency mode (Heater only operation)
Normal
"Emergency mode (Heater only operation)
OFF *5
(To be activated only when powered ON)"
SW4-6 Emergency mode (Boiler operation)
Normal
"Emergency mode (Boiler operation)
OFF *5
(To be activated only when powered ON)"
1. When the hydrobox is connected with a PUHZ-RP outdoor unit of which maximum outlet water temperature is 55ºC, Dip SW1-2 must be changed to OFF.
2. OUT11 will be available. For safety reasons, this function is not available for certain errors. (In that case, system operation must be stopped
and only the water circulation pump keeps running.)
3 This switch functions only when the hydrobox is connected with a PUHZ-FRP outdoor unit. When another type of outdoor unit is connected,
the heating mode function is active regardless of the fact that this switch is ON or OFF.
4. SW4-2 is available only when SW4-1 is ON.
5. If emergency mode is no longer required, return the switch to OFF position.
Automatic switch to heat source only operation
Back-up heat source operation (*1) will automatically run when the outdoor unit stops abnormally.
To enable the function, switch Dip SW 2-5 to ON.
During the back-up operation, an error code(s) and the contact number will be displayed alternately.
External output (OUT11) will be available.
To clear the fault(s), reset the power breakers on the indoor and outdoor units.
<Applicable error codes (*2)>
E6 to E9, ED, P6, P8, U1 to U8, UD, UE, UF, UL, UP
(*1) Prolonged running of the back-up operation may affect the life of the heat source.
(*2) For safety reasons, this function is not available for certain faults. (System operation must be stopped and only pump keeps running.)
OCH532A
23
7
FIELD WIRING
Breaker abbreviation
ECB1
TB1
Meaning
Earth leakage circuit breaker for booster heater
Terminal block 1
Option 1: Hydrobox powered via outdoor unit
<1 phase>
Hydrobox
TB1
L
Outdoor unit
Power
supply
~/N
230V
50Hz
Earth
leakage
circuit
breaker
*1
Wiring
circuit
breaker or
Isolating
switch
N
L
S1
S1
N
S2
S2
S3
S3
To control
board
ECB1
Power
supply
~/N
230V
50Hz
Wiring
circuit
breaker or
Isolating
switch
L
N
For
booster
heater
(Primary circuit)
*1 If the installed earth leakage circuit breaker does not have an over-current protection function, install a breaker with that function along the same
power line.
*2 Affix label A which is included with the manuals near each wiring diagram for hydrobox and outdoor units.
<Figure 7-1>
Electrical connections 1 phase
Description
Circuit
rating
Wiring
Wiring No.
× size (mm²)
Booster heater (Primary circuit)
Power supply
Capacity
~/N 230 V 50 Hz
2 kW
6 kW
Breaker
16 A *1
32 A *1
Hydrobox - Outdoor unit
*2
3 × 1.5 (polar)
Hydrobox - Outdoor unit earth
*2
1 × Min. 1.5
Hydrobox - Outdoor unit S1 - S2
*3
230V AC
Hydrobox - Outdoor unit S2 - S3
*3
24V DC
Wiring
2.5 mm²
6.0 mm²
*1. A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
The breaker shall be provided to ensure disconnection of all active phase conductors of the supply.
*2. Max. 45 m
If 2.5 mm² used, Max. 50 m
If 2.5 mm² used and S3 separated, Max. 80 m
*3. The values given in the table above are not always measured against the ground value.
Notes:
1. Wiring size must comply with the applicable local and national codes.
2. Indoor unit/outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60245 IEC 57)
Indoor unit power supply cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60227 IEC 53)
3. Install an earth longer than other cables.
4. Please keep enough output capacity of power supply for each heater. Insufficient power supply capacity might cause chattering.
OCH532A
24
<3 phase>
Hydrobox
TB1
L1
Outdoor unit
Power
supply
3N~
400V
50Hz
Earth
leakage
circuit
breaker
*1
Wiring
circuit
breaker or
Isolating
switch
L2
L1
S1
S1
L2
S2
S2
L3
S3
S3
To control
board
N
ECB1
L1
Wiring
circuit
breaker or
Isolating
switch
Power supply
3~ 400 V 50 Hz (EH**-YM9(E)B)
3~ 230 V 50 Hz (EHSC-TM9B)
L2
For
booster
heater
(Primary circuit)
L3
*1 If the installed earth leakage circuit breaker does not have an over-current protection function, install a breaker with that function along the same
power line.
*2 Affix label A which is included with the manuals near each wiring diagram for hydrobox and outdoor units.
<Figure 7-2>
Electrical connections 3 phase
Description
Circuit
rating
Wiring
Wiring No.
× size (mm²)
Booster heater (Primary circuit)
Power supply
Capacity
3~ 400 V 50 Hz
3~ 230 V 50 Hz
9 kW
9 kW
Breaker
16 A *1
32 A *1
Hydrobox - Outdoor unit
*2
3 × 1.5 (polar)
Hydrobox - Outdoor unit earth
*2
1 × Min. 1.5
Hydrobox - Outdoor unit S1 - S2
*3
230V AC
Hydrobox - Outdoor unit S2 - S3
*3
24V DC
Wiring
2.5 mm²
6.0 mm²
*1. A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
The breaker shall be provided to ensure disconnection of all active phase conductors of the supply.
*2. Max. 45 m
If 2.5 mm² used, Max. 50 m
If 2.5 mm² used and S3 separated, Max. 80 m
*3. The values given in the table above are not always measured against the ground value.
Notes:
1. Wiring size must comply with the applicable local and national codes.
2. Indoor unit/outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60245 IEC 57)
Indoor unit power supply cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60227 IEC 53)
3. Install an earth longer than other cables.
4. Please keep enough output capacity of power supply for each heater. Insufficient power supply capacity might cause chattering.
OCH532A
25
BLACK
YELLOW
Black
CN01
BLACK
S1
YELLOW
• Change connector connections in hydrobox control and electrical box
(see Figure 7-3).
• Turn the outdoor unit DIP switch SW8-3 to ON.
• Turn on the outdoor unit BEFORE the hydrobox.
YELLOW
Initial settings
(Power supplied
by outdoor unit)
YELLOW
N
BLACK
L
If the hydrobox and outdoor units have separate power supplies, the following
requirements MUST be carried out:
BLACK
Option2: Hydrobox powered by independent source
CN01
Hydrobox
control board
S2
S3
L
N
S1
Black
CN01
Modified settings
(Separate power
supply to
the hydrobox)
CN01
Hydrobox
control board
S2
S3
<Figure 7-3>
<1 phase>
Hydrobox
TB1
Power
supply
~/N
230V
50Hz
Earth
leakage
circuit
breaker
*1
Wiring
circuit
breaker or
Isolating
switch
L
N
Outdoor unit
Power
supply
~/N
230V
50Hz
Earth
leakage
circuit
breaker
*1
Wiring
circuit
breaker or
Isolating
switch
L
S1
S1
N
S2
S2
S3
S3
ECB1
Wiring
circuit
breaker or
Isolating
switch
Power
supply
~/N
230V
50Hz
L
N
To control
board
For
booster
heater
(Primary circuit)
*1 If the installed earth leakage circuit breaker does not have an over-current protection function, install a breaker with that function along the same
power line.
*2 Affix label B which is included with the manuals near each wiring diagram for hydrobox and outdoor units.
<Figure 7-4>
Electrical connections 1 phase
Description
Booster heater (Primary circuit)
Power supply
Wiring
Wiring No.
× size (mm²)
Hydrobox power supply
Hydrobox input capacity
Main switch (Breaker)
Hydrobox power supply
Hydrobox power supply earth
Hydrobox - Outdoor unit
Hydrobox - Outdoor unit earth
Hydrobox L - N
Hydrobox - Outdoor unit S1 - S2
Hydrobox - Outdoor unit S2 - S3
Circuit
rating
Capacity
~/N 230 V 50 Hz
2 kW
6 kW
Breaker
16 A *1
32 A *1
Wiring
2.5 mm²
6.0 mm²
~/N 230 V 50 Hz
*1
*2
*3
*3
*3
16 A
2 × Min. 1.5
1 × Min. 1.5
2 × Min. 0.3
—
230V AC
—
24V DC
*1. A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
The breaker shall be provided to ensure disconnection of all active phase conductors of the supply.
*2. Max. 120 m
*3. The values given in the table above are not always measured against the ground value.
Notes:
1. Wiring size must comply with the applicable local and national codes.
2. Indoor unit/outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60245 IEC 57)
Indoor unit power supply cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60227 IEC 53)
3. Install an earth longer than other cables.
4. Please keep enough output capacity of power supply for each heater. Insufficient power supply capacity might cause chattering.
OCH532A
26
<3 phase>
Hydrobox
TB1
Power
supply
~/N
230V
50Hz
Wiring
circuit
breaker or
Isolating
switch
Earth
leakage
circuit
breaker
*1
L
N
Outdoor unit
Power
supply
3N~
400V
50Hz
Wiring
circuit
breaker or
Isolating
switch
Earth
leakage
circuit
breaker
*1
L1
S1
S1
L2
S2
S2
L3
S3
S3
To control
board
N
ECB1
Wiring
circuit
breaker or
Isolating
switch
Power supply
3~ 400 V 50 Hz (EH**-YM9(E)B)
3~ 230 V 50 Hz (EHSC-TM9B)
L1
L2
For
booster
heater
(Primary circuit)
L3
*1 If the installed earth leakage circuit breaker does not have an over-current protection function, install a breaker with that function along the same power line.
*2 Affix label B which is included with the manuals near each wiring diagram for hydrobox and outdoor units.
<Figure 7-5>
Electrical connections 3 phase
Description
Booster heater (Primary circuit)
Power supply
Wiring
Wiring No.
× size (mm²)
Hydrobox power supply
Hydrobox input capacity
Main switch (Breaker)
Hydrobox power supply
Hydrobox power supply earth
Hydrobox - Outdoor unit
Hydrobox - Outdoor unit earth
Hydrobox L - N
Hydrobox - Outdoor unit S1 - S2
Hydrobox - Outdoor unit S2 - S3
Circuit
rating
Capacity
3~ 400 V 50 Hz
3~ 230 V 50 Hz
Breaker
9 kW
9 kW
16 A *1
32 A *1
Wiring
2.5 mm²
6.0 mm²
~/N 230 V 50 Hz
*1
*2
*3
*3
*3
16 A
2 × Min. 1.5
1 × Min. 1.5
2 × Min. 0.3
—
230V AC
—
24V DC
*1. A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
The breaker shall be provided to ensure disconnection of all active phase conductors of the supply.
*2. Max. 120 m
*3. The values given in the table above are not always measured against the ground value.
Notes:
1. Wiring size must comply with the applicable local and national codes.
2. Indoor unit/outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60245 IEC 57)
Indoor unit power supply cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60227 IEC 53)
3. Install an earth longer than other cables.
4. Please keep enough output capacity of power supply for each heater. Insufficient power supply capacity might cause chattering.
OCH532A
27
8
WATER SYSTEM DIAGRAM
A
<EHSC> (Split model system)
<ERSC> (Split model system for heating and cooling)
B
Cold
DHW water
Hydrobox
9
10
22
23
21
2
13
20
4
5
3
15
1
12
6
16
14
8
11
17
Pa
18
25
7
Drain
24
Local
system *1
19
24
23
Water
supply
Drain
A.
B.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
Refrigerant pipe
Water pipe
Plate heat exchanger
Flexible hose
Booster heater 1,2
Drain cock (booster heater)
Pump valve
Water circulation pump 1
Manometer
Pressure relief valve
Automatic air vent
Expansion vessel (except EHSC-*M*EB)
Strainer valve
Flow switch
THW1
THW2
TH2
THW5 (optional part PAC-TH011TK-E)
Outdoor unit
Drain pipe (field supply)
3-way valve (field supply)
DHW indirect unvented tank (field supply)
Cold water inlet pipe (field supply)
DHW outlet connection (field supply)
Back flow prevention device (field supply)
Isolating valve (field supply)
Magnetic filter is recommended (field supply).
Strainer (field supply)
*1 Refer to page 29.
<EHPX> (Packaged model system)
B
Hydrobox
9
Cold
DHW water
10
22
23
21
13
20
4
5
3
12
17
1
24
26
6
16
14
8
11
25
18
Pa
7
24
Local
system *1
19
26
24
24
23
Water
supply
OCH532A
Drain
28
Note
• Be sure to follow your local regulations to perform system configuration of the DHW connections.
• DHW connections are not included in the hydrobox package. All required parts are to be
sourced locally.
• To enable draining of the hydrobox an isolating
valve should be positioned on both the inlet and
outlet pipework.
• Be sure to install a strainer, on the inlet pipe
work to the hydrobox.
• Suitable drain pipework should be attached to
all relief valves in accordance with your country's regulations.
• A backflow prevention device must be installed
on water supply pipework (IEC 61770).
• When using components made from different
metals or connecting pipes made of different
metals insulate the joints to prevent a corrosive
reaction taking place which will damage the
pipework.
Local system
1-zone temperature control
Zone1
Zone1
3
5
4
1
2
2-zone temperature control
1
6
Zone1
3
5
4
6
㪎
2
1
Zone2
㪈㪇
8
9
12
㪈㪈
1-zone temperature control with boiler
2-zone temperature control with boiler
13
13
14
14
15
15
Zone1
Zone1
3
3
5
4
6
4
2
5
1
2
6
7
1
Zone2
10
8
9
11
12
1. Zone1 heat emitters (e.g. radiator, fan coil unit) (field supply)
2. Mixing tank (field supply)
3. Zone1 flow water temp. thermistor (THW6)
4. Zone1 return water temp. thermistor (THW7)
Optional part : PAC-TH011-E
5. Zone1 water circulation pump (field supply)
6. Zone1 flow switch (field supply) *
7. Motorized mixing valve (field supply)
8. Zone2 flow water temp. thermistor (THW8)
9. Zone2 return water temp. thermistor (THW9)
Optional part : PAC-TH011-E
10. Zone2 water circulation pump (field supply)
11. Zone2 flow switch (field supply) *
12. Zone2 heat emitters (e.g. underfloor heating) (field supply)
13. Boiler flow water temp. thermistor (THWB1)
14. Boiler return water temp. thermistor (THWB2)
Optional part : PAC-TH011HT-E
15. Boiler
* Flow switch specifications: DC13 V / 0.1 mA / Both normally-open and normally-closed types can be used. (Set Dip switch 3 to select the logics. Refer to
“ 6-11. Dip switch setting”.)
Note
• Two different flow temperatures are NOT available in Cooing mode. The flow temperature for Zone2 during Cooling mode is controlled to be the same
temperature as that for Zone1.
• The water circuit for Zone2 can be closed during Cooling mode using dip switch 3-4.
OCH532A
29
Filling the System (Primary Circuit)
1.
2.
3.
4.
Check all connections including factory fitted ones are tight.
Insulate pipe work between hydrobox and outdoor unit.
Thoroughly clean and flush, system of all debris. (Refer to 4.2 in the installation manual.)
Fill primary heating circuit with water and suitable anti-freeze and inhibitor as necessary. Always use a filling loop with double check valve when filling the
primary circuit to avoid back flow contamination of water supply.
• Anti-freeze should always be used for package systems. It is the responsibility of the installer to decide if anti-freeze solution should be used in split systems
depending on each site’s conditions. Corrosion inhibitor should be used in both split and package systems.
• When connecting metal pipes of different materials insulate the joints to prevent a corrosive reaction taking place which will damage the pipework.
5.
6.
7.
8.
Check for leaks. If leaks are found, retighten the screws on the connections.
Pressurise system to 1 bar.
Release all trapped air using air vents during and following heating period.
Top up with water as necessary. (If pressure falls below 1 bar)
Draining the Hydrobox
WARNING: DRAINED WATER MAY BE VERY HOT
1. Before attempting to drain the hydrobox islolate from the electrical supply to prevent booster heater burning out.
2. Isolate hydrobox from primary water circuit and drain water from hydrobox. Use a suitable heat resistant hose to assist in these operations.
3. Drain any remaining water from booster heater using fitted drain cock and hose, and the drain valve on the primary circuit to safely drain the unit.
4. After the hydrobox is drained, water remains in the following component parts. Drain water completely by checking the inside of the parts.
• Strainer (Remove the strainer cover.)
• Pressure relief valve (Operate the valve.)
OCH532A
30
9
CONTROLS
9-1. Main Controller
<Main controller parts>
A
F1
F2
F3
C
Name
Function
A
B
Screen
Menu
C
D
E
Back
Confirm
Power/Holiday
F1-4
Function keys
Screen in which all information is displayed
Access to system settings for initial set up and
modifications.
Return to previous menu.
Used to select or save. (Enter key)
If system is switched off pressing once will turn
system on. Pressing again when system is
switched on will enable Holiday Mode. Holding the
button down for 3 secs will turn the system off. (*1)
Used to scroll through menu and adjust settings.
Function is determined by the menu screen visible
on screen A.
F4
*1
When the system is switched off or the power supply is disconnected, the
hydrobox protection functions (e.g. freeze stat. function) will NOT operate.
Please beware that without these safety functions enabled the hydrobox
may potentially become exposed to damage.
E
B
Letter
D
<Main screen icons>
1
2
Icon
Description
Legionella
prevention
Heat pump
When this icon is displayed ‘Legionella prevention
mode’ is active.
‘Heat pump’ is running
Defrosting
12
15 14 11
1
2
Emergency heating
3
10
3
Electric heater
4
Target
temperature
9
Space heating
(cooling) mode
10
11
12
DHW mode
Holiday mode
Normal or ECO mode
When this icon is displayed ‘Holiday mode’ activated.
OPTION
6
7
8
+
Z1
4
8
Target room temperature
Compensation curve
Pressing the function button below this icon will display the quick view menu.
Increase desired temperature.
Decrease desired temperature.
Pressing the function button below this icon switches between Zone1 and Zone2.
Pressing the function button below this icon displays
the information screen.
Heating mode
Zone1 or Zone2
5
13
9
When this icon is displayed the ‘Electric heaters’
(booster or immersion heater) are in use.
Target flow temperature
Z2
Information
Cooling mode
7
6
5
Timer
Prohibited
Stand-by
Stop
Operating
13
Current
temperature
Current room temperature
Current water temperature of DHW tank
14
The Menu button is locked or the switching of the
operation modes between DHW and Heating operations are disabled in the Option screen.
15
SD memory card is inserted. Normal operation.
SD memory card is inserted. Abnormal operation.
OCH532A
31
<Main Controller Menu Tree>
Unrestricted access
Installer only
Shaded items relate
to DHW functions.
These are only available if the system
includes a DHW tank.
Initial
Main screen
F1
Information
Option
F1
F4
F2
F3
F4
Forced DHW
DHW
Heating/Cooling
Holiday
ON/OFF
ON/Prohibited/Timer
ON/Prohibited/Timer
Active/Non active
Set time
Main menu
DHW
Normal/Eco
Edit
DHW max. temp.
DHW max. temp. drop
DHW max. operation time
DHW mode restriction
Legionella
Active/Non active
Edit
Hot water temp.
Frequency
Start time
Max. operation time
Duration of max. temp.
F1 (Zone1)
Heating/cooling mode
F2 (Zone2)
F3 (PREVIEW)
F4 (EDIT)
Compensation curve preview
Compensation curve edit
Zone1
Heating room temp./Heating flow temp./
Heating compensation curve/Cooling
flow temp.
Zone2
Room temp./Flow temp. /
Compensation curve
Zone1
F2, F3
F4
Zone2
F2, F3
F4
Schedule timer menu
Heating
Cooling
DHW
DHW 2 *1
Curve parameters
Adjustment
Curve parameters
Adjustment
Zone1
Schedule timer preview
Day select
Time select
Zone2
Schedule timer preview
Day select
Time select
Period
Schedule timer preview
Schedule timer preview
Schedule timer preview
Day select
Day select
Day select
Time select
Time setting
Time setting
Time setting
Temp. setting
Time setting
Temp. setting
Time setting
Time setting
Time setting
Holiday mode
F1
F2
F3 (EDIT)
DHW active /non active
Heating/Cooling active/non active
Holiday menu
Zone1
Heating room temp.
Heating flow temp.
Cooling flow temp.
Zone2
Heating room temp.
Heating flow temp.
Initial settings
Date/Time
Language
°C/°F
Temp. display
Contact number
Time display
Room sensor setting
Room RC zone select
Sensor setting
Continued to next page.
yyyy/mm/dd/hh:mm
ENG/FR/GER/SW/SP/IT/DA/NL/FIN/NOR/PT
°C/°F
OFF/Room/Tank/Room&Tank
hh:mm/hh:mm AM/AM hh:mm
Room RC1-8
Zone1
Sensor setting
Zone2
Select
Time/Zone
Sensor setting
Select
Time/Zone
*1 When a PUHZ-FRP outdoor unit is connected.
OCH532A
32
TH1/Main controller/
Room RC1-8/ “Time/Zone”
Time setting
Sensor setting
TH1/Main controller/
Room RC1-8/ “Time/Zone”
Time setting
Sensor setting
<Main Controller Menu Tree>
Unrestricted access
Installer only
Shaded items relate
to DHW functions.
These are only available if the system
includes a DHW tank.
Initial
Main screen
Main menu
Service
(Password protected)
Manual operation
Function settings
Thermistor adjustment
Auxiliary settings
Economy setting for pump
Electric heater (Heating)
Electric heater (DHW)
Mixing valve control
ON/OFF
Delay
ON/OFF
Delay
ON/OFF
Delay
Running
Interval
Heat source setting
Pump speed
Standard (Heat pump & electric heater)/Heater (Electric heater only)/Boiler/Hybrid (Heat pump
& heater/Boiler)
Operation settings
Freeze stat function
Simultaneous operation
Cold weather function
Room temp. control (Heating)
Flow t.
Outdoor ambient temp.
ON/OFF
Outdoor ambient temp.
ON/OFF
Outdoor ambient temp.
Temp. control interval
Flow temp. range
H/P thermo diff. adjust
Boiler settings
*2
Hybrid settings
Intelligent settings
Min. temp.
Max. temp.
ON/OFF
Lower limit
Upper limit
Outdoor ambient temp.
Priority
Ambient/Cost /CO2
Energy price
Schedule
CO2 emission
Heat source
Floor dry up function
(For more details,
refer to Page 39.)
ON/OFF
Target temp.
Flow temp. (Increase)
Flow temp. (Decrease)
External input settings
Demand control
OFF (Heat source)/Boiler
Running information
Thermistor reading
Summary of settings
Error history
Password protection
Manual reset
Outdoor thermostat
Heater/Boiler
Main controller
FTC
SD Main RC
Main RC SD
Yes/No
Yes/No
SD card
*2 For more details, refer to the installation manual of PAC-TH011HT-E.
Continued from the previous page.
OCH532A
33
Electricity
Boiler
Electricity
Boiler
Heat pump capacity
Boiler efficiency
Booster heater 1
capacity
Booster heater 2
capacity
Start & Finish
Max. temp.
Max. temp. period
Temp. increase step
Increase interval
Temp. decrease step
Decrease interval
9-2. Service Menu
The service menu provides functions for use by installer or service engineer. It is
NOT intended the home owner alters settings within this menu. It is for this
reason password protection is required to prevent unauthorised access to the
service settings.
1. From the main setting menu use F2 and F3 to highlight the service icon then
press CONFIRM.
2. You will be prompted to enter a password. THE FACTORY DEFAULT
PASSWORD IS “0000”.
3. Press CONFIRM.
(It takes approx. 30 secs to load the service menu.)
Screen 1 of service menu
The service menu is navigated using the F1 and F2 buttons to scroll through the
functions. The menu is split across three screens and is comprised of the following
functions;
1. Manual operation
2. Function settings
3. Thermistor adjustment
4. Auxiliary settings
5. Heat source setting
6. Operation settings
7. External input settings
8. Running information
9. Thermistor reading
10. Summary of settings
11. Error history
12. Password protection
13. Manual reset
14. SD card
Screen 2 of service menu
Note: Many functions can not be set whilst the indoor unit is running. The
installer should turn OFF the unit before trying to set these functions.
If the installer attempts to change the settings whilst the unit is
running the main controller will display a reminder message
prompting the installer to stop operation before continuing. By
selecting “Yes” the unit will cease operation.
System off prompt screen
Manual operation
During the filling of the system the water circulation pump and 3-way valve
(2-way valve 1), and mixing valve can be manually overridden using manual
operation mode.
When manual operation is selected a small timer icon appears in the screen. The
function selected will only remain in manual operation for a maximum of 2 hours.
This is to prevent accidental permanent override of the FTC4.
1. From the service menu use F1 and F2 buttons to scroll through list until
Manual Operation is highlighted.
2. Press CONFIRM.
3. Manual operation menu screen is displayed.
4. To activate manual operation press the function button under the desired part.
Being selected Being running
Error indication
Manual operation menu screen
►Example
Pressing F3 button will switch manual operation mode ON for the main 3-way
valve. When filling of the DHW tank is complete the installer should access this
menu again and press F3 to deactivate manual operation of the part. Alternatively
after 2 hours manual operation mode will no longer be active and FTC4 will
resume control of the part.
NOTE: Manual operation and heat source setting can not be selected if the
system is running. A screen will be displayed asking the installer to
stop the system before these modes can be activated.
The system automatically stops 2 hours after last operation.
The OUT13 output of the 2-way valve 2 constitutes an inversion of
the OUT4 output of the 2-way valve 1.
OCH532A
System off prompt screen
34
Function settings
Function Setting allows the setting of auto recovery after power failure only.
1. From the service menu use F1 and F2 to highlight Function Setting.
2. Press CONFIRM.
3. Ensure the Ref address and unit number are displayed to the right.
4. Press CONFIRM.
5. Use F3 and F4 to highlight either 1/2/3 (see below).
Note: Changes can ONLY be made to Mode 1.
6. Press CONFIRM.
Mode 1 Setting number meanings
1 - Power failure automatic recovery NOT available
2 - Power failure automatic recovery AVAILABLE
(Approx 4-minute delay after power is restored.)
3 - NO FUNCTION
Thermistor adjustment
This function allows adjustments to be made to the thermistor readings from
-10 – 10 °C in 0.5 °C intervals.
1. From the Service menu highlight Thermistor Adjustment
2. Press CONFIRM.
3. Use F1 and F2 to select thermistor.
4. Press CONFIRM.
5. Use F2 and F3 to change the thermistor temperature.
6. Press CONFIRM.
Auxiliary settings
This function is used to set the parameters for any auxiliary parts used in the
system.
From the service menu use F1 and F2 buttons to highlight Auxiliary settings then
press CONFIRM.
Auxiliary settings menu screen
<Economy settings for pump>
1. From the Auxiliary settings menu highlight Economy Settings for water
circulation pump.
2. Press CONFIRM.
3. The economy settings for water circulation pump screen is displayed.
4. Use button F1 to switch the economy settings ON/OFF.
5. Use buttons F3 and F4 to adjust the time the water circulation pump will run.
(3 - 60 mins)
Economy settings for pump screen
OCH532A
35
<Electric heater (Heating)>
1. From the Auxiliary settings menu highlight Electric heater (Heating).
2. Press CONFIRM.
3. The Electric heater (Heating) screen is displayed.
4. Press F1 button to switch the function ON/OFF.
5. Use F3 and F4 buttons to adjust the time period of heat pump only operation
before the booster heater will assist in space heating. (5 -180mins)
Electric heater (Heating) screen
<Electric heater (DHW)>
1. From the Auxiliary settings menu highlight Electric heater (DHW).
2. Press CONFIRM.
3. The Electric heater (DHW) screen is displayed.
4. Press F1 button to switch the function ON/OFF.
5. Use F3 and F4 buttons to adjust the time period of heat pump only operation
before the booster heater and the immersion heater (if present) will assist in
DHW heating. (15 -30mins)
Electric heater (DHW) screen
<Mixing valve control>
1. From the Auxiliary settings menu highlight Mixing valve control.
2. Press CONFIRM.
3. The Mixing valve control screen is displayed.
4. Use F1 and F2 buttons to set Running time between 10 to 240 seconds. The
Running time equals to a period from full open of the valve (at a hot water
mixing ratio of 100%) to full close (at a cold water mixing ratio of 100%).
Note: Set the Running time according to the specifications of the actuator
of each mixing valve.
1.
2.
3.
4.
From the Auxiliary settings menu highlight Mixing valve control.
Press CONFIRM.
The Mixing valve control screen is displayed.
Press F3 and F4 buttons to set the interval between 2-zone temperature
controls of the mixing valve between 1 to 30 mins.
Mixing valve setting screen
Note: It is recommended to set the interval to 2 minutes that is a default
value. With the interval set longer, it could take longer to warm up a
room.
<Pump speed>
1. From the Auxiliary settings menu highlight water circulation pump speed.
2. Press CONFIRM.
3. Press F3 and F4 buttons to select a refrigerant address of which you wish to
configure or check the settings, and press CONFIRM. *1
4. The Pump speed screen is displayed.
5. Use F2 and F3 buttons to set the pump speed of the water circulation pump
between 1 and 5.
*1 For multiple outdoor units control system only.
Pump speed setting screen
OCH532A
36
Heat source setting
The default heat source setting is heat pump and all electric heaters present in
the system to be operational. This is referred to as Standard operation on the
menu.
1. From the service menu use F1 and F2 buttons to scroll through list until Heat
Source Setting is highlighted.
2. Press CONFIRM.
3. Heat source setting menu screen is displayed.
4. Press F3 button until preferred heat source is displayed.
5. Press CONFIRM.
Heat source setting screen
6. If you wish to return to the service menu without saving the setting press return
button. You will be asked if you are sure you wish to cancel the changes.
Choose Yes or No as appropriate.
Cancel last action screen
Operation settings
1. To access the Operation settings menu use F1 and F2 buttons to scroll
through the service menu until Operation settings is highlighted.
2. Press CONFIRM.
3. Operation settings menu is displayed.
Operation settings menu screen
<Freeze stat function>
1. From the Auxiliary settings menu highlight Freeze Stat Function.
2. Press CONFIRM.
3. The freeze stat function screen will be displayed.
4. Use buttons F3 and F4 to adjust the minimum outdoor ambient temperature at
which freeze stat function will begin to operate, (3 - 20 °C) or choose .
If asterisk ( ) is chosen freeze stat function is deactivated. (i.e. primary water
freeze risk)
Note: When the system is turned off, freeze stat function is not enabled.
Freeze stat function screen
<Simultaneous Operation>
For periods of very low outside temperature this mode can be used.
Simultaneous operation allows both DHW and space heating to run together by
using the heat pump and/or booster heater to provide space heating whilst only
the immersion heater provides heating for DHW. This operation is only available
if BOTH a DHW tank AND immersion heater are present on the system.
1. From the Operation settings menu use F1 and F2 buttons to scroll through the
list until Simultaneous operation is highlighted.
2. Press CONFIRM.
3. Simultaneous operation screen is displayed.
4. To switch simultaneous operation ON/OFF press F1.
5. To alter the temperature at which simultaneous operation starts use F3 and F4.
Simultaneous operation screen
Note:
• Range of outdoor ambient temperature is −15°C to 10°C (default −15°C).
• System shall automatically return to routine operation. This will happen
when the outdoor ambient temp rises above the selected temp for this
specific mode of operation.
OCH532A
37
<Cold weather function>
For extremely low outdoor ambient temperature conditions when the heat pump’s
capacity is restricted the heating or DHW is provided only by the electric booster
heater (and immersion if present). This function is intended for use during
extreme cold periods only. Extensive use of direct electrical heaters ONLY will
result in higher electric usage and may reduce working life of heaters and related
parts.
1. From the Operation settings menu use F1 and F2 buttons to scroll through the
list until Cold weather function is highlighted.
2. Press CONFIRM.
3. Cold weather function screen is displayed.
4. To switch Cold weather function ON/OFF press F1.
5. To alter the temperature at which heater switching function starts use F3 and
F4.
Cold weather function screen
Note:
• Range of outdoor ambient temperature is −15°C to −10°C (default −15°C).
• System shall automatically return to routine operation. This will happen
when the outdoor ambient temp rises above the selected temp for this
specific mode of operation.
<Room Temp Control (Heating)>
This function allows operational setting of flow temperature range from the Ecodan and
also the time interval at which the FTC4 collects and processes data for the auto adaptation mode.
1. From the Operation settings menu use F1 and F2 buttons to scroll through the list
until Room temp. control (Heating) is highlighted.
2. Press CONFIRM.
3. Use F1 and F2 keys to scroll through the menu selecting each subtitle in turn by
pressing CONFIRM. See the table below for description of each setting.
4. Enter the desired number using the function keys and press CONFIRM.
Room temp. control (Heating) screen
Menu subtitle
Temp. control interval
Flow temperature range
Minimum temp.
Maximum temp.
Heat pump thermo diff.adjust
On/Off
Lower limit
Upper limit
Function
Selectable according to the heat emitter type and the materials of floor (i.e. radiators, floor heating-thick, -thin concrete,
wood, etc.)
To minimize the loss by frequent ON and OFF in mild outdoor ambient temp. seasons.
To set max. possible flow temp according to the type of heat
emitters.
To minimize the loss by frequent ON and OFF in mild outdoor ambient temp. seasons.
Prohibits heat pump operation until the flow temperature
drops below the target flow temperature minus lower limit
value.
Allows heat pump operation until the flow temperature rises
above the target flow temperature plus upper limit value.
Range
10 - 60
Unit
mins.
Default
10
25 - 45
ºC
30
35 - 60
ºC
50
On/Off
—
On
−9 - −1
ºC
−5
+3 - +5
ºC
+5
*1 The minimum flow temperature that prohibits heat pump operation is 20ºC.
*2 The maximum flow temperature that allows heat pump operation equals to the maximum temperature set in the flow temp. range menu.
OCH532A
38
<Floor dry up function>
The Floor dry up function automatically changes the target hot water temperature
in stages to gradually dry concrete when this particular type of underfloor heating
system is installed.
1. Turn off the system using the main controller.
2. From the Operation settings in the service menu, use F1 and F2 buttons to
scroll through the list until Floor dry up function is highlighted.
3. Press CONFIRM to display the FLOOR DRY UP screen.
4. To change settings, press F4. For details on settings, refer to the table below.
5. To start the Floor dry up operation, press F1 button to check a box below
“Active” and press CONFIRM.
*1. Upon completion of the operation the system stops all the operations except
the Freeze stat. operation.
*2. For Floor dry up function, the target flow temp. of Zone1 is the same as that of
Zone2.
Note:
• This function is not available when a PUHZ-FRP outdoor unit is connected.
• Disconnect wiring to external inputs of room thermostat, demand control,
and outdoor thermostat, or the target flow temp. may not be maintained.
Target flow temp.
(°C)
(h)
(g) 45
(d)
(e)
40
35
(c)
(b)
30
(f)
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Days
Functions
Symbol
Floor dry up function
a
Flow temp. increase step
Increase interval
Flow temp. decrease step
Flow temp.
(decrease)
Decrease interval
Start & Finish
Target temperature Max. target temp.
Max. temp. period
b
c
d
e
f
g
h
Flow temp.
(increase)
Description
Set the function to ON and power on the system using the main
controller, and the dry up heating operation will start.
Sets the increase step of the target flow temp.
Sets the period for which the same target flow temp is maintained.
Sets the decrease step of the target flow temp.
Sets the period for which the same target flow temp is maintained.
Sets the target flow temp. at the start and the finish of the operation.
Sets the maximum target flow temp.
Sets the period for which the maximum target flow temp. is maintained.
Option/Range Unit
Default
On/Off
—
Off
+1 - +10
1-7
−1 - −10
1-7
25 - 60
25 - 60
1 - 20
ºC
day
ºC
day
ºC
ºC
day
+5
2
−5
2
30
45
5
External input settings
From the service menu use F1 and F2 buttons to highlight External input settings
then press CONFIRM.
<Demand control (IN4)>
1. From the External input settings menu highlight Demand control (IN4).
2. Press CONFIRM.
3. The Demand control screen is displayed.
External input settings menu screen
4. Press F3 button to select Heat source OFF or Boiler.
5. Press CONFIRM.
Note: The selection of “OFF”, whilst a signal is being sent to IN4, forcefully
stops all the heat source operations and the selection of “Boiler” stops
operations of heat pump and electric heater and performs boiler operation.
Demand control screen
<Outdoor thermostat (IN5)>
1. From the External input settings menu highlight Outdoor thermostat (IN5).
2. Press CONFIRM.
3. The Outdoor thermostat screen is displayed.
4. Press F3 button to select Heater or Boiler.
5. Press CONFIRM.
Note: The selection of “Heater”, whilst a signal is being sent to IN5, performs
electric-heater-only operation and the selection of “Boiler” performs
boiler operation.
Outdoor thermostat setting screen
OCH532A
39
Running information
This function shows current temperature and other data of main component parts
of both the indoor and outdoor units.
1. From the Service menu highlight Running information.
2. Press CONFIRM.
3. Press F3 and F4 buttons to set the Ref. address. *1
4. Use the function buttons to enter index code for the component to be viewed.
(See the Table 9-2-1 for component index codes.)
5. Press CONFIRM.
*1 For multiple outdoor units control system only.
Thermistor reading
This function shows the current readings of thermistors located on the water and refrigerant circuit
Thermistor Description
TH1A
Zone 1 room temperature
TH1B
Zone 2 room temperature
TH2
Refrigerant return temperature
THW1
Water flow temperature
THW2
Water return temperature
THW5
DHW tank water temperature
TH7
Ambient (outdoor) temperature
Thermistor Description
THW6
Zone 1 flow water temperature
THW7
Zone 1 return water temperature
THW8
Zone 2 flow water temperature
THW9
Zone 2 return water temperature
THWB1
Boiler flow water temperature
THWB2
Boiler return water temperature
Summary of settings
This function shows the current installer/user entered settings.
Abbreviation
HWtemp
HWdrop
HWtime
NO HW
HWset
Explanation
DHW max temp
DHW temperature drop
DHW max operation time
DHW mode restriction
DHW operation mode (Normal/Eco)
Ltemp
Lfreq
Lstart
Ltime
Lkeep
Legionella hot water temp
Legionella operation Frequency
Legionella mode start time
Legionella max. operation time
Duration of max (Legionella) hot
water temp
Z1 mode
Operation mode
- HER (Heating room temp)
- HE (Heating flow temp)
- HCC (Heating compensation curve)
- COR (—)
- CO (Cooling flow temp)
Abbreviation Explanation
Z2 mode
Operation mode
- HER (Heating room temp)
- HE (Heating flow temp)
- HCC (Heating compensation curve)
- COR (—)
- CO (Cooling flow temp)
Hroom 1
Heating target room temp
Hroom 2
Heating target room temp
Hflow 1
Heating target flow temp
Hflow 2
Heating target flow temp
Croom
—
Cflow
Cooling target flow temp
FSflow
Freeze stat function flow temp
FSout
Freeze stat function ambient temp
Error history
Error history allows the service engineer to view previous Error codes, the unit
address and the date on which they occurred. Up to 16 Error codes can be stored
in the history the most recent Error event is displayed at the top of the list.
1. From the service menu select Error history
2. Press CONFIRM.
Please see chapter 10-4. for error code diagnosis and actions.
To delete an Error history item;
1. From Error history screen press F4 button (Rubbish bin icon)
2. Then press F3 button (Yes).
OCH532A
40
Password protection
Password protection is available to prevent unauthorised access to the service
menu by untrained persons.
1. From the service menu use F1 and F2 buttons to scroll through list until Password protection is highlighted.
2. Press CONFIRM.
3. When password input screen is displayed use buttons F1 and F2 to move left
and right between the four digits, F3 to lower the selected digit by 1, and F4 to
increase the selected digit by 1.
4. When you have input your password press CONFIRM.
Password input screen
5. The password verify screen is displayed.
6. To verify your new password press button F3.
7. Your password is now set and the completion screen is displayed.
Password verify screen
<Resetting the password>
If you forget the password you entered, or have to service a unit somebody else
installed, you can reset the password to the factory default of 0000.
1. From the main settings menu scroll down the functions until Service Menu is
highlighted.
2. Press CONFIRM.
3. You will be prompted to enter a password.
4. Hold down buttons F3 and F4 together for 3 secs
5. You will be asked if you wish to continue and reset the password to default setting.
6. To reset press button F3.
7. The password is now reset to 0000.
Manual reset
Should you wish to restore the factory settings at any time you should use the
manual reset function. Please note this will reset ALL functions to the factory default settings.
1. From the service menu use F1 and F2 buttons to scroll through list until Manual
Reset is highlighted.
2. Press CONFIRM.
3. The Manual reset screen is displayed.
4. Choose either Manual Reset for FTC4 or Main Controller.
5. Press F3 button to confirm manual reset of chosen device.
OCH532A
41
Completion screen
SD card
The use of an SD memory card simplifies the main controller settings in the field.
*Ecodan service tool (for use with PC tool) is necessary for the setting.
<SD Main RC>
1. From the SD card setting use F1 and F2 buttons to scroll through list until
“SD
Main RC” is highlighted.
2. Press CONFIRM.
3. Press F3 and F4 buttons to set the Ref. address. *1
4. Use F1, F2 and F3 buttons to select a menu to write to the main controller.
5. Press CONFIRM to start downloading.
6. Wait for a few minutes until “Complete!” appears.
*1 For multiple outdoor units control system only.
<Main RC
SD>
1. From the SD card setting use F1 and F2 buttons to scroll through list until
Main RC SD is highlighted.
2. Press CONFIRM.
3. Press F3 and F4 buttons to set the Ref. address. *1
4. Use F1, F2 and F3 buttons to select a menu to write to the SD memory card.
5. Press CONFIRM to start uploading.
6. Wait for a few minutes until “Complete!” appears.
*1 For multiple outdoor units control system only.
OCH532A
42
<Table 9-2-1>
Request
code
103
104
105
154
156
157
162
163
164
165
175
176
177
190
191
340
342
343
504
505
506
507
508
509
510
511
512
513
514
515
516
Request content
Error history 1 (latest)
Error history 2 (second to last)
Error history 3 (third to last)
Water circulation pump 1 - Accumulated operating time (after reset)
Water circulation pump 2 - Accumulated operating time (after reset)
Water circulation pump 3 - Accumulated operating time (after reset)
Indoor unit - Dip SW1 setting information
Indoor unit - Dip SW2 setting information
Indoor unit - Dip SW3 setting information
Indoor unit - Dip SW4 setting information
Indoor unit - Output signal information
Indoor unit - Input signal information
Mixing valve opening step
Indoor unit - Software version 1st 4 digits
Indoor unit - Software version last 4 digits
Water circulation pump 1 - Accumulated operating time reset
Water circulation pump 2 - Accumulated operating time reset
Water circulation pump 3 - Accumulated operating time reset
Indoor unit - Zone 1 room temp. (TH1A)
Indoor unit - Ref. liquid temp. (TH2)
Indoor unit - Return water temp. (THW2)
Indoor unit - Zone 2 room temp. (TH1B)
Indoor unit - DHW tank water temp. (THW5)
Indoor unit - Zone 1 flow water temp. (THW6)
Indoor unit - Outside air temp. (TH7)
Indoor unit - Flow water temp. (THW1)
Indoor unit - Zone 1 return water temp. (THW7)
Indoor unit - Zone 2 flow water temp. (THW8)
Indoor unit - Zone 2 return water temp. (THW9)
Indoor unit - Boiler flow water temp. (THWB1)
Indoor unit - Boiler return water temp. (THWB2)
550
Indoor unit - Error postponement history 1 (latest)
551
Indoor unit - Operation control at time of error
Indoor unit - Operation mode at time of error
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
Indoor unit - Output signal information at time of error
Indoor unit - Input signal information at time of error
Indoor unit - Zone 1 room temp. (TH1A) at time of error
Indoor unit - Zone 2 room temp. (TH1B) at time of error
Indoor unit - Ref. liquid temp. (TH2) at time of error
Indoor unit - Flow water temp. (THW1) at time of error
Indoor unit - Return water temp. (THW2) at time of error
Indoor unit - DHW tank water temp. (THW5) at time of error
Indoor unit - Zone 1 flow water temp. (THW6) at time of error
Indoor unit - Zone 1 return water temp. (THW7) at time of error
Indoor unit - Zone 2 flow water temp. (THW8) at time of error
Indoor unit - Zone 2 return water temp. (THW9) at time of error
Indoor unit - Boiler flow water temp. (THWB1) at time of error
Indoor unit - Boiler return water temp. (THWB2) at time of error
Indoor unit - Failure (P1/P2/L5/L8/Ld) thermistor
567
568
569
Mixing valve opening step at time of error
Operated Flow switch at time of failure (L9)
Range
Unit
Displays error history. ("– –" is displays if no history is present.)
Displays error history. ("– –" is displays if no history is present.)
Displays error history. ("– –" is displays if no history is present.)
0 - 9999
0 - 9999
0 - 9999
Refer to detail contents described hereinafter.
Refer to detail contents described hereinafter.
Refer to detail contents described hereinafter.
Refer to detail contents described hereinafter.
Refer to detail contents described hereinafter.
Refer to detail contents described hereinafter.
0 - 10
Refer to Note below.
Refer to Note below.
—
—
—
–39 - 88
–39 - 88
–39 - 88
–39 - 88
–39 - 88
–39 - 88
–39 - 88
–39 - 88
–39 - 88
–39 - 88
–39 - 88
–40 - 140
–40 - 140
Displays postponement code.
("– –" is displays if no postponement code is present.)
0 Standard, 1 Heater, 2 Boiler
0 OFF, 1 DHW, 2 Heating, 3 Cooling 4, Legionella prevention,
5 Freeze protection, 6 Operation stop
Refer to detail contents described hereinafter
Refer to detail contents described hereinafter
–39 - 88
–39 - 88
–39 - 88
–39 - 88
–39 - 88
–39 - 88
–39 - 88
–39 - 88
–39 - 88
–39 - 88
–40 - 140
–40 - 140
0 Failure thermistor is none, 1 TH1A, 2 TH2, 3 THW1, 4 THW2,
5 THWB1, 6 THW5, 7 THWB2, 8 TH1B, A THW6, B THW7,
C THW8, D THW9
0 - 10
0 No operated flow switch, 1 Flow switch 1, 2 Flow switch 2,
3 Flow switch 3
Code
—
—
10 hours
10 hours
10 hours
—
—
—
—
—
—
Step
—
—
—
—
—
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
Note
Refer to outdoor unit service manual for request code 0 to 102, 106 to 149.
Request codes 103 to 105 indicate error histories of both indoor and outdoor units.
As only four digits can be displayed at one time the software version number is displayed in two halves.
Enter code 190 to see the first four digits and code 191 to see the last four digits.
For example software version No. 5.01 A000, when code 190 is entered 0501 is displayed, when code 191 is entered A000 is displayed.
OCH532A
43
—
—
—
—
—
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
—
Step
—
Indoor unit switch setting display (Request code: 162 to 165)
0: OFF
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1: ON
2
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0: OFF
SW1, SW2, SW3, SW4
3
4
5
6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
1
1
0
1
1
1
0
1
1
1
0
1
1
1
0
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
0
1
1
1
0
1
1
1
0
1
1
1
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
1
0
1
1
1
0
1
1
1
0
1
1
1
0
1
1
0
1
1
1
0
1
1
1
0
1
1
1
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
OCH532A
7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
8
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Display
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
00 00
00 01
00 02
00 03
00 04
00 05
00 06
00 07
00 08
00 09
00 0A
00 0B
00 0C
00 0D
00 0E
00 0F
00 10
00 11
00 12
00 13
00 14
00 15
00 16
00 17
00 18
00 19
00 1A
00 1B
00 1C
00 1D
00 1E
00 1F
00 20
00 21
00 22
00 23
00 24
00 25
00 26
00 27
00 28
00 29
00 2A
00 2B
00 2C
00 2D
00 2E
00 2F
00 30
00 31
00 32
00 33
00 34
00 35
00 36
00 37
00 38
00 39
00 3A
00 3B
00 3C
00 3D
00 3E
00 3F
44
1: ON
2
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
SW1, SW2, SW3, SW4
3
4
5
6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
1
1
0
1
1
1
0
1
1
1
0
1
1
1
0
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
0
1
1
1
0
1
1
1
0
1
1
1
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
1
0
1
1
1
0
1
1
1
0
1
1
1
0
1
1
0
1
1
1
0
1
1
1
0
1
1
1
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
7
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
8
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Display
00 40
00 41
00 42
00 43
00 44
00 45
00 46
00 47
00 48
00 49
00 4A
00 4B
00 4C
00 4D
00 4E
00 4F
00 50
00 51
00 52
00 53
00 54
00 55
00 56
00 57
00 58
00 59
00 5A
00 5B
00 5C
00 5D
00 5E
00 5F
00 60
00 61
00 62
00 63
00 64
00 65
00 66
00 67
00 68
00 69
00 6A
00 6B
00 6C
00 6D
00 6E
00 6F
00 70
00 71
00 72
00 73
00 74
00 75
00 76
00 77
00 78
00 79
00 7A
00 7B
00 7C
00 7D
00 7E
00 7F
Indoor unit switch setting display (Request code: 162 to 165)
0: OFF
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1: ON
2
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0: OFF
SW1, SW2, SW3, SW4
3
4
5
6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
1
1
0
1
1
1
0
1
1
1
0
1
1
1
0
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
0
1
1
1
0
1
1
1
0
1
1
1
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
1
0
1
1
1
0
1
1
1
0
1
1
1
0
1
1
0
1
1
1
0
1
1
1
0
1
1
1
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
OCH532A
7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
8
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Display
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
00 80
00 81
00 82
00 83
00 84
00 85
00 86
00 87
00 88
00 89
00 8A
00 8B
00 8C
00 8D
00 8E
00 8F
00 90
00 91
00 92
00 93
00 94
00 95
00 96
00 97
00 98
00 99
00 9A
00 9B
00 9C
00 9D
00 9E
00 9F
00 A0
00 A1
00 A2
00 A3
00 A4
00 A5
00 A6
00 A7
00 A8
00 A9
00 AA
00 AB
00 AC
00 AD
00 AE
00 AF
00 B0
00 B1
00 B2
00 B3
00 B4
00 B5
00 B6
00 B7
00 B8
00 B9
00 BA
00 BB
00 BC
00 BD
00 BE
00 BF
45
1: ON
2
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
SW1, SW2, SW3, SW4
3
4
5
6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
1
1
0
1
1
1
0
1
1
1
0
1
1
1
0
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
0
1
1
1
0
1
1
1
0
1
1
1
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
1
0
1
1
1
0
1
1
1
0
1
1
1
0
1
1
0
1
1
1
0
1
1
1
0
1
1
1
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
7
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
8
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Display
00 C0
00 C1
00 C2
00 C3
00 C4
00 C5
00 C6
00 C7
00 C8
00 C9
00 CA
00 CB
00 CC
00 CD
00 CE
00 CF
00 D0
00 D1
00 D2
00 D3
00 D4
00 D5
00 D6
00 D7
00 D8
00 D9
00 DA
00 DB
00 DC
00 DD
00 DE
00 DF
00 E0
00 E1
00 E2
00 E3
00 E4
00 E5
00 E6
00 E7
00 E8
00 E9
00 EA
00 EB
00 EC
00 ED
00 EE
00 EF
00 F0
00 F1
00 F2
00 F3
00 F4
00 F5
00 F6
00 F7
00 F8
00 F9
00 FA
00 FB
00 FC
00 FD
00 FE
00 FF
Output signal display (Request code: 175/553)
Please refer to Table 2 on relevant wiring diagram whilst using the following.
0: OFF
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0: OFF
1: ON
2
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
3
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
OUT
4
5A
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
OCH532A
5B
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Display
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
xx 00
xx 01
xx 02
xx 03
xx 04
xx 05
xx 06
xx 07
xx 08
xx 09
xx 0A
xx 0B
xx 0C
xx 0D
xx 0E
xx 0F
xx 10
xx 11
xx 12
xx 13
xx 14
xx 15
xx 16
xx 17
xx 18
xx 19
xx 1A
xx 1B
xx 1C
xx 1D
xx 1E
xx 1F
xx 20
xx 21
xx 22
xx 23
xx 24
xx 25
xx 26
xx 27
xx 28
xx 29
xx 2A
xx 2B
xx 2C
xx 2D
xx 2E
xx 2F
xx 30
xx 31
xx 32
xx 33
xx 34
xx 35
xx 36
xx 37
xx 38
xx 39
xx 3A
xx 3B
xx 3C
xx 3D
xx 3E
xx 3F
46
1: ON
2
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
3
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
4
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
OUT
5A
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
5B
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
6
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Display
xx 40
xx 41
xx 42
xx 43
xx 44
xx 45
xx 46
xx 47
xx 48
xx 49
xx 4A
xx 4B
xx 4C
xx 4D
xx 4E
xx 4F
xx 50
xx 51
xx 52
xx 53
xx 54
xx 55
xx 56
xx 57
xx 58
xx 59
xx 5A
xx 5B
xx 5C
xx 5D
xx 5E
xx 5F
xx 60
xx 61
xx 62
xx 63
xx 64
xx 65
xx 66
xx 67
xx 68
xx 69
xx 6A
xx 6B
xx 6C
xx 6D
xx 6E
xx 6F
xx 70
xx 71
xx 72
xx 73
xx 74
xx 75
xx 76
xx 77
xx 78
xx 79
xx 7A
xx 7B
xx 7C
xx 7D
xx 7E
xx 7F
Output signal display (Request code: 175/553)
Please refer to Table 2 on relevant wiring diagram whilst using the following.
0: OFF
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0: OFF
1: ON
2
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
3
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
OCH532A
OUT
4
5A
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
5B
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
7
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Display
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
xx 80
xx 81
xx 82
xx 83
xx 84
xx 85
xx 86
xx 87
xx 88
xx 89
xx 8A
xx 8B
xx 8C
xx 8D
xx 8E
xx 8F
xx 90
xx 91
xx 92
xx 93
xx 94
xx 95
xx 96
xx 97
xx 98
xx 99
xx 9A
xx 9B
xx 9C
xx 9D
xx 9E
xx 9F
xx A0
xx A1
xx A2
xx A3
xx A4
xx A5
xx A6
xx A7
xx A8
xx A9
xx AA
xx AB
xx AC
xx AD
xx AE
xx AF
xx B0
xx B1
xx B2
xx B3
xx B4
xx B5
xx B6
xx B7
xx B8
xx B9
xx BA
xx BB
xx BC
xx BD
xx BE
xx BF
47
1: ON
2
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
3
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
4
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
OUT
5A
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
5B
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
6
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
7
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Display
xx C0
xx C1
xx C2
xx C3
xx C4
xx C5
xx C6
xx C7
xx C8
xx C9
xx CA
xx CB
xx CC
xx CD
xx CE
xx CF
xx D0
xx D1
xx D2
xx D3
xx D4
xx D5
xx D6
xx D7
xx D8
xx D9
xx DA
xx DB
xx DC
xx DD
xx DE
xx DF
xx E0
xx E1
xx E2
xx E3
xx E4
xx E5
xx E6
xx E7
xx E8
xx E9
xx EA
xx EB
xx EC
xx ED
xx EE
xx EF
xx F0
xx F1
xx F2
xx F3
xx F4
xx F5
xx F6
xx F7
xx F8
xx F9
xx FA
xx FB
xx FC
xx FD
xx FE
xx FF
Output signal display (Request code: 175/553)
Please refer to Table 2 on relevant wiring diagram whilst using the following.
0: OFF
1: ON
OUT
8
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
9
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
10
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
11
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
12
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
OCH532A
13
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
14
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
15
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Display
00 xx
01 xx
02 xx
03 xx
04 xx
05 xx
06 xx
07 xx
08 xx
09 xx
0A xx
0B xx
0C xx
0D xx
0E xx
0F xx
10 xx
11 xx
12 xx
13 xx
14 xx
15 xx
16 xx
17 xx
18 xx
19 xx
1A xx
1B xx
1C xx
1D xx
1E xx
1F xx
20 xx
21 xx
22 xx
23 xx
24 xx
25 xx
26 xx
27 xx
28 xx
29 xx
2A xx
2B xx
2C xx
2D xx
2E xx
2F xx
30 xx
31 xx
32 xx
33 xx
34 xx
35 xx
36 xx
37 xx
38 xx
39 xx
3A xx
3B xx
3C xx
3D xx
3E xx
3F xx
Mixing valve state
OUT
5A
5B
0
0
0
1
1
0
1
1
48
Mixing valve state
Stop
Stop
Open
Close
Input signal display (Request code: 176/554)
Please refer to Table 1 on relevant wiring diagram whilst using the following.
0: OFF (open)
1: ON (short)
0: OFF (open)
IN
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
2
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
3
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
OCH532A
4
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
8
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1: ON (short)
IN
Display
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
00 00
00 01
00 02
00 03
00 04
00 05
00 06
00 07
00 08
00 09
00 0A
00 0B
00 0C
00 0D
00 0E
00 0F
00 10
00 11
00 12
00 13
00 14
00 15
00 16
00 17
00 18
00 19
00 1A
00 1B
00 1C
00 1D
00 1E
00 1F
00 20
00 21
00 22
00 23
00 24
00 25
00 26
00 27
00 28
00 29
00 2A
00 2B
00 2C
00 2D
00 2E
00 2F
00 30
00 31
00 32
00 33
00 34
00 35
00 36
00 37
00 38
00 39
00 3A
00 3B
00 3C
00 3D
00 3E
00 3F
49
2
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
3
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
4
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
7
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
8
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Display
00 40
00 41
00 42
00 43
00 44
00 45
00 46
00 47
00 48
00 49
00 4A
00 4B
00 4C
00 4D
00 4E
00 4F
00 50
00 51
00 52
00 53
00 54
00 55
00 56
00 57
00 58
00 59
00 5A
00 5B
00 5C
00 5D
00 5E
00 5F
00 60
00 61
00 62
00 63
00 64
00 65
00 66
00 67
00 68
00 69
00 6A
00 6B
00 6C
00 6D
00 6E
00 6F
00 70
00 71
00 72
00 73
00 74
00 75
00 76
00 77
00 78
00 79
00 7A
00 7B
00 7C
00 7D
00 7E
00 7F
<Emergency operation (Heater)>
In Emergency operation mode the outdoor heat pump unit will not operate. Heating for DHW and space heating is provided by the booster heater and the tank
immersion heater (if installed). Space heating flow temp is restricted 40°C if an
immersion heater is not present on the DHW tank then the booster heater will
also indirectly heat the DHW.
When in Emergency operation the main control has NO control functions. It's only
function is to display the Main screen and Information screen by pressing F1, all
other buttons are disabled.
• Activating Emergency operation mode
To activate Emergency operation see the following:
1. Switch OFF the breaker for the outdoor unit (or both breakers if cylinder powered independently).
2. Change DIP switch SW4-5 to ON.
3. Switch ON the breaker(s).
4. Emergency Operation is now activated.
F1
F2
F3
F4
F1
F2
F3
F4
• Deactivating Emergency operation mode
To deactivate Emergency operation see the following:
1. Switch OFF the breaker for the outdoor unit (or both breakers if cylinder powered independently).
2. Change DIP switch SW4-5 to OFF.
3. Switch ON the breaker(s).
4. Emergency operation is now deactivated.
<Emergency operation (Boiler)>
In Emergency operation mode the outdoor heat pump unit will not operate. Heating for space heating is provided by the boiler.
When in Emergency operation the main control has NO control functions. It's only
function is to display the Main screen and Information screen by pressing F1, all
other buttons are disabled.
• Activating Emergency operation mode
To activate Emergency operation see the following:
1. Switch OFF the breaker for the outdoor unit (or both breakers if cylinder powered independently).
2. Change DIP switch SW4-6 to ON.
3. Switch ON the breaker(s).
4. Emergency Operation is now activated.
• Deactivating Emergency operation mode
To deactivate Emergency operation see the following:
1. Switch OFF the breaker for the outdoor unit (or both breakers if cylinder powered independently).
2. Change DIP switch SW4-6 to OFF.
3. Switch ON the breaker(s).
4. Emergency operation is now deactivated.
WARNING
Do not attempt to change the DIP switches whilst the breaker(s) are ON as
this could result in ELECTROCUTION.
OCH532A
50
10
TROUBLESHOOTING
10-1. Troubleshooting
<Summary of self diagnosis based on Error Codes and Service Procedures>
Present and past Error codes are logged and displayed on the main controller or control board of the outdoor unit.
Please refer to the table below and subsequent explanations to diagnose and remedy typical problems that may occur in the field.
Unit Condition
Reoccurring problem
Error Code
Displayed
Not Displayed
Non reoccurring problem
Action
Use table 10-4. "Self diagnosis and action" to identify fault and correct.
Use table 10-5. "Troubleshooting by inferior phenomena" to identify fault and correct.
Logged
1. Check temporary causes of defects such as the operation of safety devices on the refrigerant/water circuit including compressor, poor wiring, electrical noise etc. Re-check
the symptom and the installation environment, refrigerant amount (Split systems only),
weather conditions at time of fault etc.
2. Reset Error code logs, Service the unit and restart system.
Not Logged
1. Recheck the abnormal symptom
2. Identify cause of problem and take corrective action according to Table 10-5. "Troubleshooting by inferior phenomena"
3. If no obvious problem can be found continue to operate the unit.
NOTE
Electrical components should only be replaced as a final option. Please follow instructions in Tables 10-4. and 10-5. Error Codes and Inferior Phenomena fully before resorting to replacing parts.
10-2. Test Run
Before a test run
• After installation of outdoor unit, pipework and electrical wiring, recheck that there is no water leakage, loosened connections or miswiring.
• Measure impedance between the ground and the power supply terminal block (L,N) on the outdoor and indoor units with suitable (500V) ohmmeter. Resistance
should be ≥ 1.0MΩ .
• Read the Installation and Operation Manuals fully especially the safety requirements before carrying out any test runs.
10-3. Malfunction diagnosis method by main controller
If during start up or operation a malfunction occurs the error code screen may be displayed on the main controller.
The error code screen shows the following; code, unit, ref. address, and telephone number of installer (only if previously entered by the installer)
Please not in the case of some malfunctions an error code is not generated please refer to table 10-5. for more details.
To reset
1. To reset the main controller press F4 button (Reset).
2. Then press F3 (Yes) to confirm.
OCH532A
51
10-4. Self diagnosis and action
Check if Dip SW is set correctly. (Refer to Chapter 6-11.)
Error code
L3
Title and display conditions
Circulation water temperature overheat
protection
<DHW/Heating/Cooling/LP/FS/OS>
Error code displayed when THW1 detects a
temp. ≥ 80ºC for 10 consecutive seconds or
THW2 detects a temp. ≥ 80ºC for 10 consecutive
seconds.
DHW
Heating
Cooling
LP
FS
OS
TH1A/B
TH2
THW1
THW2
THW5
THW6
THW7
THW8
THW9
THWB1
THWB2
L4
: Domestic hot water mode
: Heating mode
: Cooling mode
: Legionella prevention mode
: Freeze stat
: Operation stop
: Room temp. thermistor
: Liquid refrigerant temp. thermistor
: Flow water temp. thermistor
: Return water temp. thermistor
: Tank water temp. thermistor
: Zone 1 flow water temperature thermistor
: Zone 1 return water temperature thermistor
: Zone 2 flow water temperature thermistor
: Zone 2 return water temperature thermistor
: Boiler flow water temperature thermistor
: Boiler return water temperature thermistor
Tank water temperature overheat protection
<DHW/Heating/Cooling/LP/FS/OS>
Error code display when THW5 detects a
temp. ≥ 75ºC for 10 consecutive seconds.
OCH532A
Possible Cause
Diagnosis and action
1.
Insufficient system head
1.
Refer to table in section 10-6. to determine if
system pump meets requirements.
If more head required either add an pump of
the same size or replace existing pump with
capacity model.
See 11. DISASSEMBLY PROCEDURE for
how to replace pump.
2.
Reduced flow in primary water circuit
Due to 1 or more of the following;
Faulty pump, insufficient air purge,
blockedstrainer, leak in water circuit.
2.
Check circulation pump (See 10-6. for how
to check).
Open purge valve to remove trapped air.
Check the strainer for blockages.
Check the primary water circuit for leaks.
Check that the flow amount is within the recommended range.
3.
Valve operation fault
3.
Check valves on primary water circuit are
installed level.
4.
2-way valve (field supply) actuator
fault
4.
Electrically test to determine fault.
5.
3-way valve actuator fault
5.
1) Electrically test to determine fault.
2) Operate 3-way valve manually using the
main remote controller. (Refer to <Manual
operation> in 9.2).
3) Replace 3-way valve coil.
4) Replace 3-way valve. (Refer to Procedure
6 in “11. DISASSEMBLY PROCEDURE.”
6.
Booster heater relay (BHC1, BHC2,
BHCP) operating fault
6.
7.
Power supply voltage increase
7.
Electrically test the relays (BHC1, BHC2,
BHCP) to determine fault.
See 10-6. for how to check.
Check the supply voltage.
8.
THW1 or THW5 has become detached from its holder.
8.
Visually inspect location and reattach as
necessary.
9.
THW1 or THW2 fault
9.
Check resistance of thermistor against table
in section 10-6.
Compare FTC4 detected temperature to
hand held detector.
10.
FTC4 board failure
10.
Replace board.
1.
3-way valve actuator fault
1.
1) Electrically test to determine fault.
2) Operate 3-way valve manually using the
main remote controller. (Refer to <Manual
operation> in 9.2).
3) Replace 3-way valve coil.
4) Replace 3-way valve. (Refer to Procedure
6 in “11. DISASSEMBLY PROCEDURE.”
2.
Immersion heater relay (IHC) operating fault
2.
Check immersion heater relay (IHC)
3.
THW5 fault
3.
Check resistance of thermistor against table
in section 10-6.
Compare FTC4 detected temperature to
hand held detector.
4.
FTC4 board failure
4.
Replace board.
52
Error code
Title and display conditions
P1/P2/L5/LD
Indoor unit temperature thermistor failure
* The thermistors subject to failure can be
checked in “Request code: 567” in “Running
information
<DHW/Heating/Cooling/LP/FS/OS>
Error code displayed when thermistor is at open
or short (see table).
Exceptions
Error code will not be displayed for TH2; During
defrost and for 10 mins after defrost operation.
Possible Cause
Connector/terminal wire has become
detached or loose wiring.
1.
Visually check the terminals and connections and reattachas appropriate.
2.
Thermistor fault
2.
3.
FTC4 board failure
3.
Check resistance of thermistor against table in section 10-6.
Compare FTC4 detected temperature to
hand held detector.
Replace board.
4.
The thermistor on the wireless remote
controller or the main remote controller may be defective. (when Room
temp. is chosen for the Heating operation and when Main Controller or
Room RC 1-8 is chosen for the Room
Sensor setting in the Initial setting)
Incorrect setting of the Dip switch(es)
4.
Replace wireless remote controller or main
remote controller
5.
Check the Dip switch setting(s).
5.
Error code
P1
P2
L5
LD
L6
Symbol
TH1A/TH1B
TH2
THW1
THW2
THW5
THW6
THW7
THW8
THW9
THWB1
THWB2
Thermistor
Name
Room temperature thermistor
Liquid temperature thermistor
Flow water temperature thermistor
Return water temperature thermistor
Tank water temperature thermistor
Zone 1 flow water temperature thermistor
Zone 1 return water temperature thermistor
Zone 2 flow water temperature thermistor
Zone 2 return water temperature thermistor
Boiler flow water temperature thermistor
Boiler return water temperature thermistor
Circulation water freeze protection
<DHW/Heating/Cooling/LP/FS/OS>
Error code displayed when THW1 detects a
temp. ≤ 1ºC for 10 consecutive seconds or
THW2 detects a temp. ≤ 3ºC for 10 consecutive
seconds.
Exception
Error code will not be displayed if;
FS function is disabled,
For 10 mins after water circulation pump1 is
switched on.
Open detection
Short detection
-39ºC or below
-39ºC or below
-39ºC or below
-39ºC or below
-39ºC or below
-39ºC or below
-39ºC or below
-39ºC or below
-39ºC or below
-40ºC or below
-40ºC or below
88.5ºC or above
88.5ºC or above
88.5ºC or above
88.5ºC or above
88.5ºC or above
88.5ºC or above
88.5ºC or above
88.5ºC or above
88.5ºC or above
140ºC or above
140ºC or above
1. Insufficient system head
2. Reduced flow in primary water circuit.
Due to 1 or more of the following;
Faulty pump, insufficient air purge,
blockedstrainer, leak in water circuit.
3. Valve operation fault
1. Refer to table in section 10-6. to determine
if system pump meets requirements.
If more head required either add an pump
of the same size or replace existing pump
with capacity model.
See 11. DISASSEMBLY PROCEDURE for
how to replace pump.
2. Check circulation pump (See 10-6. for how
to check).
Open purge valve to remove trapped air.
Check the strainer for blockages.
Check the primary water circuit for leaks.
Check that the flow amount is within the
recommended range.
3. Check valves on primary water circuit are
installed level.
4. 2-way valve (field supply) actuator fault
4. Electrically test to determine fault.
5. 3-way valve actuator fault
5. 1) Electrically test to determine fault.
2) Operate 3-way valve manually using the
main remote controller. (Refer to <Manual operation> in 9.2).
3) Replace 3-way valve coil.
4) Replace 3-way valve. (Refer to Procedure
6 in “11. DISASSEMBLY PROCEDURE.”
6. Visually inspect location and reattach as
necessary.
6. THW1 has become detached from its
holder.
7. THW1 or THW2 fault
8. FTC4 board failure
OCH532A
Diagnosis and action
1.
53
7. Check resistance of thermistor against table
in section 10-6.
Compare FTC4 detected temperature to
hand held detector.
8. Replace board.
Error code
Title and display conditions
L8
Heating operation error
* “3” is displayed in “Request code: 567” in “Running information”.
<Heating/FS>
If a), b) and c) occur, L8 is displayed;
a) No change on THW1 and THW5
(under 1 °C for 20 minutes from unit starts
operation)
b) No change on THW1
(under 1 °C for 10 minutes from booster heater
starts operation)
c) THW1 - THW2 < -5 °C
(for 10 minutes continuously)
1.
THW1 has become detached from its
holder.
1.
Visually inspect location and reattach as
necessary.
2.
Booster heater fault
2.
Electrically test to determine fault.
See 10-6. for how to check.
3.
THW1 or THW2 or THW5 fault
3.
4.
FTC4 board failure
4.
Check resistance of thermistor against
table in section 10-6.
Compare FTC4 detected temperature to
hand held detector.
Replace board.
Heating operation error
* “A” is displayed in “Request code: 567” in
“Running information”.
1.
THW6 has become detached from its
holder.
1.
Visually inspect location and reattach as
necessary.
2.
THW6 or THW7 fault
2.
3.
FTC4 board failure
3.
Check resistance of thermistor against
table in section 10-6.
Compare FTC4 detected temperature to
hand held detector.
Replace board.
Heating operation error
* “C” is displayed in “Request code: 567” in
“Running information”.
1.
THW8 has become detached from its
holder.
1.
Visually inspect location and reattach as
necessary.
2.
THW8 or THW9 fault
2.
3.
FTC4 board failure
3.
Check resistance of thermistor against
table in section 10-6.
Compare FTC4 detected temperature to
hand held detector.
Replace board.
Low primary circuit (Heat source side) flow
rate detected by flow switch
* “1” is displayed in “Request code: 569” in “Running information”.
<DHW/Heating/Cooling/LP/FS>
Error code displayed when flow switch detects
low flow rate for 10 seconds.
1.
Insufficient system head
1.
2.
Reduced flow in primary water circuit
Due to 1 or more of the following;
Faulty pump, insufficient air purge,
blocked strainer, leak in water circuit.
2.
3.
Valve operation fault
3.
4.
2-way valve (field supply) actuator fault
4.
Electrically test to determine fault.
5.
Connector/terminal wire has become
detached or loose wiring.
5.
Visually check the CN2F connector and
IN2 terminal and reattach if necessary.
6.
Flow switch fault
6.
Electrically test to determine fault.
See 10-6. for how to check.
7.
Incorrect setting of the SW2-2
7. Check the SW2-2 setting.
8.
FTC4 board failure
8.
Replace board.
1.
Insufficient system head
1.
If more head required either add an pump
of the same size or replace existing pump.
2.
Reduced flow in primary water circuit
Due to 1 or more of the following;
Faulty pump, insufficient air purge,
blocked strainer, leak in water circuit.
2.
3.
Terminal wire has become detached
or loose wiring.
3.
Check circulation pump (See 10-6. for how
to check).
Open purge valve to remove trapped air.
Check the strainer for blockages.
Check the primary water circuit for leaks.
Check that the flow amount is within the
recommended range.
Visually check the IN3 terminal and reattach if necessary.
4.
Flow switch fault
4.
5.
Incorrect setting of the SW3-2
5.
Check the SW3-2 setting.
6.
FTC4 board failure
6.
Replace board.
L9
Possible Cause
Exception
For 1 min after water circulation pump1 is
switched on.
Low primary circuit (Zone1 side) flow rate
detected by flow switch
* “2” is displayed in “Request code: 569” in “Running information”.
OCH532A
54
Diagnosis and action
Refer to table in section 10-6. to determine
if system pump meets requirements.
If more head required either add an pump
of the same size or replace existing pump
with capacity model.
See 11. DISASSEMBLY PROCEDURE for
how to replace pump.
Check circulation pump (See 10-6. for how
to check).
Open purge valve to remove trapped air.
Check the strainer for blockages.
Check the primary water circuit for leaks.
Check that the flow amount is within the
recommended range.
Check valves on primary water circuit are
installed level.
Electrically test to determine fault.
Error code
Title and display conditions
L9
Low primary circuit (Zone2 side) flow rate
detected by flow switch
* “3” is displayed in “Request code: 569” in “Running information”.
Possible Cause
Diagnosis and action
1.
Insufficient system head
1.
If more head required either add an pump
of the same size or replace existing pump.
Check circulation pump (See 10-6. for how
to check).
Open purge valve to remove trapped air.
Check the strainer for blockages.
Check the primary water circuit for leaks.
Check that the flow amount is within the
recommended range.
Visually check the IN7 terminal and reattach if necessary.
2.
Reduced flow in primary water circuit
Due to 1 or more of the following;
Faulty pump, insufficient air purge,
blocked strainer, leak in water circuit.
2.
3.
Terminal wire has become detached
or loose wiring.
3.
4.
Flow switch fault
4.
5.
Incorrect setting of the SW3-3
5.
Check the SW3-3 setting.
6.
FTC4 board failure
6.
Replace board.
Electrically test to determine fault.
LC
Boiler circulation water temperature overheat
protection
<DHW/Heating/LP/FS/OS>
Error code displayed when THWB1 detects
a temp. ≥80ºC for 10 consecutive seconds or
THWB2 detects a temp. ≥80ºC for 10 consecutive seconds
LD
Boiler temperature thermistor (THWB1, THWB2)
Refer to error codes (P1/P2/L5/LD).
failure
Boiler operation error
1. THW6 has become detached from its
1. Visually inspect location and reattach as
<Heating>
holder.
necessary.
Boiler is running and THW6 detects a
2. Incorrect wiring between FTC4
2. See the manual of the thermistors "PACtemperature <30ºC for consecutive 60 minutes.
(OUT10) and the boiler.
TH011HT-E".
LE
LH
LL
1. The set temperature for Boiler is too
high.
1. Check if the set temperature for Boiler
for heating exceeds the restriction. (See
the manual for the thermistors "PACTH011HT-E")
2. Flow rate of the heating circuit from the 2. Check for
boiler may be reduced.
• water leakage
• strainer blockage
• water circulation pump function.
3. Boiler fuel has run out or the system is
OFF.
3.
Check the status of the boiler.
4. Boiler failure
4.
Check the status of the boiler.
5. FTC4 board failure
5.
Replace board.
Boiler circulation water freeze protection
Flow rate of the heating circuit from the Check for
boiler may be reduced.
• water leakage
• strainer blockage
• water circulation pump function.
Setting errors of Dip switches on FTC4 control Incorrect setting of Dip switches.
board
1. Boiler operation
1. For boiler operation, check that Dip SW1-1
is set to ON (With Boiler) and Dip SW2-6 is
set to ON (With Mixing Tank).
2. 2-zone temperature control
2. For 2-zone temperature control, check Dip
SW2-7 is set to ON (2-zone) and Dip SW2-6
is set to ON (With Mixing Tank).
3. Multiple outdoor units control
P1
3. For multiple outdoor units control, check Dip
SW1-3 is set to ON on FTC (slave) that runs
DHW operation .
Refer to error codes (P1/P2/L5/LD).
Indoor unit temperature thermistor (TH1A/TH1B)
failure
P2
Indoor unit temperature thermistor (TH2) failure
P6
Anti-freeze protection of plate heat exchanger
<Cooling>
<Cooling>
1. Reduced water flow
The error code displayed when Ref. liquid temp.
• Clogged filter
(TH2) stays at -5ºC or lower for 10 seconds after
• Leakage of water
compressor operates for 6 minutes.
2. Low temperature
Refer to error codes (P1/P2/L5/LD).
1., 2. Check water piping.
• Low load
• Inlet water is too cold.
OCH532A
3.
Defective water pump
4.
Defective outdoor fan control.
5.
Overcharge of refrigerant
6.
Defective refrigerant circuit (clogs)
7.
Malfunction of linear expansion valve
55
3. Check water pump.
4. Check outdoor fan motor.
5., 6. Check operating condition of refrigerant circuit.
7. Check linear expansion valve.
Error code
P6
Title and display conditions
Possible Cause
<Defrosting>
<Defrosting>
THW2 detects a temperature ≤15ºC and TH2 1. Reduced water flow
detects a temperature ≤−16ºC for consecutive 10
• Clogged filter
seconds.
• Leakage of water
Diagnosis and action
1., 2. Check water piping.
2. Low temperature
• Low load
• Inlet water is cold
E0/E4
Main controller communication failure
(Reception error)
Error code E0 is displayed if main controller does
not receive any signal from the indoor unit for ref.
address "0" for 3 mins.
Error code E4 is displayed if indoor unit does not
receive any data from the main controller for 3
mins or indoor unit does not receive any signal
from the main controller for 2 mins.
3.
4.
5.
1.
Defective water pump
Leakage or shortage of refrigerant
Malfunction of linear expansion valve
Contact failure with transmission cable
2. Wiring procedure not observed.
(Cable length/cable diameter/number
of indoor units/number of main
controllers)
3. Fault on the indoor unit FTC4 board
section controlling Ref. address "0"
3.
4.
5.
1.
Check water pump.
Correct to proper amount of refrigerant.
Check linear expansion valve.
Check connection cable for damage or
loose connections at the FTC4 and main
controller terminals.
2. Check main controller and FTC4 common
wiring max cable length 500 m.
Only use 2 core cable.
Only connect 1 main controller to 1 FTC4
indoor unit board.
3. to 5.
If the problem is not solved by the above
measures then:
Turn the power to the indoor unit OFF and
then ON.
Power to both the indoor unit and outdoor
units should be switched OFF then ON.
(This may require switching 1 or 2 breakers
depending if the unit is powered independently from the outdoor unit).
If the E4 code is still displayed the FTC4
and/or the main controller circuit board
4. Fault with the main controller circuit
board
5. Electrical noise causes interference
with transmission/reception of data for
main controller.
E3/E5
Main controller communication failure
(Transmission error)
Error code E3 is displayed if the main controller
an not find an empty transmission path and thus
fails to transmit for 6 secs or the data received
bythe main controller is different to what was sent
(by the main controller) 30 consecutive times.
Error code E5 is displayed if the FTC4 can not
find an empty transmission path for 3 mins and
thus cannot transmit or the data sent by the FTC4
is different to what was expected 30 consecutive
times.
E6
Indoor/outdoor communication failure
(Reception error)
Error code E6 is displayed if after the power is
switched ON to the indoor unit, the FTC4 board
does not receive any signal or the signal receivedis not complete for 6 mins, or after a period of
operation the FTC4 board does not receive any
signal or the signal received is not complete for 3
mins.
1. 2 or more main controllers have been
connected to the FTC4.
1. Only connect 1 main controller to 1 FTC4
indoor unit board.
2. Fault with main controller transmission/
receiving circuit board
2. to 4.
3. Fault with the main controller circuit
board
4. Electrical noise causes interference
with transmission/reception of data for
main controller.
*
1. Contact failure/short circuit/miswiring
2. Fault with outdoor unit transmission/
receiving circuit board
3. Fault with FTC4 transmission/receiving
circuit board
4. Electrical noise causes interference
with FTC4-Outdoor unit transmission
cable.
E7
Indoor/outdoor communication failure
(Transmission error)
Error code E7 is displayed if despite the FTC4
board sending signal "0", signal "1" is received
30 consecutive times.
OCH532A
Turn the power to the indoor unit OFF and
then ON.
Power to both the indoor unit and outdoor
units should be switched OFF then ON.
(This may require switching 1 or 2 breakers
depending if the unit is powered independently from the outdoor unit).
If the E3/E5 code is still displayed the FTC4
and/or the main controller circuit board
1. Fault with FTC4 transmission/receiving
circuit board
2. Electrical noise causes interference
with power supply.
3. Electrical noise causes interference
with FTC4-outdoor unit transmission
cable.
56
Check the LED display on the outdoor unit
circuit board.
(Connect the A-control service tool, PACSK52ST to test.) Refer to the outdoor unit
service manual for explanation of EA-EC
codes.
1. Check the connections on the indoor and
outdoor units have not become loose and
that the connecting cable is not damaged.
2. to 4.
Turn the power to the indoor unit OFF and
then ON.
Power to both the indoor unit and outdoor
units should be switched OFF then ON.
(This may require switching 1 or 2 breakers
depending if the unit is powered independently from the outdoor unit).
If the E6 code is still displayed the FTC4
and/or the outdoor unit circuit board should
be replaced.
1. to 3.
Turn the power to the indoor unit OFF and
then ON.
Power to both the indoor unit and outdoor
units should be switched OFF then ON.
(This may require switching 1 or 2 breakers
depending if the unit is powered independently from the outdoor unit).
If the E7 code is still displayed the FTC4
circuit board should be replaced.
Error code
Title and display conditions
Possible Cause
E1/E2
Main controller control board failure
Error code E1 displayed if main controller can not
access it's non volatile (non power dependent)
memory.
Error code E2 is displayed when there is a fault
with the main controller's internal clock.
Indoor unit/wireless receiver communication
failure
Error code J0 is displayed when the FTC4 can
not receive data from the wireless receiver for 1
min.
1. Fault with the main controller circuit
board
1. Replace main controller circuit board.
1. Connection fault with wireless receiverFTC4 connection
1. Check the connections to the wireless receiver and FTC4 have not become loose
and that the connecting cable is not damaged.
2. to 4.
Turn the power to the indoor unit OFF and
then ON.
Power to both the indoor unit and outdoor
units should be switched OFF then ON.
(This may require switching 1 or 2 breakers
depending if the unit is powered independently from the outdoor unit).
If the J0 code is still displayed the FTC4
and/or the wireless receiver circuit board
should be replaced.
J0
Diagnosis and action
2. Fault with FTC4 receiving circuit board
3. Fault with wireless receiver's transmission circuit board
4. Electrical noise causes interference
with wireless receiver communication
cable.
J1 to J8
Wireless remote controller/wireless receiver
communication failure
(Reception error)
Error code displayed if wireless receiver receives
no/incomplete data from the wireless remote
controller for 15 consecutive minutes.
The digit after the J refers to the address of the
wireless remote controller that has the error.
E.g. Error code "J3" refers to a communication
fault between the wireless receiver and wireless
remote control with address 3.
J9
1. Battery on wireless remote control may
be flat
1. Check and replace the battery if necessary
the wireless remote controller battery.
2. The wireless remote controller is out of
range of the wireless receiver.
2. to 4.
Reposition the wireless remote control closer
to the receiver and perform a communication
test.
For procedure refer to wireless remote
controller installation manual.
If "OK" is displayed then the cause of the
J1 to J8 error was the controller was out of
range of the receiver.
The wireless remote controller should be
installed within range of the receiver.
If "Err" is displayed replace wireless remote
controller with a new controller and perform
the pairing procedure.
If after this procedure the "Err" code is still
displayed the fault is with the receiver unit
(attached to the indoor unit).
The receiver unit should be replaced with a
new part and the original remote control can
be reconnected.
If "OK" is displayed then the fault is with the
remote control and this should be replaced.
3. Fault with wireless remote controller
transmission circuit board
4. Fault with wireless receiver's reception
circuit board
Main controller communication failure
Error code J9 is displayed when signal is not
received normally from FTC4 (slave) for 3 mins.
Refer to error codes (E0 and E4)
Note: To cancel error codes please switch system off (press button F4 (RESET) on main controller).
OCH532A
57
10-5. Troubleshooting by inferior phenomena
No.
Fault symptom
1
Main controller display
is blank.
Possible cause
1. There is no power supply to main
controller.
2. Power is supplied to main controller,
however, the display on the main
controller does not appear.
Explanation - Solution
1. Check LED2 on FTC4. (See <Figure 5.2.1 in installation manual>.)
(i) When LED2 is lit.
Check for damage or contact failure of the main controller wiring.
(ii) When LED2 is blinking.
Refer to No. 5 below.
(iii) When LED2 is not lit.
Refer to No. 4 below.
2. Check the following:
• Disconnection between the main controller cable and the FTC4 control board
• Failure of the main controller if “Please Wait” is not displayed.
• Refer to No. 2 below if “Please Wait” is displayed.
1. Normal operation.
2
“Please Wait” remains
displayed on the main
controller.
3
The main screen
appears with a press
of the “ON” button, but
disappears in a second.
4
LED2 on FTC4 is off.
When LED1 on FTC4 is also off. (See <Figure
(See <Figure 5.2.1 in 5.2.1 in installation manual>.)
installation manual>.)
<FTC4 powered via outdoor unit.>
1. The outdoor unit is not supplied at the 1. Check the voltage across the terminals L and N or L3 and N on the outdoor
rated voltage.
power board. (See section 4.5. in installation manual)
• When the voltage is not 220 to 240V AC, check wiring of the outdoor unit and
of the breaker.
• When the voltage is at 220 to 240V AC, go to “2.” below.
2. Defective outdoor controller circuit board. 2. Check the voltage across the outdoor unit terminals S1 and S2. (See section 4.5.
in installation manual)
• When the voltage is not 220 to 240V AC, check the fuse on the outdoor
control board and check for faulty wiring.
• When the voltage is 220 to 240V AC, go to “3.” below.
3. FTC4 is not supplied with 220 to 240V
3. Check the voltage across the indoor unit terminals S1 and S2. (See section 4.5.)
AC.
• When the voltage is not 220 to 240V AC, check FTC4-outdoor unit wiring for
faults.
• When the voltage is 220 to 240V AC, go to “4.” below.
4. FTC4 failure.
4. Check the FTC4 control board.
• Check the fuse on FTC4 control board.
• Check for faulty wiring.
• If no problem found with the wiring, the FTC4 control board is faulty.
5. Faulty connector wiring.
5. Check the connector wiring.
• When the connectors are wired incorrectly, re-wire the connectors referring to
below. (See section 4.5. in installation manual)
1. "Please Wait" is displayed for up to 6
minutes.
2. Communication failure between the main 2, 3. Main controller start up checks/procedure.
(i) If “0%” or “50-99%” is displayed below "Please Wait" there is a
controller and FTC4.
communication error between the main controller and the FTC4 control
3. Communication failure between FTC4
board.
and outdoor unit.
• Check wiring connections on the main controller.
• Replace the main controller or the FTC4 control board.
(ii) If “1-49%” is displayed there is a communication error between the outdoor
unit's and FTC4's control boards.
• Check the wiring connections on the outdoor unit control board and the FTC4
control board.
(Ensure S1 and S2 are not cross-wired and S3 is securely wired with no
damage. (See section 4.5. in installation manual)
• Replace the outdoor unit's and/or the FTC4's control boards.
The main controller operations do not work
Normal operation.
for a while after the settings are changed in
The indoor unit is applying updated settings made in the service menu. Normal
the service menu. This is because the system operation will start shortly.
takes time to apply the changes.
S3
OCH532A
58
Black
CN01
S2
YELLOW
YELLOW
S1
BLACK
BLACK
L
N
FTC4 powered
via outdoor unit
CN01
Hydrobox
control board
No.
4
Fault symptom
Possible cause
Explanation - Solution
LED2 on FTC4 is off. <FTC4 powered on independent source>
(See Figure <5.2.1 in 1. FTC4 is not supplied with 220 to 240V AC.
installation manual>)
2. There are problems in the method of
connecting the connectors.
1. Check the voltage across the L and N terminals on the indoor power supply
terminal block. (See section 4.5. in installation manual)
• When the voltage is not 220 to 240V AC, check for faulty wiring to power
supply.
• When the voltage is 220 to 240V AC, go to 2. below.
2. Check for faulty wiring between the connectors.
• When the connectors are wired incorrectly re-wire them correctly referring
to below. (See section 4.5 in installation manual and a wiring diagram on
the control and electrical box cover.)
S1
S2
CN01
FTC4 powered
from independent
source
BLACK YELLOW
YELLOW BLACK
L
N
Black
CN01
Hydrobox
control board
S3
• If no problem found with the wiring, go to 3. below.
3. FTC4 failure.
5
LED2 on FTC4 is
blinking.
(See Figure <5.2.1 in
installation manual>)
When LED1 on FTC4 is lit.
Incorrect setting of refrigerant address for
outdoor unit.
(None of the refrigerant address is set to "0".)
When LED1 is also blinking on FTC4 .
Faulty wiring between FTC4 and outdoor
unit
When LED1 on FTC4 is lit.
1. Faulty wiring in main controller
Multiple indoor units have been wired to a
single outdoor unit.
2. Short-circuited wiring in main controller
3. Main controller failure
LED4 on FTC4 is off.
(See figure <5.2.1>
in installation manual)
1. SD memory card is NOT inserted into the
memory card slot with correct orientation.
2. Not an SD standards compliant memory card.
LED4 on FTC4 is
blinking.
(See Figure <5.2.1>
in installation manual)
1.
2.
3.
4.
7
No water at hot tap.
8
Cold water at tap.
1.
2.
1.
2.
6
Full of data.
Write-protected.
NOT formatted.
Formatted in NTFS file system.
Cold main off
Strainer (field supply) blocked.
Hot water run out.
Prohibit, schedule timer or holiday mode selected.
3. Heat pump not working.
4. Booster heater cut-out tripped.
5. The earth leakage circuit breaker for booster
heater breaker (ECB1) tripped.
6. The booster heater thermal cut-out has
tripped and cannot be reset using the manual
reset button.
7. Immersion heater cut-out tripped.
8. Immersion heater breaker (ECB2) tripped.
9. 3-way valve fault
OCH532A
59
3. Check the FTC4 control board.
• Check the fuse on FTC4 control board.
• Check for faulty wiring.
• If no problem found with the wiring, the FTC4 control board is faulty.
Recheck the refrigerant address setting on the outdoor unit.
Set the refrigerant address to “0”.
(Set refrigerant address using SW1(3 - 6) on outdoor controller circuit board.)
Check for faulty wiring between FTC4 and outdoor unit.
1. Check for faulty wiring in main controller.
The number of indoor units that can be wired to a single outdoor unit is one.
Additional indoor units must be wired individually to a single outdoor unit.
2.,3. Remove main controller wires and check LED2 on FTC4. (See Figure 5.2.1.
in installation manual)
• If LED2 is blinking check for short circuits in the main controller wiring .
• If LED2 is lit, wire the main controller again and:
- if LED2 is blinking, the main controller is faulty;
- if LED2 is lit, faulty wiring of the main controller has been corrected.
1. Correctly insert SD memory card in place until a click is heard.
2. Use an SD standards compliant memory card. (Refer to section 5.6. in installation manual)
1. Move or delete data, or replace SD memory card with a new one.
2. Release the write-protect switch.
3. Refer to "5.6 Using SD memory card" in installation manual.
4. FTC4 is Not compatible with NTFS file system. Use an SD memory card formatted in FAT file system.
1. Check and open stop cock.
2. Isolate water supply and clean strainer.
1. Ensure DHW mode is operating and wait for DHW tank to re-heat.
2. Check settings and change as appropriate.
3. Check heat pump – consult outdoor unit service manual.
4. Check booster heater thermostat and press reset button if safe.
Reset button is located on the side of booster heater, covered with white rubber cap. See 4. PART NAMES AND FUNCTIONS to find out its position.
5. Check the cause and reset if safe.
6. Check resistance across the thermal cut-out, if open then the connection is
broken and the booster heater will have to be replaced.
Contact your Mitsubishi Electric dealer.
7. Check immersion heater thermostat and press reset button, located on immersion heater boss, if safe. If the heater has been operated with no water
inside it may have failed, so please replace it with a new one.
8. Check the cause and reset if safe.
9. Check plumbing/wiring to 3-way valve.
(i) Manually override 3-way valve using the main controller. (Refer to <Manual operation> in section 9-2.) If the valve does not still function, go to (ii)
below.
(ii) Replace 3-way valve.
No.
Fault symptom
9
Water heating takes
longer.
Possible cause
1. Heat pump not working.
2. Booster heater cut-out tripped.
3. Booster heater breaker (ECB1) tripped.
4. The booster heater thermal cut-out has
tripped and cannot be reset using the manual
reset button.
5. Immersion heater cut-out has been triggered.
6. Immersion heater breaker (ECB2) tripped.
10
Temperature of DHW
tank water dropped.
When DHW operation is not running, the DHW
tank emits heat and the water temperature
decreases to a certain level. If water in the DHW
tank is reheated frequently because of a significant drop in water temperature, check for the
following.
1.
Water leakage in the pipes that connect to
the DHW tank
Insulation material coming loose or off.
2.
3.
3-way valve failure
3.
Hot or warm water Heat of hot water pipe is transferred to cold water
from cold tap.
pipe.
12
Water leakage
Heating system does
not reach the set
temperature.
1.
2.
11
13
Explanation - Solution
1. Check heat pump – consult outdoor unit service manual.
2. Check booster heater thermostat and press reset button if safe.
Reset button is located on the side of booster heater, covered with white rubber cap. See 4. PART NAMES AND FUNCTIONS to find out its position.
3. Check the cause and reset if safe.
4. Check resistance across the thermal cut-out, if open then connection is broken and the booster heater will have to be replaced.
Contact your Mitsubishi Electric dealer.
5. Check immersion heater thermostat and press reset button if safe. If the
heater kept running with no water inside, this may have resulted in failure, so
replace it with a new one.
6. Check the cause and reset if safe.
Take the following measures.
• Retighten the nuts holding the pipes onto the DHW tank.
• Replace seal materials.
• Replace the pipes.
Fix insulation.
Check plumbing/wiring to 3-way valve.
(i) Manually override 3-way valve using the main controller. (Refer to <Manual
operation> in section 9-2.) If the valve does not still function, go to (ii) below.
(ii) Replace 3-way valve.
Insulate/re-route pipework.
1. Poorly sealed connections of water circuit
components
1. Tighten connections as required.
2. Water circuit components reaching the end of
life
2. Refer to PARTS CATALOG in the service manual for expected part lifetimes
and replace them as necessary.
1. Prohibit, schedule timer or holiday mode selected.
1. Check settings and change as appropriate.
2. Check settings and change as appropriate.
2. Check the battery power and replace if flat.
3. The temperature sensor is located in a room
that has a different temperature relative to
that of the rest of the house.
4. Heat pump not working.
3. Relocate the temperature sensor to a more suitable room.
5. Booster heater cut-out tripped.
6. Booster heater breaker (ECB1) tripped.
4. Check heat pump – consult outdoor unit service manual.
5. Check booster heater thermostat and press reset button if safe.
Reset button is located on the side of booster heater, covered with white rubber cap. (See 4. PART NAMES AND FUNCTIONS for position.)
6. Check the cause of the trip and reset if safe.
7. The booster heater thermal cut-out tripped
and can not be reset using the manual reset
button.
8. Incorrectly sized heat emitter.
7. Check resistance across the thermal cut-out, if open then the connection is broken and the booster heater will have to be replaced.
Contact your Mitsubishi Electric dealer.
8. Check the heat emitter surface area is adequate
Increase size if necessary.
9. 3-way valve failure
9. Check plumbing/wiring to 3-way valve.
10. Battery problem (*wireless control only)
10. Check the battery power and replace if flat.
11. If a mixing tank is installed, the flow rate be- 11. Increase the flow rate between the mixing tank and the hydrobox decrease
tween the mixing tank and the hydrobox is
that between the mixing tank and the local system.
less than that between the mixing tank and
the local system.
OCH532A
60
No.
Fault symptom
14
In 2-zone temperature control, only
Zone2 does not
reach the set temperature.
15
16
17
18
19
20
When a PUHZFRP outdoor unit is
connected, DHW or
Heating operation
cannot run.
When a PUHZ-FRP
outdoor unit is connected and is in heat
recovery operation,
the set temperature
is not reached.
After DHW operation
room temperature
rises slightly.
The room temperature rises during DHW
operation.
Water discharges
from pressure relief
valve.
(Primary circuit)
Water discharges
from pressure relief
valve (field supplied
item).
(Sanitary circuit)
Possible cause
1.
Explanation - Solution
1.
Normal action no action necessary.
2.
When Zone1 and Zone2 are both in heating
mode, the hot water temperature in Zone2
does not exceed that in Zone1.
Faulty wiring of motorized mixing valve
2.
Refer to "5.3 Wiring for 2-zone temperature control" in installation manual.
3.
Faulty installation of motorized mixing valve
3.
Check for correct installation. (Refer to the manual included with each motorized mixing valve.)
4.
Incorrect setting of Running time
4.
Check for correct setting of Running time.
5.
Motorized mixing valve failure
5.
Inspect the mixing valve. (Refer to the manual included with each motorized
mixing valve.)
The outdoor unit is set to have operation of the
indoor unit of air conditioner take precedence
over that of the hydrobox, and in the main controller settings "Electric heater (Heating)" or "Electric
heater (DHW)" is turned off.
When the outdoor unit is set to have cooling
operation of the indoor unit of air conditioner take
precedence over that of the hydrobox, the outdoor
unit controls the frequency of the compressor
according to the load of air conditioner. The DHW
and heating run according to that frequency.
At the end of the DHW mode operation the 3-way
valve diverts hot water away from the DHW circuit
into space heating circuit.
This is done to prevent the hydrobox components
from overheating.
The amount of hot water directed into the space
heating circuit varies according to the type of the
system and of the pipe run between the plate heat
exchanger and the hydrobox.
3-way valve failure
1. If continual – pressure relief valve may be
damaged.
2. If intermittent – expansion vessel charge may
have reduced/bladder perished.
1. If continual – field supplied pressure reducing
valve not working.
Turn ON Electric heater (Heating) or Electric heater (DHW) using the main controller.
Normal operation no action necessary.
If Air-to-Water system is given priority in operation, comp Hz can be regulated
depending on the load of DHW or Heating. For more details, refer to the PUHZFRP installation manual.
Normal operation no action necessary.
Check the 3-way valve.
1. Turn the handle on the pressure relief valve to check for foreign objects in it.
If the problem is not still solved, replace the pressure relief valve with a new
one.
2. Check pressure in expansion vessel.
Recharge to 1 bar if necessary.
If bladder perished replace expansion vessel with a new one.
1. Check function of pressure reducing valve and replace if necessary.
2. If continual – pressure relief valve seat may
be damaged.
2. Turn the handle on the pressure relief valve to check for foreign objects inside. If the problem is not still solved, replace the pressure relief valve.
3. If intermittent – expansion vessel charge may
have reduced/bladder perished.
3. Check gas-side pressure in expansion vessel.
Recharge to correct precharge pressure if necessary.
If bladder perished replace expansion vessel with a new one with appropriate
pre-charge.
4. Check the pressure in DHW tank. If pressure in DHW tank is similar to that in
the incoming mains, cold water supply that merges with incoming mains water supply could flow back to DHW tank. Investigate source of back-feed and
rectify error in pipework/fitting configuration. Adjust pressure in cold supply.
Use manual and automatic air vents to remove air from system.
Top up water if necessary to achieve 1 bar on primary circuit.
4. DHW tank may have subjected to backflow.
21
Noisy water circulation pump
Air in water circulation pump .
22
Noise during hot
water draw off
typically worse in the
morning.
1.
Loose airing cupboard pipework.
1. Install extra pipe fastening clips.
2.
Heaters switching on/off.
2. Normal operation no action necessary.
Mechanical noise
heard coming from
the hydrobox.
1.
Heaters switching on/off.
Normal operation no action necessary.
2.
3-way valve changing position between DHW and
heating mode.
Water circulation
pump runs for a
short time unexpectedly .
Milky/Cloudy water
(Sanitary circuit)
Water circulation pump jam prevention mechanism
(routine) to inhibit the build-up of scale.
Normal operation no action necessary.
Oxygenated water
Water from any pressurised system will release oxygen bubbles when water is
running. The bubbles will settle out.
The time of “Delay” set in “Economy settings
for pump” is too short. (Go to “Service menu”
→ “Auxiliary settings” → “Economy settings for
pump”).
Increase the time of “Delay” in “Economy settings for pump” .
23
24
25
26 Heating mode has
been on standby for
a long time (does
not start operation
smoothly.)
OCH532A
61
No.
Possible cause
Explanation - Solution
27 The hydrobox that
was running in the
heating mode before
power failure is
running in the DHW
mode after power
recovery.
Fault symptom
The hydrobox is designed to run in an operation
mode with a higher priority (i.e. DHW mode in this
case) at power recovery.
• Normal operation.
• After the DHW max. operation time has elapsed or the DHW max. temperature
has been reached, the DHW mode switches to the other mode (ex. Heating
mode).
28 Cooling mode is NOT
available.
Dip SW2-4 is OFF.
Turn Dip SW2-4 to ON. (Refer to “6-9 Dip switch settings” in this manual.)
29 The cooling system
does not cool down to
the set temperature.
1.
When the water in the circulation circuit is unduly hot, Cooling mode starts with a delay for
the protection of the outdoor unit.
1.
Normal operation.
When the outdoor ambient temperature is
lower than the preset temperature that activates the freeze stat. function, Cooling mode
does not start running.
The setting time period of Heat-pump-only operation is short.
2.
To run Cooling mode overriding the freeze stat. function, adjust the preset
temperature that activates the freeze stat. function.
(Refer to "<Freeze stat function>" on Page 37.)
The unit runs in Cooling mode when the outdoor
ambient temperature is lower than 10ºC (outside
of the guaranteed operating range).
(When defrosting operation is running at such a
low outdoor ambient temperature after Cooling
mode is switched to DHW or LP mode, the water
temperature in the cooling circuit drops too low,
which could result in L6 error to stop all the operations.
Do not run Cooling operation when the outdoor ambient temperature is lower
than 10ºC.
To automatically stop or recover only Cooling operation and keep other operations running, the freeze stat. function can be used. Set the preset temperature
that activates the freeze stat. function to adjust the outdoor ambient temperature
as follows. (Refer to "<Freeze stat function>" on Page 37.)
2.
30 The electric heaters
are activated shortly
after DHW or LP
mode starts running
after Cooling mode.
31 During DHW or LP
mode following the
cooling mode, error
L6 (circulation water
freeze protection
error ) occurs and the
system stops all the
operations.
Adjust the setting time period of Heat-pump only operation. (Refer to “<Electric
heater (DHW)> on Page 36.
Outdoor ambient temperature
3ºC higher than the preset temperature
5ºC higher than the preset temperature
Cooling operation
Stop
Recover
Annual Maintenance
It is essential that the hydrobox is serviced at least once a year by a qualified individual any spare parts required MUST be purchased from Mitsubishi Electric (safety
matter).
NEVER bypass safety devices or operate the unit without them being fully operational.
<Draining the hydrobox>
WARNING: DRAINED WATER MAY BE VERY HOT
1. Before attempting to drain the hydrobox isolate from the electrical supply to prevent booster heater burning out.
2. Isolate hydrobox from primary water circuit and drain water from hydrobox. Use a suitable heat resistant hose to assist in these operations.
3. Drain any remaining water from booster heater using fitted drain cock and hose to safely drain the unit.
4. After the hydrobox is drained, water remains in the following component parts. Drain water completely by checking the inside of the parts.
• Strainer (Remove the strainer cover.)
• Pressure relief valve (Operate the valve.)
<Annual maintenance points>
Use the Annual Maintenance Log Book as a guide to carrying out the necessary checks on the hydrobox and outdoor unit.
OCH532A
62
10-6. Checking Component Parts' Function
Part Name
Check Points
<Water Circulation Pump Characteristics>
EHSC, ERSC series
Signal cable
3
M
1~
BLUE
BLACK
BROWN
3
Power cable
BLUE
80.0
PWM input signal
External static pressure [kPa]
BROWN
Signal ref.
Feedback signal
L
N
GREEN/
YELLOW
Speed 5 (Default)
70.0
Speed 4
Speed 3
60.0
Speed 2
50.0
Speed 1
40.0
30.0
20.0
10.0
0.0
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
Flow rate [L/min]
EHPX series * (with PUHZ-W50)
External static pressure [kPa]
80.0
Speed 5 (Default)
70.0
Speed 4
Speed 3
60.0
Speed 2
50.0
Speed 1
40.0
30.0
20.0
10.0
0.0
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
Flow rate [L/min]
EHPX series * (with PUHZ-W85)
External static pressure [kPa]
80.0
<Recommended water flow rate range>
Outdoor heat pump unit
Water flow rate range [L/min]
Packaged
PUHZ-W50
7.1 - 14.3
PUHZ-W85
10.0 - 25.8
PUHZ-HW112
14.4 - 27.7
PUHZ-HW140
17.9 - 27.7
Split
PUHZ-RP35
7.1 - 11.8
PUHZ-RP50
7.1 - 17.2
PUHZ-RP60
8.6 - 20.1
PUHZ-(H)RP71
10.2 - 22.9
PUHZ-(H)RP100
14.4 - 27.7
PUHZ-(H)RP125
17.9 - 27.7
PUHZ-RP140
20.1 - 27.7
PUHZ-SW40
7.1 - 11.8
PUHZ-SW50
7.1 - 17.2
PUHZ-SW75
10.2 - 22.9
PUHZ-SW100
14.4 - 27.7
PUHZ-SW120
20.1 - 27.7
PUHZ-SHW80
10.2 - 22.9
PUHZ-SHW112
14.4 - 27.7
PUHZ-SHW140
17.9 - 27.7
Speed 5 (Default)
70.0
Speed 4
60.0
Speed 3
Speed 2
50.0
Speed 1
40.0
30.0
20.0
10.0
0.0
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
Flow rate [L/min]
EHPX series * (with PUHZ-HW112/140)
External static pressure [kPa]
80.0
* If the water flow rate is less than 7.1 L/min, the flow switch will be
activated.
If the water flow rate exceeds 27.7 L/min, the flow speed will be
greater than 1.5 m/s, which could erode the pipes.
Speed 5 (Default)
70.0
Speed 4
60.0
Speed 3
50.0
Speed 2
Speed 1
40.0
30.0
20.0
10.0
0.0
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
Flow rate [L/min]
* For installation of EHPX series, set its pump speed with a pressure drop between the
hydrobox and the outdoor unit factored into the external static pressure.
OCH532A
63
Part Name
Check Points
Earth leakage circuit breaker for heater
If a short circuit occurs on the booster heater, immersion heater, or each power line, a
short-circuit breaker will trip and power source will be blocked.
Eliminate the causes of short circuit and then turn on the breaker again.
Relay for heater
When the applied voltage is not 230V AC across the terminals A1-A2, check the terminals
R-U, S-V, and T-W are open.
When the applied voltage is 230V AC across the terminals A1-A2, check the terminals
R-U, S-V, and T-W are short.
R
S
T
A1 A2
U
V
W
Booster heater
Measure the resistance between the terminals with a tester.
Thermostat (90 °C) and thermal cut out (121 °C)
90 °C
Manual reset
water
thermostat
121 °C
Thermal
cut-out
Normal
110(±35)mΩ
Abnormal
Open or Short
Terminal
1-2
Normal
26.5(+3/-1.3)Ω
Abnormal
Open or Short
Terminal
1-2
3-4
Normal
26.5(+3/-1.3)Ω
13.3(+1.5/-0.6)Ω
Abnormal
Open or Short
Open or Short
Terminal
1-2=2-3=1-3
4-5=5-6=4-6
Normal
105.8(+11.8/-5)Ω
52.9(+5.8/-2.5)Ω
Abnormal
Open or Short
Open or Short
AWG18
AWG18
Terminal
9-10
9
10
2kW heater (230V, 1 phase)
AWG15 FEP
WHITE
AWG15 FEP
WHITE
2kW
2
1
2 + 4kW heater (230V, 1 phase)
2kW
2kW
2
1
AWG13 FEP
BLUE
AWG13 FEP
BLUE
AWG15 FEP
WHITE
AWG15 FEP
WHITE
2kW
4
3
3 + 6kW heater (400V, 3 phase)
1kW
1
2
3
2kW
AWG13 FEP
BLUE
AWG13 FEP
BLUE
AWG15 FEP
WHITE
2kW
5
4
AWG13 FEP
BLUE
1kW
AWG15 FEP
WHITE
AWG15 FEP
WHITE
1kW
2kW
6
3 + 6kW heater (230V, 3 phase)
1kW
2kW
1
2
3
OCH532A
4
AWG13 FEP
BLUE
AWG13 FEP
BLUE
2kW
AWG15 FEP
WHITE
AWG15 FEP
WHITE
AWG15 FEP
WHITE
1kW
2kW
5
AWG13 FEP
BLUE
1kW
Terminal
1-2=2-3=3-1
4-5=5-6=6-4
6
64
Normal
35.3(+3.9/-1.8)Ω
17.6(+1.9/-0.9)Ω
Abnormal
Open or Short
Open or Short
Part Name
Check Points
Flow switch
Measure the resistance between the terminals with a tester.
1
State of moving part
2
Flow
Normal
Abnormal
Paddle vertical (Flow < 5.5 l/min)
Open
Other than open
Paddle inclined (Flow > 5.5 l/min)
Short
Other than short
3
Thermistors
Disconnect the connector then measure the resistance with a tester.
(At ambient temperatures of 10 - 30°C.)
Thermistor
TH1
TH2
THW1
THW2
THW5
THW6
THW7
THW8
THW9
THWB1
THWB2
OCH532A
65
Normal
Abnormal
4.3 - 9.5 kΩ
Open or short
40 - 100 kΩ
Open or short
<Thermistor Characteristics Charts>
50
• Room temperature thermistor (TH1)
• Liquid refrigerant temperature thermistor (TH2)
• Flow water temperature thermistor (THW1)
• Return water temperature thermistor (THW2)
• DHW tank temperature thermistor (THW5)
• Zone 1 flow water temperature thermistor (THW6)
• Zone 1 return water temperature thermistor (THW7)
• Zone 2 flow water temperature thermistor (THW8)
• Zone 2 return water temperature thermistor (THW9)
Resistance (k)
40
Thermistor R0 = 15kΩ ± 3%
B constant = 3480 ± 2%
1
1
Rt = 15exp {3480 ( 273+t – 273 )}
0°C
10°C
20°C
25°C
30°C
40°C
20
10
15kΩ
9.6kΩ
6.3kΩ
5.2kΩ
4.3kΩ
3.0kΩ
0
-20 -10 0 10 20 30 40 50
Temperature ()
1000
• Boiler flow water temperature thermistor (THWB1)
• Boiler return water temperature thermistor (THWB2)
900
Thermistor R100 = 3.3kΩ ± 2%
B constant = 3970 ± 1%
1
1
Rt = 3.3exp {3970 ( 273+t – 273 )}
800
700
Resistance (kΩ)
0°C
10°C
20°C
25°C
30°C
40°C
50°C
60°C
70°C
80°C
30
162.8kΩ
97.4kΩ
60.3kΩ
48.1kΩ
38.6kΩ
25.4kΩ
17.1kΩ
11.9kΩ
8.4kΩ
6.0kΩ
600
500
400
300
200
100
0
-30 -20 -10
0
10
20
30
40
Temperature (°C)
OCH532A
66
50
60
70
80
10-7. Test point diagram
F2
6.3A/250V
FTC4 (Controller board)
F1
6.3A/250V
OUT10 (TBO.1 1-2)
Signal output (Boiler)
(non-voltage contact)
CNP1/OUT1 (TBO.1 3-4)
Water circulation pump1
(230V AC)
CN01
Power supply
(230V AC)
OUT3 (TBO.1 7-8)
Water circulation pump3
(Field supply) (230V AC)
CNV1/OUT4 (TBO.1 9-11)
3-way valve/2-way valve1
(9-10: 230V AC)
OUT5 (TBO.1 12-14)
Mixing valve (Field supply)
(12-13[Open]: 230VAC)
(13-14[Close]: 230VAC)
OUT8 (TBO.2 11-12)
Signal output for booster heater 2+
(230V AC)
LED3
Transmission
(Indoor/Outdoor)
LED2
Power supply
(Main controller)
8 0 2 4
CNIH/OUT9 (TBO.2 9-10)
Signal output for immersion
heater (230V AC)
7 9 1 3
OUT13 (TBO.2 7-8)
2-way valve2
(230V AC)
CN3C
Transmission
(Indoor/Outdoor)
(0 - 24V DC)
2 4
OUT12 (TBO.2 3-4)
Signal output (Defrost) (230V AC)
1 3
OUT11 (TBO.2 1-2)
Signal output (Error) (230V AC)
2 4 6 8 0 2 4
1 3 5 7 9 1 3
OUT2 (TBO.1 5-6)
Water circulation pump2
(Field supply) (230V AC)
CNRF
Transmission (Indoor/
Wireless receiver)
(1-2: 11.5 - 13.2 V DC)
LED4
Reading or writing
data to SD card
CNBHT/BHT (TBO.2 13-14)
Thermostat input for
booster heater
CNPWM
Water circulation
pump 1
(2 - 3: 5V DC)
CNBH
Signal output for booster heater
(1-3: heater1 230V AC)
(5-7: heater2 230V AC)
CN108
SD card
CNBC
Signal output for booster heater
protection (230V AC)
LED1
Power supply
(FTC4)
CNW12
Thermistor
(1-2: Flow water temp.)
(3-4: Return water temp.)
CNW5
Thermistor
(DHW tank water temp.)
CN21
Thermistor (Ref. liquid temp.)
2 4 6 8 0 2 4
CN20
Thermistor
(Room temperature)
CN2F/IN2
(TBI.1 3-4)
Flow switch 1 input
IN1
(TBI.1 1-2)
Room thermostat 1 input
OCH532A
1 3 5 7 9 1 3
IN3
(TBI.1 5-6)
Flow switch
2 input
IN4
(TBI.1 7-8)
Demand
control input
IN5
(TBI.1 9-10)
Outdoor thermostat input
2 4 6 8 0 2 4
1 3 5 7 9 1 3
IN7
(TBI.1 13-14)
Flow switch 3
input
THWB1
(TBI.2 3-4)
Thermistor
(Boiler flow
water temp.)
THW6
(TBI.2 7-8)
Thermistor
(Zone1 flow
water temp. )
THW9
(TBI.2 11-12)
Thermistor
(Zone2 return
water temp. )
IN6
(TBI.1 11-12)
Room thermostat 2 input
THW8
(TBI.2 1-2)
Thermistor
(Zone2 flow
water temp. )
THWB2
(TBI.2 5-6)
Thermistor
(Boiler return
water temp.)
THW7
(TBI.2 9-10)
Thermistor
(Zone1 return
water temp. )
67
CN22/RC(TBI.2 13-14)
Main controller
(10.4 - 13.7 V DC)
11
DISASSEMBLY PROCEDURE
<Preparation for the repair service>
● Prepare the proper tools.
● Prepare the proper protectors.
● Provide adequate ventilation.
● After stopping the operation of the cylinder and outdoor unit, turn off the power-supply breaker and remove the
power plug.
● Discharge the condenser before the work involving the electric parts.
● Allow parts to cool.
● Do not expose the electric parts to water.
● When replacing or servicing water circuit parts, drain system first.
EHSC-VM2B, EHSC-VM6B, EHSC-YM9B, EHSC-TM9B, EHSC-VM6EB, EHSC-YM9EB,
EHPX-VM2B, EHPX-VM6B, EHPX-YM9B, ERSC-VM2B
Check individual illustrations and positions of the parts by referring to the parts catalog included in this manual.
Some lead wires and pipes are bundled with Bands. Cut the bands to undo the fastened pipes and lead wires if necessary.
When bundling the lead wires and pipes again, use new commercially available bands.
When removing the parts associated with water pipe work, drain the hydrobox as necessary. (Refer to "Draining the Hydrobox"
on page 30.)
When draining the hydrobox, keep water from splashing on the internal parts (mainly electric parts and insulations).
PHOTOS & ILLUSTRATION
DISASSEMBLY PROCEDURE
1. How to remove the front panel
(1) Remove the 2 screws at the bottom of the hydrobox. (Photo 1-1)
(2) Slightly lift and pull out the front panel from the hydrobox. (Photo
1-1)
(3) Disconnect the relay connector connecting from the main
controller. (Photo 1-2)
Photo 1-1
Photo 1-2
Front panel
Connector
Main controller
Screws
2. How to remove the main controller
(1) Remove the front panel. (Refer to Procedure 1).
(2) Turn the front panel over and remove the 4 screws retaining the
controller support. (Photo 2-1)
(3) Remove the main controller from the case while moving up the
claw at the top of the case. (Figure 2-1)
Figure 2-1
OCH532A
Photo 2-1
Screws
68
Controller support
Front panel
PHOTOS
DISASSEMBLY PROCEDURE
3. How to remove the electrical parts
Photo 3-1
Control box cover fixing screws
(Steps (1) through (3) are applied to all the following parts.)
(1) Remove the front panel. (Refer to Procedure 1).
(2) Remove the 4 screws holding the control box cover.
(Photo 3-1)
(3) Slightly lift and pull out the control box cover. (Photo 3-1)
Control box
cover
Control box cover
fixing screws
<Earth leakage circuit breaker> (Photo 3-2)
(4) Disconnect all the lead wires from the earth leakage circuit breaker.
(5) Remove the 2 screws on the earth leakage circuit breaker.
Note:To avoid dropping of the breaker, hold the breaker by
hand when removing the last screws.
<Contactor> (Photo 3-2)
(4) Disconnect all the lead wires from the contactors.
(5) Remove the 2 screws on each contactor.
Note:To avoid dropping of the contactors, hold the contactors
by hand when removing the last screws.
To prevent an electrical shock, wait until all the LED
lamps on the FTC4 control board are turned off.
Photo 3-2
Control box
Earth leakage circuit
breaker (ECB1)
Controller
board
Contactors
<Terminal block> (Photo 3-2)
(4) Disconnect all the lead wires from the terminal block. (To
disconnect the S1, S2 and S3 lead wires, disengage the
locks by pressing on the claws.)
(5) Remove the screw on the terminal block.
Note: To avoid dropping of the terminal block, hold the terminal block by hand when removing the screw .
Screw
Terminal block (TB1)
* The photos shown are of the EHSC model.
Photo 3-3
<Controller board> (Photo 3-3)
(4) Disconnect all the lead wires from the controller board.
(5) Remove the controller board from the 6 board supports.
OCH532A
69
Controller
board
PHOTOS
DISASSEMBLY PROCEDURE
4. How to swing the control box to the front
(1) Remove the front panel. (Refer to Procedure 1.)
(2) Remove the control box cover. (Refer to Procedure 3.)
*If the screw of the control box bracket (R) and 2 screws
of the control box bracket (L) are removed, the control
box can be swung to the front without removing control
box cover.
(3) Remove the screw from the control box bracket (R) and
2 screws from the control box bracket (L).
(4) Remove the coated clamps.
(5) Disengage the control box bracket (R) from the righthand side panel and pull the control box. At this point,
lifting slightly and pulling the control box will swing the
control box to the front. (Photo 4-2)
Photo 4-1
Screw
Earth cable
Side panel
Screw
Bracket
(L)
Note: Remove the field wiring as necessary.
Bracket
(R)
Screw
Coated clamps
* The photos shown are of the EHSC model.
Photo 4-2
Control box
Swing
OCH532A
70
PHOTOS
DISASSEMBLY PROCEDURE
5. How to remove water pump/ pump valve
<Water pump>
Close the 2 pump valves (OFF) before removing the water
pump, and open the valves (ON) after reinstalling the water
pump.
(1) Remove the front panel. (Refer to Procedure 1.)
(2) Remove the control box cover. (Refer to Procedure 3.)
(3) Disconnect the CNP1 connector, the earth cable, and the
CNPWM connector in the control box. (Photo 5-1)
(4) Release the water pump lead wire from the 2 cable
clamps, the cable strap, the 3 coated clamps and feed
the lead wire out the control box without putting strain on
the CNP1 connector. (Photo 5-1)
(5) Swing the control box to the front. (Refer to Procedure 4.)
(6) Remove the pump support top by removing the 2 screws
holding it to the pump support under (Photo 5-2).
Note: To avoid dropping of the pump support top, hold it
by hand when removing the last screw, .
(7) Close (OFF) the 2 pump valves and remove the G1-1/2"
nuts using two spanners: one to hold the pump and the
other to turn the individual nuts.
Remove the water pump by cutting the band fixing the
pump to the pump support under. (Photos 5-2)
* When either of the pump valve handles is stiff, remove
the handle and turn the vertical stem 90 degrees
clockwise mainly by using a spanner. (Photo 5-4)
* Set the water pump in the orientation of the arrow printed
on the water pump and in the way that the terminal box
faces to the front. (Photo 5-2)
* When reinstalling the G1-1/2" nuts, use new G1-1/2"
gaskets. (Photo 5-3)
<Pump valve>
(8) Remove the pump valves by removing the G1" nuts
using two spanners: one to hold the pump and the other
to turn each G1" nut . (Photo 5-2)
* When reinstalling the G1" nuts, use new G1" gaskets.
* When either of the pump valve handles is stiff, remove
the handle and turn the vertical stem 90 degrees
clockwise mainly by using a spanner. (Photo 5-4)
* When reinstalling the valves, place the handles to the
right hand side of the valves.
Note: Skip Steps (3) and (4) above when replacing the pump
valves only.
When replacing both the water pump and the pump
valves, skip Step (7) above.
Photo 5-1
Water pump connector (CNP1)
Earth cable
Lead
wire
Cable
clamps
CNPWM
connector
Cable
strap
Coated
clamp
Coated clamps
Photo 5-2
Pump valve
Gasket (G1")
Water pump
Nut (G1")
Nut
(G1-1/2")
Screw
Screw
Terminal box
Band
Pump
support
top
Nut (G1-1/2")
Nut (G1")
Photo 5-3
Gasket (G1")
Pump valve
Photo 5-4
Gasket G1-1/2"
Pump valve
OCH532A
71
Stem
DISASSEMBLY PROCEDURE
PHOTOS
6. How to remove the flow switch
(1) Remove the front panel. (Refer to Procedure 1.)
(2) Remove the control box cover. (Refer to Procedure 3.)
(3) Disconnect the CN2F connector on the controller board.
(Photo 6-1)
(4) Release the flow switch lead wire from the 2 cable
clamps, the cable strap, the 2 coated clamps and feed
the lead wire out the control box without putting strain
on the CN2F connector. (Photo 6-1)
(5) Swing the control box to the front. (Refer to Procedure 4.)
(6) Remove the flow switch by removing the nut. (Photo 6-2)
* When reinstalling the nut, use a new O-ring.
(Photo 6-3)
Note:To ensure the correct functioning of the flow switch,
check the following when installing it:
▪ The flow switch paddle is set perpendicularly to the
water flow. (Photos 6-2, 6-4)
▪ The lead wire of the flow switch points to the left-hand
side. (Photo 6-2)
▪ The lead wire runs parallel to the water pipe. (Figure 6-1)
Photo 6-1
Cable
clamps
Cable
strap
Coated
clamp
Photo 6-4
Coated
clamp
Flow switch connector
(CN2F)
Lead wire
Flow switch
Photo 6-2
Nut
Flow switch paddle
Figure 6-1
Flow direction
Flow switch
Pipe
Water pipe
Photo 6-3
Flow
OK
Lead wire
Pipe
Flow switch
Flow
NG
Flow switch
Pipe
Flow
NG
Figure 2
OCH532A
72
O-ring
DISASSEMBLY PROCEDURE
PHOTOS
7. How to remove the booster heater
(1) Remove the front panel. (Refer to Procedure 1.)
(2) Remove the control box cover. (Refer to Procedure 3.)
(3) Disconnect the booster heater lead wires from the
CNBHT connector on the controller board and from the
BHC1 (Lead wire No.1 and No.2) and BHC2 (Lead wire
No.3 and No.4) contactors respectively. (Photo 7-1)
(4) Swing the control box to the front. (Refer to Procedure 4.)
Note: Do not mix up the lead wire numbers when
re-connecting the lead wires to the contactors as
the lead wire numbers are different dependent on
the models.
Model
EHSC-VM6B
EHSC-VM6EB
EHPX-VM6B
EHSC-YM9B
EHSC-TM9B
EHSC-YM9EB
EHPX-YM9B
EHSC-VM2B
EHPX-VM2B
ERSC-VM2B
Lead wire No.
No.1
No.2
No.3
No.4
No.1
No.2
No.3
No.4
No.5
No.6
No.1
No.2
Photo 7-1
Control box
Earth leakage breakers (ECB1)
Cable
clamp
Connector
(CNBHT)
Cable
clamp
Contactor
BHC1-U
BHC1-V
BHC2-U
BHC2-V
BHC1-U
BHC1-V
BHC1-W
BHC2-U
BHC2-V
BHC2-W
BHC1-U
BHC1-V
Flow switch
connector
(CN2F)
BHC2
Cable strap
No.4
Coated clamp
Refer to 6. WIRING DIAGRAM
No.1 No.2 BHC1
No.3
* The photos shown are of the EHSC-VM6B model.
(5) Close (OFF) the pump valve (upper).
(6) Remove the two G1" nuts. (Photo 7-2)
* When reinstalling the G1" nuts, use new G1" gaskets.
(7) Remove the flare nut (Photo 7-2).
(8) Remove the two screws that hold the heater stay onto
the back panel. Lift the booster heater slightly and
remove the booster heater with the heater stay from the
back panel .
(9) Remove the 2 screws on the back of the heater stay and
remove the heater stay from the booster heater. (Photo
7-3)
(10) Remove the drain cock (primary circuit) from the booster heater. (Photo 7-2)
* Replace the removed drain cock (primary circuit).
The drain cock can not be reused.
Photo 7-2
Flare nut
Back panel
Gasket (G1")
Nut (G1")
Screw
Heater stay
Screw
Booster
heater
Pump valve
(upper)
Nut (G1")
Gasket (G1")
Drain cock
Photo 7-3
Screws
Heater stay
OCH532A
73
DISASSEMBLY PROCEDURE
PHOTOS
8. How to remove the plate heat exchanger
(1) Pump down the refrigerant circuit and close the stop
valve on the indoor unit. (Refer to "12. Supplementary
information".)
(2) Remove the front panel. (Refer to Procedure 1.)
(3) Remove the control box cover. (Refer to Procedure 3.)
(4) Disconnect the CNP1 connector on the controller board
and the earth cable in the control box.
(5) Release the water pump lead wire from the 2 cable
clamps, the cable strap, the 2 coated clamps, and feed
the lead wire out the control box without putting strain on
the CNP1 connector.
(6) Swing the control box to the front. (Refer to Procedure 4.)
(7) Remove the pump support top by removing the 2 screws
that hold it to the pump support under. (Photo 8-2)
Note: To avoid dropping of the pump support top, hold it
by hand when removing the last screw.
(8) Remove the THW1 and TH2 thermistors from the
thermistor holders respectively. (Photo 8-2)
(9) Close the pump valve (lower) and remove the G1-1/2"
nut using two spanners: one to hold the pump valve and
the other to turn the nut.
* When reinstalling the G1-1/2" nut, use a new G1-1/2"
gasket. (Photo 5-3)
(10) Remove the G1" nut (upper) on the booster heater and
the water pump with the pump valve and the water pipe.
(Photo 8-2)
* When reinstalling the G1" nut, use a new G1" gasket.
Photo 8-1
Control box
Water pump connector (CNP1)
Earth cable
Cable
clamps
Cable
strap
Coated clamp
Nut
(G1")(upper)
Gasket (G1")
Photo 8-2
THW1
Photo 8-3
Flexible
hose
ERSC-VM2B only
Booster
heater
Nut (G1")
Pump support under Pump bracket
Screws
Pump valve
(upper)
Water pump
Nut
(G1-1/2")
Screws
Nut
(G1")
Pump support under
Pump bracket
Gasket
(G1")
Screw
Screw
Water pump
Gasket
(G1-1/2")
Flow
switch
Pump support top
Band
Gasket
(G1-1/2")
Nut (G1-1/2")
Nut (G1-1/2")
Pump valve
(lower)
Strainer
Pump valve
(lower)
TH2
OCH532A
Gasket
(G1")
Nut (G1") Rubber
mount
Band
74
TH2
Gasket Nut (G1") Rubber Pressure
mount relief valve
(G1")
DISASSEMBLY PROCEDURE
PHOTOS
8. How to remove the plate heat exchanger (continued)
(11) Remove the pump support under by removing the 4
screws. (Photo 8-4,5)
Note: To avoid dropping of the pump support under, hold
it by hand when removing the last screw.
(12) Remove the G1" nut on the flexible hose end that
connects to the booster heater. (Photo 8-2)
* When reinstalling the G1" nut, use a new G1" gasket.
(13) Close the strainer valve and remove the G1" nut on the
water outlet side of the strainer using two spanners: one
to hold the strainer and the other to turn the G1" nut.
(Photo 8-2)
* When reinstalling the G1" nut, use a new G1" gasket.
(14) Remove the rubber mount by cutting the band.
(Photo 8-2)
(15) Remove the flow switch. (Refer to Procedure 6.)
* Do not remove the CN2F connector on the controller
board.
* When reinstalling the flow switch, use a new O-ring.
(16) Remove the flare nuts on the gas and liquid pipes under
the hydrobox using two spanners: one to hold each
flare joint and the other to turn each flare nut.
(17) Remove the water coil cover by removing the 2 screws.
(Photo 8-6)
(18) Remove the plate heat exchanger assembly from the
hydrobox. Cut the band and remove the flexible hose
by removing the G1" nut at the top of the plate heat
exchanger. Remove the G1" nut at the bottom of the
plate heat exchanger. (Photos 8-7, 8-8, 8-9)
* When reinstalling the G1" nuts, use new G1" gaskets.
Photo 8-8
Photo 8-4
Screw
Screw
Screw
Pump
support
under
Photo 8-5
ERSC-VM2B only
Pump support under
Screw
Screw
Photo 8-6
Nut (G1")
Gasket (G1")
Photo 8-7
Refrigerant piping
Photo 8-9
Plate heat exchanger assembly
Plate heat
exchanger
Flexible hose
Nut (G1")
OCH532A
Water coil cover
Screws
75
Nut (G1")
Refrigerant piping Band
DISASSEMBLY PROCEDURE
PHOTOS
9. How to remove the strainer
(1) Remove the front panel. (Refer to Procedure 1.)
(2) Cut the band.
(3) Close the strainer valve (OFF).
* When either of the pump valve handles is stiff, remove
the handle and turn the vertical stem 90 degrees
clockwise mainly by using a spanner. (Photo 5-4)
(4) Remove the two G1" nuts using two spanners: one to hold
the strainer and the other to turn the individual G1" nuts.
* When reinstalling the G1" nuts, use new G1" gaskets
Photo 9-1
Nut (G1")
Strainer valves
Gasket
(G1")
Nut (G1")
Gasket
(G1")
<Removal of the strainer cover (debris recovery)>
(4) Remove the cover with two spanners: one to hold the
strainer and the other to turn the cover.
* Be sure to reattach the mesh after washing. (Photo
9-2)
* When reinstalling the cover , use a new O-ring.
Strainer
Cover
Band
Photo 9-2
Cover
Strainer mesh
O-ring
10. How to remove the manometer / pressure relief valve / air
vent (automatic)
(1) Remove the front panel. (Refer to Procedure 1.)
(2) Swing the control box to the front. (Refer to Procedure 4.)
<Manometer>
(3) Hold the sides of the manometer cover, disengage the
claws, and remove the manometer. (Photo 10-1)
(4) Remove the G1/4" nut and feed the capillary tube
through the bottom out the hydrobox.
* When reinstalling the G1/4" nut, use a new G1/4"
gasket. (Photo 10-2)
(5) Remove the manometer from the manometer cover while
pressing on the claws. (Photo 10-3)
* When reinstalling the manometer assembly on the hydrobox
beware not to put strain on the root of the capillary tube as
the capillary tube is easy to break at the root.
<Pressure relief valve>
(3) Remove the field piping from the pressure relief valve.
(4) Remove the manometer by removing the G1/4" nut.
* When reinstalling the G1/4" nut, use a new G1/4"
gasket. (Photo 10-2)
(5) Cut the band and remove the rubber mount. (Photo 10-2)
(6) Remove the pressure relief valve with a flare joint using
two spanners: one to hold the flare joint and the other to
turn the flare nut. (Photo 10-2)
(7) Remove the pressure relief valve using two spanners:
one to hold the flare joint and the other to turn the
pressure relief valve. (Photo 10-4)
(8) Eliminate locktite on the thread surfaces using remover.
(Photo 10-4)
* Before reinstallation, apply locktite over the thread
surface on the pressure relief valve.
* For more details about the locktite and the remover,
refer to Page 81.
Manometer
Manometer
cover
Photo 10-2
Band
Gasket (G1/4")
Nut (G1/4")
Flare nut
Pressure
relief valve
Capillary
tube
Rubber mount
Photo 10-3
Capillary
tube
Manometer
Claw
Claw
Root
OCH532A
Claws
Photo 10-1
76
DISASSEMBLY PROCEDURE
PHOTOS
10. How to remove the manometer / pressure relief valve / air
vent (automatic) (Continued)
Photo 10-4
Flare joint
Pressure relief valve
Threads for application
of loctite
<Air vent (automatic)>
(1) Remove the air vent with a flare joint using two spanners:
one to hold the flare joint and the other to turn the flare
nut.
(2) Remove the flare joint from the air vent. (Photo 10-6)
Photo 10-5
Expansion vessel
Air vent
Flare joint
Flare nut
Flare joint
Photo 10-6
Air vent
11. How to remove the expansion vessel
(1) Remove the front panel. (Refer to Procedure 1.)
(2) Swing the control box to the front. (Refer to Procedure 4.)
(3) Remove the flare nut using two spanners: one to hold the
flare joint and the other to turn the flare nut. (Photo 11-1)
(4) Remove the 2 screws on the metal support.
Note: To avoid dropping of the expansion vessel, hold the
expansion vessel with the metal support by hand
when removing the last screw.
(5) Pull out the metal support. (Photo 11-1)
(6) Pull out the expansion vessel. (Photo 11-1)
(7) Remove the flare joint from the expansion vessel.
(Photo 11-2)
* When reinstalling the flare joint, use a new G3/8"
gasket.
Photo 11-1
Screws
Metal support
Expansion vessel
Photo 11-2
Expansion vessel
Flare joint
Note: To avoid dropping of the expansion vessel, hold it
securely when removing it.
Gasket G3/8"
OCH532A
77
Flare nut
DISASSEMBLY PROCEDURE
PHOTOS
12. How to remove the drain cock (primary circuit)
(1) Remove the front panel. (Refer to Procedure 1.)
(2) Swing the control box to the front. (Refer to Procedure 4.)
(3) Remove the drain cock (primary circuit).
Photo 12-1
Booster heater
13. How to remove the flexible hose
(1) Remove the front panel. (Refer to Procedure 1.)
(2) Swing the control box to the front. (Refer to Procedure 4.)
(3) Cut the band. (Photo 13-1, 13-2)
(4) Cut the pipe cover tape about 10 cm from the top and
peel off the pipe cover.
(Photo 13-1)
* Reattach the pipe cover after reconnecting the flexible
hose.
(5) Loosen the flexible hose nuts on both ends and remove
the flexible hose. (Photos 13-1, 13-2)
* When reinstalling the nuts, use new G1" gaskets.
Photo 13-2
Photo 13-1
Tape
Nut (G1")
Gasket (G1")
Plate heat exchanger
Gasket (G1")
Refrigerant piping
Nut
(G1")
Band
Flexible hose
Gasket
(G1")
Nut
(G1")
OCH532A
Drain cock
Nut (G1")
Flexible hose
78
Band
Flexible hose
PHOTOS
DISASSEMBLY PROCEDURE
14. How to remove the thermistor <liquid refrigerant temp.>
(TH2) / thermistor <flow water temp. & return water temp.>
(THW1, THW2)
(1) Remove the front panel. (Refer to Procedure 1.)
(2) Remove the control box cover. (Refer to Procedure 3.)
(3) Disconnect the following connectors on the control board.
▪ TH2 (TH2)
▪ THW1, THW2 (THW12)
(4) Release the THW12 and TH2 lead wires from the cable
clamp, the cable strap and the 2 coated clamps. Feed
the lead wires out the control box without putting strain
on their connectors.
(5) Swing the control box to the front. (Refer to Procedure 4.)
(6) Remove the thermistors from the thermistor holders.
(Photo 14-2)
Photo 14-1
Control box
Earth leakage breakers (ECB1)
Connectors
(THW1)
(THW2)
(TH2)
Cable
clamp
Cable
strap
Coated
clamp
Photo 14-2
THW1 thermistor
Band
THW2 thermistor
Coated clamps
OCH532A
79
TH2 thermistor
DISASSEMBLY PROCEDURE
15. How to remove the drain pan (ERSC-VM2B only)
(1) Remove the front panel.
(2) Disconnect all the field piping.
(3) Cut the band holding the strainer. (Photo 15-2)
(4) Remove 3 screws on the cover plate. (Photo 15-3)
(5) Remove the cover plate. (Photo 15-4)
(6) Remove 3 screws each on the side panel (L, R), and 2
screws on the underneath surface and base assy from
the hydrobox. (Photo 15-5)
(7) Remove 5 screws on the base assy. (Photo 15-6)
(8) Remove the drain pan from the base. (Photo 15-7)
PHOTOS
Photo 15-1
Photo 15-2
Drain pan
Photo 15-3
Strainer
Band
Photo 15-4
Base
Cover plate
Cover plate
Photo 15-6
Base assy
Screws
Photo 15-5
Photo 15-7
Screws
Drain pan
Screws
Screws
OCH532A
80
Base
Notes on replacing the parts
Replacement of the parts listed below requires the following procedure.
After the parts are removed, eliminate loctite on threads by applying loctite remover, apply new loctite, and then install and tighten the parts to the specified
tightening torques below. For details about recommended loctite and loctite remover, refer to Table 11-1, and for details about the replacement parts and
their tightening torques, refer to Table 11-2.
Table 11-1
Recommended
Manufacturer
No.
Note
Loctite
Henkel
Loctite 577
Apply loctite all over from the end of external thread to the second
ridge. After installing the parts, fix the parts for at least 30 minutes
Loctite remover
Henkel
Loctite 7200 Gasket Remover
Spray loctite remover over sealant on the threads, let the sealant
sit until soft, and then eliminate it with a wire brush.
Note: When using the products above, refer to the appropriate manuals that come with the individual products.
Table 11-2
Recommended tightening
torque [Nm] *2
Part name *1
PRESSURE RELIEF VALVE 3bar
15 ± 1
*1. For more details about the listed parts refer to the parts catalogue included in this manual.
*2. Undertightening and overtightening the parts affect water seal life. Tighten the parts to the appropriate tightening torques.
When installing the parts that are not listed above, observe the tightening torques in accordance with Table 11-3.
Always use a new O-ring or gasket.
Table 11-3
Size
[inch]
Gasket
G1/4"
Recommended tightening torque
[Nm]
8±1
G3/8"
15 ± 1
G1"
42 ± 2
G1 1/2"
42 ± 2
Strainer cover
45 ± 4.5
O-ring
Flow switch
8±1
Attached packing
Air vent (Automatic)
Drain cock (primary circuit)
15 ± 1
15 ± 1
Flare joint (for water circuit parts)
35 ± 2
After the procedure is complete, ensure that no water leaks.
OCH532A
81
12
SUPPLEMENTARY INFORMATION
12-1. Refrigerant collecting (pumpdown) for split model systems only
Refer to “Refrigerant collection” in the outdoor unit installation manual or service manual.
12-2. Back-up operation of boiler
Heating operation is backed up by boiler.
For more details, refer to the installation manual of PAC-TH011HT-E.
<Installation & System set up>
1. Set Dip-SW 1-1 to ON "With boiler" and SW2-6 to ON “With Mixing tank”.
2. Install the thermistors THWB1 (Flow temp.) and THWB2 (return temp.) *1 on the boiler circuit.
3. Connect the output wire (OUT10: Boiler operation) to the input (room thermostat input) on the boiler. *2
4. Install one of the following room temp. thermostats. *3
Wireless remote controller (option)
Room temp. thermostat (field supply)
Main controller (remote position)
*1 The boiler temp. thermistor is an optional part.
*2 OUT10 has no voltage across it.
*3 Boiler heating is controlled on/off by the room temp. thermostat.
<Remote controller settings>
1. Go to Service menu > Heat source setting and choose “Boiler” or “Auto”. *4
2. Go to Service menu > Operation settings > Boiler settings to make detailed settings for “Auto” above .
*4 The “Auto” automatically switches heat sources between Heat pump (and Electric heater) and boiler.
OCH532A
82
13
SERVICE AND MAINTENANCE
The main controller settings changed from the default settings are reset by replacing the controller board. To facilitate reselecting settings on the main controller, it is
recommended to write down the changes in the sheet below before replacement.
13-1. Engineers Forms (1/2)
Should settings be changed from default, please enter and record new setting in ‘Field Setting’ column. This will ease resetting in the future should the system use
change or the circuit board need to be replaced.
Commissioning/Field settings record sheet
Main controller screen
Parameters
Main
Option
Setting
DHW *3
Legionella prevention *3
Heating/Cooling *2
Zone1 heating room temp
Zone2 heating room temp *1
Zone1 heating flow temp
Zone2 heating flow temp *1
Cooling flow temp *2
Zone1 heating compensation curve
Zone2 heating compensation curve *1
Holiday mode
Forced DHW operation
DHW
Heating
Holiday mode
Operation mode
DHW max. temp.
DHW temp. drop
DHW max. operation time
DHW mode restriction
Active
Hot water temp
Frequency
Start time
Max. operation time
Duration of maximum temp.
Zone1 operation mode
Zone2 operation mode *1
Compensation Hi set point
curve
Holiday
Initial settings
Zone1 outdoor ambient temp
Zone1 flow temp
Zone2 outdoor ambient temp *1
Zone2 flow temp *1
Lo set point Zone1 outdoor ambient temp
Zone1 flow temp
Zone2 outdoor ambient temp *1
Zone2 flow temp *1
Adjust
Zone1 outdoor ambient temp
Zone1 flow temp
Zone2 outdoor ambient temp *1
Zone2 flow temp *1
DHW *3
Heating/Cooling *2
Zone1 heating room temp
Zone2 heating room temp *1
Zone1 heating flow temp
Zone2 heating flow temp *1
Cooling flow temp *2
Language
°C/°F
Temp. display
Time display
Room sensor settings for Zone1
Room sensor settings for Zone2 *1
Room RC zone select *1
10°C - 30°C
10°C - 30°C
25°C - 60°C
25°C - 60°C
5°C - 25°C
−9°C - + 9°C
−9°C - + 9°C
Active/Non active/Set time
On/Off
On/Off/Timer
On/Off/Timer
Active/Non active/Set time
Normal/Eco
40°C - 60°C
5°C - 30°C
30 - 120 mins
30 - 120 mins
Yes/No
60°C - 70°C
1 - 30 days
00.00 - 23.00
1 - 5 hours
1 - 120 mins
Heating room temp/Heating flow temp/Heating
compensation curve/Cooling flow temp
Heating room temp/Heating flow temp/Heating
compensation curve
−15°C - +35°C
25°C – 60°C
−15°C - +35°C
25°C - 60°C
−15°C - +35°C
25°C - 60°C
−15°C - +35°C
25°C - 60°C
−14°C - +34°C
25°C - 60°C
−14°C - +34°C
25°C - 60°C
Active/Non active
Active/Non active
10°C - 30°C
10°C - 30°C
25°C - 60°C
25°C - 60°C
5°C - 25°C
ENG/FR/GER/SW/SP/IT/DA/NL/FIN/NOR/PT
°C/°F
Room/DHW tank/Room&DHW tank /Off
hh:mm/hh:mm AM/AM hh:mm
TH1/Main RC/Room RC1-8/“Time/Zone”
TH1/Main RC/Room RC1-8/“Time/Zone”
Zone1/Zone2
Default setting Field
setting Notes
20°C
20°C
45°C
35°C
15°C
0°C
0°C
–
–
On
On
–
Normal
50°C
10°C
60 mins
30 mins
Yes
65°C
15 days
03.00
3 hours
30 min
Room temp
Compensation
curve
–15°C
50°C
–15°C
40°C
35°C
25°C
35°C
25°C
—
—
—
—
Non active
Active
15°C
15°C
35°C
25°C
25°C
ENG
°C
Off
hh:mm
TH1
TH1
Zone1
*1 The settings related to Zone2 can be switched only when Zone2 temperature control is enabled (when Dip SW2-6 and SW 2-7 are ON).
*2 Cooling mode settings are available for ERSC-VM2B only.
*3 Only available if DHW tank present in system.
OCH532A
83
Engineers Forms (2/2)
Commissioning/Field settings record sheet (continued from the previous page)
Main controller screen
Setting
Service menu
Thermistor
adjustment
THW1
THW2
THW5
THW6
THW7
THW8
THW9
THWB1
THWB2
Auxiliary
Economy settings
settings
for pump
Electric heater
(Heating)
Electric heater
(DHW) *3
Mixing valve
control
Pump speed
Heat source setting
Operation
Freeze stat function
settings
Simultaneous
operation (DHW/
Heating)
Parameters
Default
setting
−10°C - +10°C
−10°C - +10°C
−10°C - +10°C
−10°C - +10°C
−10°C - +10°C
−10°C - +10°C
−10°C - +10°C
−10°C - +10°C
−10°C - +10°C
On/Off
Time before pump switched off (3 - 60 mins) *4
Space heating: On (used)/Off (not used)
Electric heater delay timer (5 - 180 mins)
DHW: On (used)/Off (not used)
Electric heater delay timer (15 - 30 mins)
Running time (10 - 240 secs)
Interval (1 - 30 mins)
Pump speed (1 - 5)
Standard/Heater/Boiler/Hybrid *5
Outdoor ambient temp. (3 - 20°C)
0°C
0°C
0°C
0°C
0°C
0°C
0°C
0°C
0°C
On
10 mins
On
30 mins
On
15 mins
120 secs
2 mins
5
Standard
5°C
On/Off *6
Off
Outdoor ambient temp. (−15 - +10°C)
−15°C
Cold weather function On/Off *6
Outdoor ambient temp. (−15 - −10°C)
Room temp control Temp. control interval (10 - 60 mins)
(Heating)
Min. temp. (25 - 45°C)
Flow temp. range
Boiler operation
Max. temp. (35 - 60°C)
50°C
Heat pump thermo diff. On/Off *6
adjust
Lower limit (−9 - −1°C)
−5°C
Hybrid settings
Intelligent settings
Floor dry up function
On/Off *6
Target temp.
Flow temp. (Increase)
On
Upper limit (+3 - +5°C)
5°C
Outdoor ambient temp. (−15 - +10°C)
Priority mode (Ambient/Cost/CO2)
Energy price Electricity (0.001 - 999 */kWh)
*7
Boiler (0.001 - 999 */kWh)
CO2
Electricity
(0.001 - 999 kg -CO2/kWh)
emission
Boiler (0.001 - 999 kg
-CO2/kWh)
Heat source Heat pump capacity
(1 - 40 kW)
Boiler efficiency
(25 - 150%)
Booster heater 1 capacity
(1 - 20 kW)
Booster heater 2 capacity
(1 - 20 kW)
−15°C
Ambient
0.5 */kWh
0.5 */kWh
0.5 kg -CO2/kWh
0.5 kg -CO2/kWh
11.2 kW
80%
2 kW
4 kW
Start&Finish (25 - 60°C)
Max. temp. (25 - 60°C)
Max. temp. period (1 - 20 days)
Temp. increase step (+1 - +10°C)
Off
30°C
45°C
5 days
+5°C
Increase interval (1 - 7 days)
2 days
Flow temp. (Decrease) Temp. decrease step (−1 - −10°C)
Decrease interval (1 - 7 days)
External input
settings
Off
−15°C
10 mins
30°C
Demand control
Heat source OFF/Boiler operation
(IN4)
Outdoor thermostat Heater operation/Boiler operation
(IN5)
−5°C
2 days
Boiler
operation
Boiler
operation
*4 Decreasing “time before pump switched off” may increase the duration of stand-by in Heating mode.
*5 When Dip SW1-1 is set to OFF “WITHOUT Boiler” or SW2-6 is set to OFF “WITHOUT Mixing tank”, neither Boiler nor Hybrid can be selected.
*6 On: the function is active; Off: the function is inactive.
*7 “*” of “*/kwh” represents currency unit (e.g. € or £ or the like)
OCH532A
84
Field
Notes
setting
13-2. Annual Maintenance Log Book
Contractor name
Site name
Engineer name
Site number
Hydrobox maintenance record sheet
Warranty number
No.
Mechanical
Isolate and drain hydrobox, remove mesh from internal strainer clean and
replace.
Open the pressure relief valve, check for unrestricted discharge to
2
the tundish and that the valve reseats correctly. Check there are no
blockages in the tundish and associated pipe work.
Drop the primary/heating system pressure to zero check and if necessary
3
top up the expansion relief vessel (1 bar). Air valve of expansion vessel
is TR-412.
Check and if necessary top up the concentration of anti-freeze/inhibitor (if
4
used in the system).
Top up the primary/heating system using an appropriate filling loop and
5
re-pressurise to 1 bar.
Heat system and check pressure does not rise above 3 bar and no water
6
is released from the safety valves.
7
Release any air from the system.
Refrigerant models only [EXCEPT EHPX]
1
Refer to outdoor unit manual.
Electrical
1
Check condition of cables.
2
Check rating and fuse fitted on the electricity supply.
Controller
1
Check field settings against factory recommendations.
2
Check battery power of wireless thermostat and replace if necessary.
Outdoor heat pump unit maintenance record sheet
Model number
Mechanical
1
Inspect grill, heat exchanger fins and air inlet for trapped debris/damage.
2
Check condensate drain provision.
3
Check integrity of water pipe work and insulation.
4
Check all electrical connections.
5
Check and record the operation voltage.
Model number
Serial number
Frequency
Notes
Frequency
Notes
Frequency
Notes
Frequency
Notes
Serial number
Frequency
Notes
1
* All the above checks should be carried out once a year.
Note:
Within the first couple of months of installation, remove and clean the hydrobox’s strainer plus any that are fitted external to the hydrobox. This is especially important when installing on an existing system.
In addition to annual servicing it is necessary to replace or inspect some parts after a certain period of system operation. Please see tables below for detailed instructions. Replacement and inspection of parts should always be done by a competent person with relevant training and qualifications.
Parts which require regular replacement
Parts
Pressure relief valve (PRV)
Air vent (Auto/Manual)
Drain cock (Primary circuit)
Flexible hose
Manometer
Parts which require regular inspection
Replace every
Possible failures
Parts
Check every
Water leakage due to
brass/copper corrosion
(Dezincification)
Immersion heater
2 years
6 years
Water circulation pump
20,000 hrs (3 years)
Possible failures
Earth leakage causing
circuit breaker to activate
(Heater is always OFF)
Water circulation pump
failure
Parts which must NOT be reused when servicing
* O-ring
* Gasket
Note:
Always replace the gasket for pump with a new one at each regular maintenance (every 20,000 hours of use or every 3 years).
OCH532A
85
HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
Copyright 2012 MITSUBISHI ELECTRIC CORPORATION
Distributed in Jan. 2013 No. OCH532 REVISED EDITION-A
Distributed in Sep. 2012 No. OCH532
Made in Japan
New publication, effective Jan. 2013
Specifications are subject to change without notice.