Mitsubishi Electric PUHZ-W85VHA Service manual

AIR TO WATER HEAT PUMP
April 2008
No. OCH439
SERVICE MANUAL
R410A
[model name]
[Service Ref.]
PUHZ-W85VHA
PUHZ-W85VHA
Note:
• This manual describes only
service data of PUHZ-W85VHA.
• RoHS compliant products have
<G> mark on the spec name plate.
CONTENTS
1. SAFETY PRECAUTION .......................................... 2
2. SPECIFICATIONS ..................................................... 4
3. DATA ............................................................................. 5
4. OUTLINES AND DIMENSIONS ............................ 7
5. WIRING DIAGRAM ................................................... 8
6. WIRING SPECIFICATIONS .................................... 9
7. REFRIGERANT SYSTEM DIAGRAM ...................10
8. TROUBLESHOOTING ...........................................11
9. DISASSEMBLY PROCEDURE ...........................38
PARTS CATALOG (OCB439)
PUHZ-W85VHA
1
SAFETY PRECAUTION
1-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply circuits must be disconnected.
1-2. CAUTIONS RELATED TO NEW REFRIGERANT
Cautions for units utilizing refrigerant R410A
Do not use refrigerant other than R410A.
If other refrigerant (R22 etc.) is used, chlorine in refrigerant can cause deterioration of refrigerant oil etc.
Use a vacuum pump with a reverse flow check valve.
Vacuum pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil etc.
Use the following tools specifically designed for use with R410A refrigerant.
The following tools are necessary to use R410A refrigerant.
Gauge manifold
Charge hose
Gas leak detector
Torque wrench
Tools for R410A
Vacuum pump adaptor
Electronic refrigerant
charging scale
Keep tools with care.
If dirt, dust or moisture enters into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction
of compressor.
Do not use a charging cylinder.
If a charging cylinder is used, the composition of refrigerant will change and the efficiency will be lowered.
Ventilate the room if refrigerant leaks during operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
Charge refrigerant from liquid phase of gas cylinder.
If the refrigerant is charged from gas phase, composition change may occur in refrigerant and the efficiency
will be lowered.
[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.
[2] Additional refrigerant charge
When charging directly from cylinder
· Check that 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.)
2
Unit
Gravimeter
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No.
1
Specifications
Gauge manifold
·Only for R410A
·Use the existing fitting specifications. (UNF1/2)
·Use high-tension side pressure of 5.3 MPa·G or over.
2
Charge hose
3
Electronic scale
·Only for R410A
·Use pressure performance of 5.09 MPa·G or over.
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
·Only for R410A
Top of cylinder (Pink)
Cylinder with syphon
8
Refrigerant recovery equipment
1-3. CAUTIONS FOR REFRIGERANT PIPING WORK
Tools for R410A (The following table shows whether conventional tools can be used or not.)
Tools and materials
Gauge manifold
Charge hose
Gas leak detector
Refrigerant recovery equipment
Refrigerant cylinder
Safety charger
Charge valve
Vacuum pump
Use
Air purge, refrigerant charge
and operation check
Gas leak check
Refrigerant recovery
Refrigerant charge
Prevent compressor malfunction
when charging refrigerant by
spraying liquid refrigerant
Prevent gas from blowing out
when detaching charge hose
Vacuum drying and air
purge
R410A tools
Tool exclusive for R410A
Tool exclusive for R410A
Tool for HFC refrigerant
Tool exclusive for R410A
Tool exclusive for R410A
Tool exclusive for R410A
Can R22 tools be used?
Can R407C tools be used?
Tool exclusive for R410A
Tools for other refrigerants can
be used if equipped with adopter for reverse flow check
Bend the pipes
Tools for other refrigerants can be used
Bender
Tools for other refrigerants can be used
Cut the pipes
Pipe cutter
Tools for other refrigerants can be used
Welder and nitrogen gas cylinder Weld the pipes
Tools for other refrigerants can be used
Refrigerant charging scale Charge refrigerant
Vacuum gauge or thermis- Check the degree of vacuum. (Vacuum Tools for other refrigerants
valve prevents back flow of oil and refri- can be used
tor vacuum gauge and
gerant to thermistor vacuum gauge)
vacuum valve
Charging cylinder
Refrigerant charge
Tool exclusive for R410A
: Prepare a new tool. (Use the new tool as the tool exclusive for R410A.)
: Tools for other refrigerants can be used under certain conditions.
: Tools for other refrigerants can be used.
3
(Usable if equipped
with adopter for reverse flow)
(Usable if equipped
with adopter for reverse flow)
SPECIFICATIONS
Power supply
Phase
Voltage
Frequency
Heating
(A2/W35)
Capacity
COP
Power input
Nominal water flow
Heating
Capacity
(A7/W35) COP
Power input
Nominal water flow
Cooling
Capacity
(A35/W7) EER (COP)
Power input
Nominal water flow
Cooling
Capacity
(A35/W18) EER (COP)
Power input
Nominal water flow
Outdoor unit
Model name
Running current
Max. current
Outer casing
External finish
Refrigerant control
Compressor
Heating (A7/W35)
Cooling (A35/W7)
V
Hz
kW
kW
L/min
kW
kW
L/min
kW
kW
L/min
kW
kW
L/min
A
A
A
1
230
50
7.0
3.40
2.06
25.8
9.0
3.90
2.31
25.8
7.5
2.40
3.12
21.5
7.5
3.91
1.92
21.5
Nominal operating condition
Heating (A2/W35)
Outside air temperature (Dry-bulb)
Outside air temperature (Wet-bulb)
Water temperature (inlet/outlet)
Heating (A7/W35)
Outside air temperature (Dry-bulb)
Outside air temperature (Wet-bulb)
Water temperature (inlet/outlet)
Cooling (A35/W7)
Outside air temperature (Dry-bulb)
Outside air temperature (Wet-bulb)
Water temperature (inlet/outlet)
Cooling (A35/W18)
Outside air temperature (Dry-bulb)
Outside air temperature (Wet-bulb)
Water temperature (inlet/outlet)
PUHZ-W85VHA
10.3
13.7
23.0
Galvanized plate
Munsell 3Y 7.8/1.1
Linear expansion valve
Hermetic twin rotary
TNB220FLHM1
1.3
Line start
HP switch
Discharge thermo
0.67 (FV50S)
Oil (Model)
L
Crankcase heater
W
Plate fin coil
(Air)
Heat exchanger
Plate heat exchanger
(Water)
Propeller fan × 1
Fan
Fan (drive) × No.
0.060
Fan motor output
kW
3
55
Air flow
m /min
(1,940)
(CFM)
*3
Defrost method
Reverse cycle
*2
Noise level
Heating
dB
48
*2
Cooling
dB
48
950 (37-3/8)
Dimensions
Width
mm(in.)
Depth
mm(in.) 330 +30*1 (13+1-3/16)
943 (37-1/8)
Height
mm(in.)
77 (170)
Weight
kg(lbs)
R410A
Refrigerant
2.4
(5.3)
Quantity
kg(lbs)
-20 ~ +35
Guaranteed operating
Heating
°C
*4
range (Outdoor)
Cooling
°C
-5 ~ +46
10.0 ~ 25.8
Water flow
L/min
Model
Motor output
kW
Start type
Protection devices
4
Plate heat exchanger
ALFA LAVAL
ACH30-40
A:40.4mm
B:268.2mm
W:93mm
H:325mm
D:69mm
40 plates
+ 2°C
+ 1°C
- /+35°C
+ 7°C
+ 6°C
+30/+35°C
+35°C
+ 24°C
+12/+7°C
+35°C
+ 24°C
+23/+18°C
w
Water OUT
Ref.IN
(Heating)
B
H
A
Ref.OUT
(Heating)
Water IN
Thermistor
(TH32)
D
Maximum outlet water temperature
65
Maximum outlet water temptemperature [°C]
2
60
55
50
45
40
-20
-15
-10
-5
0
5
10
Ambient temperature [°C]
*1
*2
*3
*4
grill
at distance of 1m from outdoor unit
Hot gas with four-way valve
With the optional air outlet guide, the operation at
-15°C outdoor temperature is possible.
3
DATA
3-1. NOISE CRITERION CURVES
MICROPHONE
1m
UNIT
1.5m
GROUND
PUHZ-W85VHA
MODE SPL(dB)
COOLING
48
HEATING
48
LINE
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 bar)
90
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20
10
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63
NC-20
125
250
500 1000 2000 4000
BAND CENTER FREQUENCIES, Hz
5
8000
3-2. STANDARD OPERATION DATA
Outdoor
Water
conditions conditions
Refrigerant circuit
Electrical circuit
Total
Mode
Cooling (A35/W7)
Heating (A7/W35)
Capacity
W
7,500
9,000
Input
kW
3.12
2.31
Outdoor unit
PUHZ-W85VHA
Phase, Hz
1, 50
Voltage
V
Current
A
13.7
10.3
Discharge pressure
MPa
2.81
2.21
Suction pressure
MPa
0.73
0.64
Discharge temperature
80
65
Condensing temperature
46
38
Suction temperature
3
-1
20.4
25.8
7
35
D.B.
35
7
W.B.
24
6
Flow volume
L/min
230
Outlet water temperature
Intake air temperature
The unit of pressure has been changed to MPa based on international SI system.
The conversion factor is: 1 (MPa) = 10.2 (kgf/cm2)
6
r
e
Ov
0
50
m
0m
r1
Ov
e
FREE
Water IN
Air Intake
Water OUT
Handle for moving
mm
er
Ov
10
mm
mm
00
r3
e
Ov
Over10
57
Service space
500
Over
Dimensions of space needed
for service access are
shown in the below diagram.
500
Over300
Rear Air Intake
Less than
Handle for moving
Handle for moving
Side Air Intake
FOUNDATION
<Foundation bolt height>
Please secure the unit firmly
with 4 foundation (M10) bolts.
(Bolts and washers must be
purchased locally.)
30
Over
The diagram below shows a
basic example.
Explantion of particular details are
given in the installation manuals etc.
Handle for moving
Side Air Intake
330
30
23
30
473
322
220
175
145
145
Earth terminal
950
145
Air Discharge
Installation Feet
600
Rear Air Intake
Service panel
Power supply wiring hole
(2-:27 knockout)
Handle for moving
Terminal Connections
Left...Power supply wiring
Right...Controller wiring
2-12 x 36 oval holes
(Foundation Bolt M10)
Drain hole
(5-:33)
175
2-U Shaped notched holes
(Foundfation Bolt M10)
19
370
28
3 FOUNDATION BOLTS
53
2 SERVICE SPACE
417
1 FREE SPACE (Around the unit)
943
219
81
7
673
119 40
34
Rear cover
Front cover
See Detail
Detail
Scale 1:3
24
ISO 228/1-G1 B
269
98
4
OUTLINES AND DIMENSIONS
PUHZ-W85VHA
5
WIRING DIAGRAM
PUHZ-W85VHA
SYMBOL
TB1
NAME
Terminal Block <Power Supply,Interface unit /
Flow temp. controller>
MC
MF1
21S4
SV
63H
63HS
TH3
TH4
TH6
TH7
TH8
TH32
LEV-A, LEV-B
DCL
ACTM
CY1,CY2
P.B.
TABU/V/W
TABS/T
TABP1/P2
Motor for Compressor
Fan Motor
Solenoid Valve <Four-Way Valve>
Solenoid Valve <Bypass Valve>
High Pressure Switch
High Pressure Sensor
Thermistor <Liquid>
Thermistor <Discharge>
Thermistor <Plate HEX Liquid>
Thermistor <Ambient>
Thermistor <Heat sink>
Thermistor <Inlet water>
Electronic Expansion Valve
Reactor
Active Filter Module
Capacitor
Power Circuit Board
Connection Terminal <U/V/W-Phase>
Connection Terminal <L/N-Phase>
Connection Terminal <DC Voltage>
SYMBOL
TABN1/N2
DS2, DS3
IPM
N.F.
LI,LO
NI,NO
EI,E2
52C
C.B.
SW1
SW2
SW5
SW6
SW8
SW10
SV1
CNDM
NAME
Connection Terminal <DC Voltage>
Diode bridge
Power Module
Noise Filter Circuit Board
Connection Terminal <L-Phase>
Connection Terminal <N-Phase>
Connection Terminal <Ground>
52C Relay
Controller Circuit Board
Switch <Function Switch>
Switch <Function Switch>
Switch <Function Switch>
Switch <Model Select>
Switch <Function Switch>
Switch <Model Select>
Connector <Connection for Option>
Connector
<Connection for Option(Contact Input)>
LED3
LED <Operation/ Inspection Indicators>
F1~ F4
Fuse <T6.3AL250V>
X52,X54, X55 Relay
*1 MODEL SELECT
SW 6
63HS
63H
TH32 TH7 TH6 TH3 TH4
LEV-A
LEV-B
M
M
C. B.
6 1
61
3 1
LEV-B CNVMNTCNMNT
(RED)
(WHT) (WHT)
5
1
*1
63H
(YLW)
3
TRANS
1
CN2
(WHT)
1
CN52C
(RED)
CN4
(WHT)
CN3S
(WHT)
1 2
1 2
7
3
LED3
CNDM1
(WHT)
2
2
3
1
F1
1
3
2
3
F4
21S4 3
(GRN)
4
21S4
5
1 SV1
(GRY)
1 SV2 3
(BLU)
1 3
CN51
(WHT)
X54
F3
CNAC
(WHT)
1
X52
F2
X55
7
CNS
(WHT)
?1
1
SV
BLU
LEV-A
(WHT)
63HS
(WHT)
SW10 SW2
3 1
1
TH7/6 TH3 TH4
(RED) (WHT) (WHT)
CNDC
(PNK)
2
0
1=ON, 0=OFF
3
2
1
0
t°
4 1 2 1 2
2 1
TH32
(BLK)
t°
6
0
WHT
1
t°
SW10
5
1
SW6
CNF1
(WHT)
MF1
MS
3~
t°
4
0
SW1
7
2 3
0 1
SW8 SW5
t°
1
1
0
LO
NO
N. F.
2
52C
1
CN52C
(BLK)
2
P. B.
2
1
TABS WHT
1
CN5
(RED)
BLK
1
RED
L2
BLK
1
P
N1
N2
6
L
N
BLU
ORN
GRN/YLW
RED
WHT
L1
BLU
YLW
W
MS MC
3~
4
EI
NI U
RED
U
BRN
TABN2
WHT
LI
V
DCL
2
1
3
2
TABW
TABV
TABN1
U
E2
U
BLK
TABN
TABP
RED TABU
2
DS2
3
TABP1 RED
WHT
2
7
1 CN3
2(WHT)
1 CN5
2 (RED)
1 CN4
2(WHT)
WHT
TH8
TABT BLU
IPM
TABP2
RED
CN2
(WHT)
DS3
3
6
1
7
t°
CNDC
(PNK)
CNAC2
(RED)
1
CNAF
(WHT)
CNAC1
(WHT)
4
CY1
CY2
S1 S2 S3
TB1
RED
WHT
Io
Interface unit /
Flow temp. controller
ACTM
POWER SUPPLY
~ / N 230V 50Hz
8
6
WIRING SPECIFICATIONS
FIELD ELECTRICAL WIRING (power wiring specifications)
Outdoor unit power supply
Outdoor unit Circuit Breaker capacity
Outdoor unit power supply, earth
Interface unit/Flow temp. controller-Outdoor unit
Interface unit/Flow temp. controller-Outdoor unit earth
Remote controller-Interface unit/Flow temp. controller
Outdoor unit L-N (single)
Interface unit/Flow temp. controller-Outdoor unit S1-S2
Interface unit/Flow temp. controller-Outdoor unit S2-S3
Remote controller-Interface unit/Flow temp. controller
Wiring
Circuit rating Wire No. ×
size (mm2)
*1
*2
*2
*3
*3
*3
*3
~/N (single), 50 Hz, 230 V
25 A
3 × Min. 4
3 × 1.5 (polar)
1 × Min. 1.5
2 × 0.3 (Non-polar)
AC 230 V
AC 230 V
DC 24 V
DC 12 V
*1.A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
*2.Max. 80 m
*3.The figures are NOT always against the ground.
S3 terminal has DC 24 V against S2 terminal. However between S3 and S1, these terminals are NOT electrically insulated by the transformer or other device.
Notes: 1. Wiring size must comply with the applicable local and national codes.
2. Power supply cables and the cables between Controller and Outdoor unit shall not be lighter than polychloroprene sheathed flexible cables.
(Design 60245 IEC 57)
3. Be sure to connect the cables between Controller and Outdoor unit directly to the units (no intermediate
connections are allowed).
Intermediate connections may result in communication errors. If water enters at the intermediate connection
point, it may cause insufficient insulation to ground or a poor electrical contact .
(If an intermediate connection is necessary, be sure to take measures to prevent water from entering the
cables.)
4. Install an earth longer than other cables.
9
7
REFRIGERANT SYSTEM DIAGRAM
PUHZ-W85VHA
P-Sensor
TH7
CHECK/V
REV/V
S/V
TH3
CHECK/V
CHECK/V
Water OUT
Distributor
H/P SW
Plate HEX
Receiver
TH4
TH8
Strainer
(#100)
P/B
TH32
Strainer
(#100)
COMP
LEV-B
Water IN
LEV-A
TH6
Strainer(#100)
Strainer(#100)
Refrigerant flow in heating
Refrigerant flow in cooling
Symbol
COMP
H/P SW
Plate HEX
REV/V
S/V
CHECK/V
P-Sensor
P/B
LEV-A
LEV-B
TH32
TH3
TH4
TH6
TH7
TH8
Receiver
Detail
Part name
Compressor
High pressure switch (63H)
Plate Heat Exchanger
Reversing (4-way) valve (21S4)
Solenoid valve
Check valve
Pressure sensor (63HS)
Power board
Linear expansion valve -A
Linear expansion valve -B
Inlet water temperature thermistor
Liquid temperature thermistor
Discharge temperature thermistor
Plate HEX liquid temperature thermistor
Ambient temperature thermistor
Heatsink temperature thermistor
Receiver
DC inverter twin rotary compressor (Mitsubishi Electric Corporation)
For protection (OFF:4.15MPa)
ACH30 - 40 Plates (Alfa Laval)
Change the refrigerant circuit (Heating / Cooling) and for Defrosting
For production test use
High pressure / Low pressure / For production test use
For calculation of the condensing temperature from high pressure
Inverter power board
Heating:Secondary LEV Cooling:Primary LEV
Heating:Primary LEV
Cooling:Secondary LEV
For freeze protection and for compressor frequency control
Heating:Evaporating temperature Cooling:Sub cool liquid temperature
For LEV control and for compressor protection
Heating:Sub cool liquid temperature Cooling:Evaporating temperature
For fan control and for compressor frequency control
For power board protection
For accumulation of refrigerant
10
8
TROUBLESHOOTING
8-1. TROUBLESHOOTING
<Error code display by self-diagnosis and actions to be taken for service (summary)>
Present and past error codes are logged and displayed on the control board of outdoor unit. Actions to be taken for service,
which depends on whether or not the trouble is reoccurring at service, are summarized in the table below. Check the contents
below before investigating details.
Unit conditions at service
Error code
Actions to be taken for service (summary)
Displayed
Judge what is wrong and take a corrective action according
to “8-3. Self-diagnosis action table”.
The trouble is reoccurring.
Not displayed
Conduct troubleshooting and ascertain the cause of the
trouble.
Logged
Consider the temporary defects such as the work of
protection devices in the refrigerant circuit including
compressor, poor connection of wiring, noise and etc.
Re-check the symptom, and check the installation
environment, refrigerant amount, weather when the
trouble occurred, matters related to wiring
and etc.
Reset error code logs and restart the unit after finishing
service.
There is no abnormality in electrical component,
controller board, and etc.
Not logged
Re-check the abnormal symptom.
Conduct troubleshooting and ascertain the cause of the
trouble.
Continue to operate unit for the time being if the cause
is not ascertained.
There is no abnormality concerning of parts such as
electrical component, controller board, and etc.
The trouble is not reoccurring.
8-2. CHECK POINT UNDER TEST RUN
Before test run
• After installation of outdoor units, piping work and electric wiring work, re-check that there is no water leakage, loosened connections and incorrect polarity.
• Measure impedance between the ground and the power supply terminal block (L, N) on the outdoor unit by 500 V Megger
and check that it is 1.0 M or over.
• Turn on power supply 12 hours before test run in order to protect compressor.
• Make sure to read operation manual before test run. (Especially items to secure safety.)
11
8-3. SELF-DIAGNOSIS ACTION TABLE
<Abnormalities detected when the power is turned on>
Error Code
Abnormal point and detection method
None
—
Judgment and action
Case
1 No voltage is supplied to terminal 1 Check following items.
a) Power supply breaker
block (TB1) of outdoor unit.
b) Connection of power supply terminal block.
a) Power supply breaker is
(TB1)
turned off.
c) Connection of power supply terminal block.
b) Contact failure or disconnec(TB1)
tion of power supply
terminal
c) Open phase (L or N phase)
2 Check following items.
2 Electric power is not supplied
a) Connection of power supply terminal block.
to power supply terminal of
(TB1)
noise filter circuit board / outConnection of terminal (LI, NI, LO, NO) on
door power circuit board.
the noise filter circuit board
a) Contact failure of power
b) Connection of terminal (TABT or TABS) on
supply terminal
outdoor power circuit board.
b) Open phase on the noise
Refer to 8-6.
filter circuit board / outdoor
power circuit board
: Disconnection of terminal
LI, NI, LO, NO
: Disconnection of terminal
TABT or TABS
3 Electric power is not supplied to 3 Check connection of the CNDC connector,
on the outdoor power circuit board.
outdoor controller circuit board.
Refer to 8-6.
a) Connector disconnected
(CNDC)
4 Disconnection of reactor (DCL) 4 Check connection of reactor. (DCL)
Check connection of “L1” and “L2” on the
active filter module. (ACTM) Refer to 8-6.
5 Disconnection of outdoor noise 5 Replace outdoor noise filter circuit board.
Refer to 8-6.
filter circuit board or parts failure in outdoor noise filter circuit
board
6 Defective outdoor power circuit 6 Replace outdoor power circuit board.
board
7 Replace outdoor controller circuit board (When
7 Defective outdoor controller
items above are checked but the units cannot
circuit board
be repaired.)
F5
63H connector open
Abnormal if 63H connector circuit is open
for 3 minutes continuously from being
switched on.
63H: High-pressure switch
1 Disconnection or contact failure
of 63H connector on outdoor
controller circuit board
2 Disconnection or contact failure
of 63H
3 63H is working due to defective
parts.
4 Defective outdoor controller
circuit board
12
1 Check connection of 63H connector on
outdoor controller circuit board.
Refer to 8-6.
2 Check the 63H side of connecting wire.
3 Check for continuity of 63H.
Replace high pressure switch if it is defective.
4 Replace outdoor controller circuit board.
Error Code
EA
Miswiring of Interface unit/Flow temp.
controller-outdoor unit connecting wire
1. Outdoor controller circuit board can
automatically check the number of
connected Interface unit/Flow temp. controller. Abnormal if the number cannot be
checked automatically due to miswiring
of Interface unit/Flow temp. controlleroutdoor unit connecting wire and etc.
after power is turned on for 4 minutes.
2. Abnormal if outdoor controller circuit
board recognizes excessive number of
Interface unit/Flow temp. controller.
Miswiring of Interface unit/Flow temp.
controller-outdoor unit connecting wire
(converse wiring or disconnection)
Outdoor controller circuit board can
automatically set the unit number of
Interface unit/Flow temp. controller.
Eb
Abnormal if the Interface unit/Flow temp.
controller number cannot be set within 4
minutes after power on because of miswiring (converse wiring or disconnection) of
Interface unit/Flow temp. controller-outdoor
unit connecting wire.
Start-up time over
The unit cannot finish start-up process
within 4 minutes after power on.
EC
Case
Abnormal point and detection method
Contact failure or miswiring of
Interface unit/Flow temp. controlleroutdoor unit connecting wire
Diameter or length of Interface
unit/Flow temp. controller-outdoor unit connecting wire is out
of specified capacity.
Excessive number of Interface
unit/Flow temp. controller is
connected to 1 outdoor unit.
(2 units or more)
Defective transmitting receiving
circuit of outdoor controller
circuit board
Defective transmitting receiving
circuit of Interface/Flow temp.
controller board
Noise has entered into power
supply or Interface/Flow temp.
controller-outdoor unit connecting wire.
Contact failure or miswiring of
Interface unit/Flow temp. controller-outdoor unit connecting wire
Diameter or length of Interface
unit/Flow temp. controller-outdoor unit connecting wire is out
of specified capacity.
Defective transmitting receiving circuit
of outdoor controller circuit board
Defective transmitting receiving
circuit of Interface/Flow temp.
controller board
Noise has entered into power supply
or Interface unit/Flow temp. controller-outdoor unit connecting wire.
Contact failure of Interface unit
/Flow temp. controller-outdoor
unit connecting wire
Diameter or length of Interface
unit/Flow temp. controlleroutdoor unit connecting wire is
out of specified capacity.
Noise has entered into power supply or Interface unit/Flow temp.
controller-outdoor unit connecting
wire.
13
Judgment and action
Check disconnection or looseness or polarity
of Interface unit/Flow temp. controller-outdoor
unit connecting wire of Interface unit/Flow
temp. controller and outdoor units.
Check diameter and length of Interface unit/
Flow temp. controller-outdoor unit connecting
wire.
Total wiring length: 80 m
(Including wiring connecting each Interface
unit/Flow temp. controller unit and between
Interface unit/Flow temp. controller and outdoor unit)
Also check if the connection order of flat
cable is S1, S2, S3.
Check the number of Interface unit/Flow
temp. controller that is connected to 1 outdoor unit. (If EA is detected.)
~
Turn the power off once, and on again to
check.
Replace outdoor controller circuit board or
Interface/Flow temp. controller board
if abnormality occurs again.
Check transmission path, and remove the
cause.
The descriptions above,
and EC.
- , are for EA, Eb
<Abnormalities detected while unit is operating>
Error Code
Abnormal point and detection method
High pressure (High-pressure switch
63H activated)
Abnormal if high-pressure switch 63H is
activated ( w ) during compressor operation.
w 4.15 MPa
63H: High-pressure switch
U1
U2
U3
Case
1 Decreased water flow
2 Clogged filter of water pipe
3 Dirt of plate heat exchanger
4 Locked water pump
5 Malfunction of water pump
6 Clogged or broken pipe
7 Locked outdoor fan motor
8 Malfunction of outdoor fan
motor
9 Short cycle of outdoor unit
0 Dirt of outdoor heat exchanger
1 Decreased airflow caused by
defective inspection of outside
temperature thermistor
(It detects lower temperature
than actual temperature.)
2 Disconnection or contact failure
of connector (63H) on outdoor
controller board
3 Disconnection or contact failure
of 63H connection
4 Defective outdoor controller
board
5 Defective operation of linear
expansion valve
6 Malfunction of fan driving
circuit
Judgment and action
1~5Check water circuit and repair the defect.
6 Check piping and repair the defect.
7~0 Check outdoor unit and repair the defect.
1 Check the detected temperature of outside
temperature thermistor on LED display.
(SW2: Refer to 8-7.)
2~4 Turn the power off and check F5 is
displayed when the power is turned on again.
When F5 is displayed, refer to “Judgment
and action” for F5.
5 Check linear expansion valve.
Refer to 8-5.
6 Replace outdoor controller board.
High discharging temperature
Abnormal if discharge temperature
thermistor (TH4) exceeds 125: or 110:
continuously for 5 minutes.
Abnormal if during defrosting discharge
temperature thermistor (TH4) exceeds
110: continuously for 30 minutes.
1 Check intake super heat.
1 Overheated compressor
Check leakage of refrigerant.
operation caused by insufficient
Charge additional refrigerant.
refrigerant
23 Turn the power off and check if U3 is dis2 Defective thermistor
played when the power is turned ON again.
3 Defective outdoor controller
When U3 is displayed, refer to “Judgement
board
and action” for U3.
4 Defective operation of linear
expansion valve
4 Check linear expansion valve.
Refer to 8-5.
Open/short circuit of discharge
temperature thermistor (TH4)
Abnormal if open (3: or less) or short
(217: or more) is detected during
compressor operation.
(Detection is inoperative for 10 seconds to
10 minutes of compressor starting process
and for 10 minutes after or during defrosting.)
1 Disconnection or contact
failure of connector (TH4) on
the outdoor controller circuit
board.
2 Defective thermistor
3 Defective outdoor controller
circuit board
14
1 Check connection of connector (TH4) on the
outdoor controller circuit board.
Check the lead wire for thermistor (TH4).
Refer to 8-6.
2 Check resistance value of thermistor (TH4) or
temperature on LED display.
(Thermistor/TH4: Refer to 8-5.)
(SW2: Refer to 8-7.)
3 Replace outdoor controller board.
Error Code
Abnormal point and detection method
Open/short of outdoor unit thermistors
(TH3, TH32, TH6, TH7, and TH8)
Abnormal if open or short is detected
during compressor operation.
Open detection of thermistors TH3, TH32
and TH6 is not detected for 10 seconds to
10 minutes after compressor starting and
10 minutes after and during defrosting.
Check which unit has abnormality in its
thermistor by switching the mode of
SW2.
(Refer to 8-7.)
U4
Symbol
TH3
TH32
TH6
TH7
TH8
U6
U7
1 Disconnection or contact failure 1 Check connection of connector (TH3, TH32,
TH6/TH7) on the outdoor controller circuit board.
of connectors
Check connection of connector (CN3) on the
Outdoor controller circuit
outdoor power circuit board.
board: TH3, TH32, TH6/TH7
Check the lead wire for thermistor (TH3,
Outdoor power circuit board:
TH32, TH6, TH7, TH8). Refer to 8-6.
CN3
2 Check resistance value of thermistor (TH3,
2 Defective thermistor
TH32, TH6, TH7, TH8) or check temperature
3 Defective outdoor controller
on LED display.
circuit board
(Thermistor/TH3, TH32, TH6, TH7, TH8:
Refer to 8-5.)
(SW2: Refer to 8-7)
3 Replace outdoor controller circuit board.
)
(
Thermistors
Name
Thermistor <Liquid temperature>
Thermistor <Inlet water temperature>
Thermistor <Plate HEX liquid temperature>
Thermistor <Ambient temperature>
Thermistor <Heatsink temperature>
Temperature of heatsink
Abnormal if heatsink thermistor (TH8)
detects 77:.
U5
Judgment and action
Case
Open detection Short detection
– 40 or below
– 40 or below
– 40 or below
– 40 or below
– 35 or below
1 The outdoor fan motor is
locked.
2 Failure of outdoor fan motor
3 Air flow path is clogged.
4 Ambient temperature is high.
5 Defective thermistor
6 Defective input circuit of
outdoor power circuit board
7 Failure of outdoor fan drive
circuit
90 or above
102 or above
90 or above
90 or above
102 or above
12 Check outdoor fan.
3 Check air flow path for cooling.
4 Check if there is something which causes
temperature rise around outdoor unit.
(Upper limit of ambient temperature is 46:.)
Turn off power, and on again to check if U5
is displayed within 30 minutes.
If U4 is displayed instead of U5, refer to
error code U4.
5 Check resistance value of thermistor (TH8)
or temperature by microcomputer.
(Thermistor/TH8: Refer to 8-5.)
(SW2: Refer to 8-7)
6 Replace outdoor power circuit board.
7 Replace outdoor controller circuit board.
Power module
1 Defective outdoor power circuit
Check abnormality by driving power module
board
in case overcurrent is detected.
2 Decrease of power supply voltage
(UF or UP error condition)
3 Loosens, disconnection or
reverse of compressor wiring
connection
4 Defective compressor
1 Replace outdoor power circuit board.
2 Check facility of power supply.
3 Correct the wiring (U•V•W phase) to
compressor. Refer to 8-6 (Outdoor power
circuit board).
4 Check compressor referring to 8-4.
Too low superheat due to low discharge 1 Disconnection or loose
temperature
connection of discharge
temperature thermistor (TH4)
Abnormal if discharge superheat is
continuously detected -15: or less for
2 Defective holder of discharge
temperature thermistor
3 minutes even though linear expansion
valve has minimum open pulse after com- 3 Disconnection or loose connection
of linear expansion valve’s coil
pressor starts operating for 10 minutes.
4 Disconnection or loose
connection of linear expansion
valve’s connector
5 Defective linear expansion valve
12 Check the installation conditions of
discharge temperature thermistor (TH4).
15
3 Check the coil of linear expansion valve.
Refer to 8-5.
4 Check the connection or contact of LEV-A and
LEV-B on outdoor controller circuit board.
5 Check linear expansion valve.
Refer to 8-4.
Error Code
U8
Abnormal point and detection method
Outdoor fan motor
Abnormal if rotational frequency of the fan
motor is not detected during DC fan motor
operation.
Fan motor rotational frequency is abnormal if;
• 100 rpm or below detected continuously
for 15 seconds at 20: or more outside
air temperature
• 50 rpm or below or 1500 rpm or more
detected continuously for 1 minute.
Case
1 Failure in the operation of
the DC fan motor
2 Failure in the outdoor circuit
controller board
1 Decrease of power supply voltage
2 Disconnection of compressor
wiring
Abnormal if any of followings are detected 3 Disconnection or loose connecduring compressor operation;
tion of CN52C
• Decrease of DC bus voltage to 310 V
4 Defective ACT module
• Instantaneous decrease of DC bus voltage 5 Defective ACT module drive
to 200 V
circuit of outdoor power circuit
• Increase of DC bus voltage to 400 V
board
• Decrease of input current of outdoor unit 6 Disconnection or loose connecto 0.1 A only if operation frequency is
tion of CNAF
more than or equal to 40 Hz or compres- 7 Defective 52C drive circuit of
sor
outdoor controller circuit board
current is more than or equal to 6 A.
8 Disconnection or loose
connection of CN5 on the
Check U9 error detail (SW2 all ON)
outdoor power circuit board
Refer to 8-7.
9 Defective input current circuit
of outdoor power circuit board/
noise filter circuit board
Overvoltage or voltage shortage
Synchronous signal to main circuit
U9
Ud
UF
UH
Overheat protection
Abnormal if outdoor pipe thermistor (TH3)
detects 70: or more or condensing
temperature of pressure sensor (63HS)
detects 70: or more during compressor
operation.
Compressor overcurrent interruption
(When compressor locked)
Abnormal if overcurrent of DC bus or
compressor is detected within 30 seconds
after compressor starts operating.
Judgment and action
1 Check or replace the DC fan motor.
2 Check the voltage of the outdoor circuit
controller board during operation.
3 Replace the outdoor circuit controller
board. (when the failure is still indicated
even after performing the remedy 1
above.)
1 Check the facility of power supply.
2 Correct the wiring (U•V•W phase) to compressor.
Refer to 8-6 (Outdoor power circuit board).
3 Check CN52C wiring.
4 Replace ACT module.
5 Replace outdoor power circuit board.
6 Check CNAF wiring.
7 Replace outdoor controller circuit board.
8 Check CN5 wiring on the outdoor power
circuit board.
Refer to 8-6.
9 Replace outdoor power circuit board/ noise
filter circuit board.
1 Defective outdoor fan (fan
motor) or short cycle of outdoor unit during cooling operation
2 Defective outdoor pipe
thermistor (TH3)
3 Defective outdoor controller
board
4 Defective pressure sensor
1 Check outdoor unit air passage.
1 Decrease of power supply voltage
2 Looseness, disconnection or
converse of compressor wiring
connection
3 Defective compressor
4 Defective outdoor power board
5 Decreased water flow
6 Clogged filter of water pipe
7 Clogged plate heat exchanger
8 Locked water pump
9 Malfunction of water pump
1 Check facility of power supply.
23 Turn the power off and on again to check
the error code. If U4 is displayed, follow the
U4 processing direction.
4 Check pressure by microcomputer.
(Pressure sensor/ 63HS)
(SW2: Refer to 8-7.)
2 Correct the wiring (U•V•W phase) to
compressor.
Refer to 8-6 (Outdoor power circuit board).
3 Check compressor. Refer to 8-4.
4 Replace outdoor power circuit board.
5~9 Check water circuit and repair the defect.
Current sensor error or input current error 1 Disconnection of compressor
1 Correct the wiring (U•V•W phase) to com·Abnormal if current sensor detects –1.0 A
wiring
pressor. Refer to 8-6 (Outdoor power circuit
to 1.0 A during compressor operation.
board).
2 Defective circuit of current
(This error is ignored during test run.)
sensor on outdoor power
2 Replace outdoor power circuit board.
·Abnormal if 32 A of input current is detected
circuit board
3 Check the facility of power supply.
or 28 A or more of input current is detected 3 Decrease of power supply voltfor 10 seconds continuously.
age
16
Error Code
UP
Abnormal point and detection method
Compressor overcurrent interruption
1 Decrease of power supply voltage
Abnormal if overcurrent DC bus or com2 Looseness, disconnection or
pressor is detected after compressor starts
converse of compressor wiring
operating for 30 seconds.
connection
3 Defective fan of outdoor units
4 Short cycle of indoor/outdoor
units
5 Defective input circuit of outdoor controller board
6 Defective compressor
7 Decreased water flow
8 Clogged filter of water pipe
9 Clogged plate heat exchanger
0 Locked water pump
1 Malfunction of water pump
Remote controller transmission error
(E0)/signal receiving error (E4)
Abnormal if main or sub remote controller cannot receive any transmission
normally from Interface unit/Flow temp.
controller of refrigerant address “0” for 3
minutes.
(Error code: E0)
Abnormal if sub-remote controller could
not receive any signal for 2 minutes.
(Error code: E0)
E0
or
E4
Case
Abnormal if Interface/Flow temp. controller board can not receive any data
normally from remote controller board or
from other Interface/Flow temp. controller board for 3 minutes. (Error code: E4)
Interface/Flow temp. controller board
cannot receive any signal from remote
controller for 2 minutes. (Error code: E4)
Remote controller control board
Abnormal if data cannot be read normally from the nonvolatile memory of the
remote controller control board.
(Error code: E1)
Judgment and action
1 Check facility of power supply.
2 Correct the wiring (U•V•W phase) to compressor. Refer to 8-6 (Outdoor power circuit
board).
3 Check outdoor fan.
4 Solve short cycle.
5 Replace outdoor controller circuit board.
6 Check compressor.
Refer to 8-4.
w Before the replacement of the outdoor
controller circuit board, disconnect the wiring
to compressor from the outdoor power circuit
board and check the output voltage among
phases, U, V, W, during test run. No defect
on board if voltage among phases (U-V, V-W
and W-U) is same. Make sure to perform the
voltage check with same performing frequency.
7~1 Check water circuit and repair the defect.
Contact failure at transmission
Check disconnection or looseness of
Interface unit/Flow temp. controller unit or
wire of remote controller
transmission wire of remote controller.
All remote controllers are set
Set one of the remote controllers “main”, If
as “sub” remote controller. In
there is no problem with the action above.
this case, E0 is displayed on
Check wiring of remote controller.
remote controller, and E4 is
• Total wiring length: max. 500 m
displayed at LED (LED1, LED2)
(Do not use cablex 3 or more.)
on the outdoor controller circuit
• The number of connecting remote controlboard.
ler: max. 2 units
Miswiring of remote controller
Defective transmitting receiving When it is not the above-mentioned problem of
circuit of remote controller
~
Noise has entered into the
Diagnose remote controllers.
a) When “RC OK” is displayed, remote contransmission wire of remote
trollers have no problem.
controller.
Turn the power off, and on again to check.
If abnormality generates again, replace
Interface/Flow temp. controller board.
b) When “RC NG” is displayed, replace
remote controller.
c) When “RC E3” or “ERC 00-66” is displayed, noise may be causing abnormality.
Defective remote controller
Abnormal if the clock function of remote
controller cannot be operated normally.
(Error code: E2)
E1
or
E2
17
Replace remote controller.
Error Code
E3
or
E5
E6
E8
E9
EF
Ed
Abnormal point and detection method
Case
Judgment and action
Remote controller transmission error
(E3)/signal receiving error (E5)
1 Abnormal if remote controller could not find
blank of transmission path for 6 seconds
and could not transmit.
(Error code: E3)
2 When remote controller receives the
transmitted data same time and compares
these data. Abnormal if the data is judged
to be different for 30 continuous times.
(Error code: E3)
1 2 remote controllers are set as 1 Set a remote controller to main, and the
“main.”
other to sub.
(In case of 2 remote controllers)
2 Defective transmitting receiving 2~4 Diagnose remote controller.
circuit of remote controller
a) When “RC OK” is displayed, remote controllers have no problem.
3 Defective transmitting receiving
Turn the power off, and on again to check.
circuit of Interface/Flow temp.
When becoming abnormal again, replace
controller board
indoor controller board.
4 Noise has entered into transb) When “RC NG” is displayed, replace
mission wire of remote controlremote controller.
ler.
1 Abnormal if Interface/Flow temp. controller
c) When “RC E3” or “ERC 00-66” is disboard could not find blank of transmission
played, noise may be causing abnormalpath. (Error code: E5)
ity.
2 When Interface/Flow temp. controller
receives the transmitted data same time
and compares these data. Abnormal if the
data is judged to be different for 30 continuous times. (Error code: E5)
Interface unit/Flow temp. controller-outdoor unit communication error (Signal
receiving error)
1 Abnormal if Interface/Flow temp. controller
board cannot receive any signal normally for
6 minutes after turning the power on.
2 Abnormal if Interface/Flow temp. controller
board cannot receive any signal normally for
3 minutes.
1 Contact failure, short circuit or, * Check LED display on the outdoor control circuit
miswiring (converse wiring) of
board. (Connect A-control service tool, PACInterface unit/Flow temp. conSK52ST.)
troller-outdoor unit connecting 1 Check disconnection or looseness of
wire
Interface unit/Flow temp. controller-outdoor
2 Defective transmitting receiving
unit connecting wire of Interface unit/Flow
circuit of Interface/Flow temp.
temp. controller or outdoor unit.
controller board
3 Defective transmitting receiving 2~4 Turn the power off, and on again to check.
circuit of Interface/Flow temp.
If abnormality generates again, replace
controller board
Interface/Flow temp. controller board or
outdoor controller circuit board.
4 Noise has entered into
Interface unit/Flow temp. controller-outdoor unit connecting
wire.
1 Contact failure of Interface unit/ 1 Check disconnection or looseness of
Flow temp. controller-outdoor
Interface unit/Flow temp. controller-outdoor
unit connecting wire
unit connecting wire of Interface unit/Flow
2 Defective communication circuit
temp. controller or outdoor unit.
of outdoor controller circuit board
2~4 Turn the power off, and on again to
3 Defective communication circuit of
check. Replace Interface/Flow temp. conInterface/Flow temp. controller board
4 Noise has entered into Interface unit/
troller board or outdoor controller circuit
Flow temp. controller-outdoor unit
board if abnormality is displayed again.
connecting wire.
Interface unit/Flow temp. controller1 Interface unit/Flow temp. con- 1 Check disconnection or looseness of
Interface unit/Flow temp. controller-outdoor
troller-outdoor unit connecting
outdoor unit communication error
unit connecting wire.
wire has contact failure.
(Transmitting error) (Outdoor unit)
(1) Abnormal if “0” receiving is detected 30 2 Defective communication circuit 2~4 Turn the power off, and on again to
of outdoor controller circuit board
check. Replace outdoor controller circuit
times continuously though outdoor conboard if abnormality is displayed again.
troller circuit board has transmitted “1”. 3 Noise has entered power supply.
4 Noise has entered Interface
(2) Abnormal if outdoor controller circuit
unit/Flow temp. controllerboard could not find blank of transmission
outdoor unit connecting wire.
path for 3 minutes.
Interface unit/Flow temp. controller-outdoor unit communication error (Signal
receiving error)
(Outdoor unit)
(1) Abnormal if outdoor controller circuit
board could not receive anything
normally for 3 minutes.
Non defined error code
This code is displayed when non defined
error code is received.
1 Noise has entered transmission 12 Turn the power off, and on again to check.
wire of remote controller.
Replace Interface/Flow temp. controller
2 Noise has entered Interface
board or outdoor controller circuit board if
unit/Flow temp. controllerabnormality is displayed again.
outdoor unit connecting wire.
Serial communication error
1 Wire disconnection or contact 12 Check connection of each connector CN2
Abnormal if serial communication between
and CN4 between the outdoor controller
failure of connector CN2
outdoor controller circuit board and outdoor
circuit board and the outdoor power circuit
between the outdoor controller
power circuit board is defective.
board.
circuit board and the outdoor
power circuit board
2 Wire disconnection or contact
failure of connector CN4
between the outdoor controller
circuit board and the outdoor
power circuit board
3 Defective communication circuit 3 Replace outdoor power circuit board.
of outdoor power circuit board
4 Defective communication circuit 4 Replace outdoor controller circuit board.
of outdoor controller circuit board
for outdoor power circuit board
18
Error Code
Abnormal point and detection method
P6
Judgment and action
Case
Freezing/overheating protection is working
(1) Freezing protection <Cooling mode>
Abnormal if plate heat exchanger pipe
temperature (TH6) stays at -5: or lower
for 10 seconds or abnormal if plate heat
exchanger pipe thermistor (TH6) stays at
-2: or lower and compressor operation
frequency is minimum for 5 minutes
after compressor starts operating for 6
minutes.
<Cooling mode>
12 Check water piping.
<Cooling mode>
1 Reduced water flow
· Clogged filter
· Leakage of water
2 Low temperature
· Low-load
· Inlet water is too cold.
3 Defective water pump
3 Check water pump.
4 Check outdoor fan motor.
4 Defective outdoor fan control
5~7 Check operating condition of refrigerant
5 Overcharge of refrigerant
(2) Overheating protection <Heating mode> 6 Defective refrigerant circuit
circuit.
Abnormal if condensing temperature of
(clogs)
pressure sensor (63HS) detects
7 Malfunction of linear expansion 7 Check linear expansion valve.
Tcond. : or more and compressor opervalve
ation frequency is less than or equal to
30 Hz. Detection is inoperative during
<Heating mode>
<Heating mode>
defrosting.
12 Check water piping.
1 Reduced water flow
· Clogged filter
· Leakage of water
2 High temperature
· Over-load
· Inlet water is too warm.
3 Check water pump.
3 Defective water pump
45 Check operating condition of refrigerant
4 Overcharge of refrigerant
circuit.
5 Defective refrigerant circuit
(clogs)
6 Malfunction of linear expansion 6 Check linear expansion valve.
valve
stage-a
stage-b
Tcond
stage-c
stage-d
stage-e
stage-f
stage-g
-19 -18
-16 -15
Tcond
P8
-13 -12
-11 -10
-8
-7
-3
-2
Ambient temperature (TH7) [ ]
stage-a stage-b stage-c stage-d stage-e stage-f stage-g
63
61
59
57
54
51
48
Pipe temperature
1 Leakage or shortage of
Abnormal if the following conditions are
refrigerant
detected for continuously 3 minutes after
compressor starts operating for 10 minutes. 2 Malfunction of linear
expansion valve
1. Cooling mode
T63HS-TH7 [ 2: and
3 Refrigerant circuit is clogged
TH3-TH7 [ 4: or T63HS-TH3 < 0: and
with foreign objects.
TH32-TH6 [ 0: and
Compressor operation frequency is 61Hz or more. w Clogging occurs in the parts
which become below freezing
2. Heating mode
point when water enters in
T63HS-TH32 [ 2: and
refrigerant circuit.
TH6-TH32 [ 1: and
TH7-TH3 [ 1: and
4 Disconnection of thermistor
Compressor operation frequency is 61Hz or more.
holder.
T63HS: Condensing temperature of pressure
sensor (63HS)
Thermistor
TH3: Liquid temperature
TH32: Inlet water temperature
TH6: Plate HEX Liquid temperature
TH7: Ambient temperature
UE
Abnormal pressure of pressure sensor 1 Disconnection or contact
(63HS)
failure of connector (63HS)
Abnormal if pressure sensor (63HS) detects
on the outdoor controller
0.1 MPa or less.
circuit board
Detection is inoperative for 3 minutes after 2 Defective pressure sensor
compressor starting and 3 minutes after
3 Defective outdoor controller
and during defrosting.
circuit board
19
1 Check intake superheat.
Check leakage of refrigerant.
2 Check linear expansion valve.
3 After recovering refrigerant, remove water
from entire refrigerant circuit under vacuum
more than 1 hour.
4 Check temperature display on outdoor
controller circuit board.
Temperature display is indicated by setting
SW2 of outdoor controller circuit board.
Check the holder of thermistor.
1 Check connection of connector (63HS) on
the outdoor controller circuit board.
Check breaking of the lead wire for thermistor
(63HS).
2 Check pressure by microcomputer.
(Pressure sensor/ 63HS)
(SW2: Refer to 8-7.)
3 Replace outdoor controller board.
Abnormal point and detection method
Error Code
Inlet water temperature
Abnormal if the following conditions are
detected for continuously 10 seconds.
PE
1. Cooling mode
During compressor operation
TH32 < 3:
2. Heating mode (exclude defrosting)
During compressor operation
TH32 < -10:
Judgment and action
Case
1 Reduced water flow
· Clogged filter
· Leak of water
2 Low temperature
· Low-load
· Low temperature inlet water
3 Defective water pump
12 Check water piping.
4 Leakage or shortage of
refrigerant
4 Check intake superheat.
Check leakage of refrigerant.
3 Check water pump.
3. Defrosting mode
During compressor operation
TH32 < 0:
Thermistor
TH32: Inlet water temperature
8-4. HOW TO CHECK THE PARTS
PUHZ-W85VHA
Check points
Parts name
TH3: Liquid pipe
Disconnect the connector then measure the resistance with a tester.
temperature
(At the ambient temperature of 10~30)
TH4: Discharge
Normal
Abnormal
temperature
TH4
160k~410k
TH6: Plate Hex liquid
pipe temperature
TH3
TH7: Ambient
TH6
4.3k~9.6k
Open or short
temperature
TH7
TH8: Heatsink
temperature
TH32
4.4k~9.8k
TH32: Inlet water
TH8
39k~105k
temperature
Fan motor (MF1)
Refer to the next page.
Solenoid valve coil
<Four-way valve>
(21S4)
Compressor
(MC)
Measure the resistance between the terminals with a tester.
(At the ambient temperature of 20)
Normal
Abnormal
2350±170
Open or short
Measure the resistance between the terminals with a tester.
(Winding temperature 20)
U
V
Normal
Abnormal
0.865~0.895
Open or short
W
Linear expansion valve Disconnect the connector then measure the resistance with a tester.
(LEV-A) (LEV-B)
(Winding temperature 20°C)
M
Gray
Orange
Red
Yellow
Black
1
2
3
4
5
6
Solenoid valve coil
<Bypass valve>
(SV)
Abnormal
Normal
Gray - Black
Gray - Red
Gray - Yellow
Gray - Orange
46±3Ω
Measure the resistance between the terminals with a tester.
(At the ambient temperature of 20)
Normal
Abnormal
1450±150
Open or short
20
Open or short
Check method of DC fan motor (fan motor / outdoor controller circuit board)
Notes
· High voltage is applied to the connector (CNF1) for the fan motor. Give attention to the service.
· Do not pull out the connector (CNF1) of the motor with the power supply on.
(It may damage the outdoor controller circuit board and fan motor.)
Self check
Symptom: The outdoor fan does not run.
Check fuse (F5) on outdoor controller
circuit board.
Is the fuse normal?
No
Replace fan motor.
Replace outdoor controller circuit board.
Yes
Wiring contact check
Check contact of fan motor connector
(CNF1)
No
Is there no contact failure?
Recover wiring.
Yes
Power supply check
Measure the voltage on the outdoor controller circuit. (The connector CNF1 is removed.)
TEST POINT
VDC DC 280-330 V (between 1 (+) and 4 (-) of CNF1)
VCC DC 15 V
(between 5 (+) and 4 (-) of CNF1)
Is the voltage normal?
Yes
Replace fan motor.
No
Check fan motor rotation.
Replace outdoor controller circuit board.
OK
END
NG
Replace outdoor controller circuit board.
Check fan motor rotation.
OK
END
NG
Replace fan motor.
21
8-5. HOW TO CHECK THE COMPONENTS
<Thermistor feature chart>
50
Low temperature thermistors
• Thermistor <Liquid pipe> (TH3)
• Thermistor <Plate Hex liquid pipe> (TH6)
• Thermistor <Ambient> (TH7)
Resistance (k)
40
Thermistor R0 = 15k' ± 3%
B constant = 3480 ± 2%
1
1
Rt =15exp{3480( 273+t – 273 )}
0:
10:
20:
25:
15k'
9.6k'
6.3k'
5.2k'
30:
40:
4.3k'
3.0k'
30
20
10
0
-20 -10 0 10 20 30 40 50
Temperature ()
200
Medium temperature thermistor
• Thermistor <Heatsink> (TH8)
Thermistor R50 = 17k' ± 2%
B constant = 4150 ± 3%
Resistance (k)
150
1
1
Rt =17exp{4150( 273+t – 323)}
0:
25:
50:
70:
90:
180k'
50k'
17k'
8k'
4k'
100
50
0
25
50
75
100
Temperature ()
125
500
High temperature thermistor
• Thermistor <Discharge pipe> (TH4)
Thermistor R120 = 7.465k' ± 2%
B constant = 4057 ± 2%
400
20: 250k'
30: 160k'
40: 104k'
50: 70k'
60: 48k'
Resistance (k)
1
1
Rt =7.465exp{4057( 273+t – 393)}
70:
34k'
80:
24k'
90: 17.5k'
100: 13.0k'
110: 9.8k'
300
200
100
0
22
25
50
75
Temperature ()
100
120
Low temperature thermistor
50
• Thermistor <Inlet water> (TH32)
Thermistor R0 = 15k' ± 2.5%
B constant = 3450 ± 2%
40
0:
10:
20:
25:
15k'
9.6k'
6.3k'
5.2k'
30:
40:
Resistance (k)
1
1
Rt =15exp{3450( 273+t – 273 )}
4.3k'
3.0k'
30
20
10
0
-20 -10
23
0 10 20 30 40 50
Temperature()
Linear expansion valve
(1) Operation summary of the linear expansion valve
• Linear expansion valve opens/closes through stepping motor after receiving the pulse signal from the outdoor controller board.
• Valve position can be changed in proportion to the number of pulse signal.
<Connection between the outdoor controller board and the linear expansion valve>
Outdoor controller board
DC12V
Gray
LEV
1
Drive circuit
3
M
2
1
5
4
Orange 3
Red
6
4
Yellow 5
Black
6
Connector LEV-A
LEV-B
<Output pulse signal and the valve operation>
Output
(Phase)
Output
1
2
3
5
4
6
8
1
ON ON OFF OFF OFF OFF OFF ON
2
OFF ON
3
OFF OFF OFF ON ON ON OFF OFF
4
OFF OFF OFF OFF OFF ON ON ON
ON ON OFF OFF OFF OFF
(2) Linear expansion valve operation
Valve position (capacity)
7
Opening a valve : 8
7
6
5
4
Closing a valve : 1
2
3
4
5
The output pulse shifts in above order.
3
6
2
7
1
8
8
1
• When linear expansion valve operation stops, all output phase
become OFF.
• When the switch is turned on, 700 pulse closing valve signal will be
sent till it goes to point in order to define the valve position. (The
pulse signal is being sent for about 20 seconds.)
• When the valve moves smoothly, there is no sound or vibration
occurring from the linear expansion valve: however, when the pulse
number moves from to or when the valve is locked, sound can
be heard.
No sound is heard when the pulse number moves from to in
case coil is burnt out or motor is locked by open-phase.
Close
Open
• Sound can be detected by placing the ear against the screw driver
handle while putting the screw driver to the linear expansion valve.
500 pulse
Opening a valve
all the way
Pulse number
Extra tightning (about 32 pulse)
24
(3) How to attach and detach the coil of linear expansion valve
<Composition>
Linear expansion valve is separable into the main body and the coil as shown in the diagram below.
Stopper
Main body
Coil
Lead wire
<How to detach the coil>
Hold the lower part of the main body (shown as A) firmly so that
the main body does not move and detach the coil by pulling it
upward.
Be sure to detach the coil holding main body firmly. Otherwise
pipes can bend due to pressure.
A
<How to attach the coil>
Hold the lower part of the main body (shown as A) firmly so that
the main body does not move and attach the coil by inserting it
downward into the main body. Then securely attach the coil stopper to main body. (At this time, be careful that stress is not added
to lead wire and main body is not wounded by lead wire.) If the
stopper is not firmly attached to main body, coil may be detached
from the main body and that can cause defective operation of linear expansion valve.
To prevent piping stress, be sure to attach the coil holding the
main body of linear expansion valve firmly. Otherwise pipe may
break.
Be sure to attach
the stopper.
A
25
8-6. TEST POINT DIAGRAM
Outdoor controller circuit board
CNS
S1-S2: 220-240 V AC
<CAUTION> TEST POINT 1 is high voltage.
VCC (TEST POINT 2)
VDC (TEST POINT 1)
63H
(voltage between pins of C6B): DC 15 V High pressure switch
(voltage between pins of C5E)
: DC 280 V-380 V
+
CNDC
DC 280 V -380 V
Connect from outdoor power circuit
board.
–}
Communication +
power supply
D71 Voltage
–
24 V DC
CNAC
2 to 4: Power supply
for outdoor controller
circuit board
(220-240 V AC)
1 to 3:
Power supply for
interface unit/Flow
temp. controlleroutdoor unit connection wire
(220-240 V AC)
VSP
(voltage between pins
of C5B): DC 0 V (when
stopped), DC 1 – 6.5 V
(when operated)
VFG
(voltage between right
pins of PC5D, pin 3
and pin 4)
CN2
TH32
Connect to the outdoor power circuit
board (CN2).
1-5:
Power circuit board
Transmitting signal
to the controller circuit
board
(0-5 V DC)
2-5: Zero cross signal
(0-5 V DC)
3-4: 18 V DC
6-5: 16 V DC
7-5: 16 V DC
[5: – 1,2,6,7: + ]
Thermistor
<Inlet water temperature>
TH6
Thermistor
<Plate Hex liquid
temperature>
TH7
<Ambient temperature>
TH3
Thermistor
<Liquid temperature>
TH4
Thermistor
<Discharge>
21S4
Four-way
valve
SV2
LEV-A,-B
Bypass valve
Linear expansion valve
SW8
Function switch
CN4
SW5
Transmission
to outdoor
power circuit
board (CN4)
Function switch
SW6
Model select
SW1
Forced defrost,
detect history
record reset
CN52C
Connect to the outdoor noise
filter circuit board. (CN52C)
SW10
SW2
Model select
Operation monitor function
26
Outdoor noise filter circuit board
LO, NO
Voltage of 220-240 V AC is output.
Connect to the outdoor power
circuit board (TABS, TABT).
E2
Connect to the
earth.
CNAC1, CNAC2
220-240 V AC
Connect to the outdoor controller circuit board (CNAC).
CN5
Input current
Connect to the
outdoor power
circuit board
(CN5).
EI
Connect to
the earth.
LI, NI
Voltage of 220-240 V AC is input.
Connect to the terminal block (TB1).
27
Outdoor power circuit board
Brief Check of POWER MODULE
w Usually, they are in a state of being short-circuited if they are broken.
Measure the resistance in the following points (connectors, etc.).
If they are short-circuited, it means that they are broken.
1. Check of diode bridge
TABP1-TABS, TABN1-TABS, TABP1-TABT,TABN1-TABT
2. Check of DIP-IPM
P-U, P-V, P-W, N-U, N-V, N-W
CN2
Connect to the outdoor controller circuit board
(CN2)
1-5: Transmitting signal to the outdoor
controller circuit board (0~5 V DC)
2-5: Zero cross signal (0~5 V DC)
3,4: 18 V DC
6-5: 16 V DC
7-5: 16 V DC
CNAF
Connect to ACTM
DIP-IPM
CNDC
280-380 V DC (1+, 3–)
Connect to the outdoor
controller circuit board
TABS/TABT
Connect to the
outdoor noise
filter circuit
board
Voltage among
phases:
220-240 V AC
CN3
Thermistor (TH8)
<Heatsink>
CN5
Detection of input
current
Connect to the
outdoor noise filter
circuit board (CN5)
TABP1
Connect to
ACTM +
CN4
Connect to the
outdoor controller
circuit board (CN4)
TABN1
Connect to
ACTM —
TABP2
Connect to the
ACTM
TABU/V/W
Connect to the compressor (MC)
Voltage among phases: 10 V ~180 V AC
28
TABN2
Connect to ACTM
Active filter module
P
Connect to the outdoor power
circuit board (TABP2)
L1, L2
Connect to the
DCL (Reactor)
N1
Non-connect
Upper
side
Lower
side
N2
Non-connect
+
Connect to the
outdoor power
circuit board
(TABP1)
Connect to the outdoor
power circuit board (TABN1)
Connect to the outdoor
power circuit board (CNAF)
1
: GND
2-1 : 15 V DC
3-1 : Control signal
4, 5 : Not used
6-1 : Control signal
Connection and internal circuit diagram
lo
Connect to the outdoor
power circuit board (TABN2)
DCL
L1
(+)
L2
ACTM
P
+
N1
N2
(- )
Io
29
Load
–
8-7. OUTDOOR UNIT OPERATION MONITOR FUNCTION
Operation indicator
SW2: Indicator change of self diagnosis
Unit
Explanation for display
Display detail
SW2 setting
ON
1 2 3 4 5 6
<Digital indicator LED3 working details>
(Be sure that the 1 to 6 in the SW2 are set to OFF.)
(1) Display when the power supply is ON.
When the power supply is ON, blinking displays by turns.
Wait for 10 seconds at the longest.
(2) When the display lights (Normal operation)
1 Operation mode display
1 second
interval
SW2
(Lighting)
ON
LED3
(Initial setting)
1 2 3 4 5 6
The ones digit : Relay output
Warming-up
Display
Compressor Compressor
The tens digit : Operation mode
Display
Operation Model
O
C
H
d
OFF
COOLING
HEATING
DEFROSTING
2 Display during error postponement
Postponement code is displayed when
compressor stops due to the work of
protection device.
Postponement code is displayed while
error is being postponed.
0
1
2
3
4
5
6
7
8
A
—
—
—
—
—
—
—
—
ON
ON
—
—
—
—
ON
ON
ON
ON
—
—
4-way valve
Solenoid valve
—
—
ON
ON
—
—
ON
ON
—
ON
—
ON
—
ON
—
ON
—
ON
—
—
(3) When the display blinks
Inspection code is displayed when compressor stops due to the work of protection devices.
Display Inspection unit
0
Display
F5
E8
E9
EA
Eb
EC
E0~E7
Outdoor unit
Display
U1
U2
U3
U4
U5
U6
U7
U8
U9
Ud
UF
UH
UP
P6
P8
UE
PE
Ed
Contents to be inspected (During operation)
Abnormal high pressure (63H worked)
Abnormal high discharging temperature, shortage of refrigerant
Open/short circuit of discharging thermistor (TH4)
Open/short of outdoor unit thermistors (TH3, TH32, TH6, TH7 and TH8)
Abnormal temperature of heatsink
Abnormality of power module
Abnormality of superheat due to low discharge temperature
Abnormality in outdoor fan motor
Voltage fault, Input current sensor error
Overheat protection
Compressor overcurrent interruption (When Comp. locked)
Current sensor error, Input overcurrent interruption
Compressor overcurrent interruption
Freezing/overheating protection is working.
Abnormality of pipe temperature
Abnormal pressure of pressure sensor
Abnormality of inlet water temperature
Serial communication error
Contents to be inspected (When power is turned on)
63H connector (yellow) is open.
Interface unit/Flow temp. controller-outdoor communication error (Signal receiving error) (Outdoor unit)
Interface unit/Flow temp. controller-outdoor communication error (Transmitting error) (Outdoor unit)
Miswiring of Interface unit/Flow temp. controller-outdoor unit connecting wire, excessive number of indoor units (2 units or more)
Miswiring of Interface unit/Flow temp. controller-outdoor unit connecting wire (converse wiring or disconnection)
Startup time over
Communication error except for outdoor unit
30
ON
Explanation for display
Display detail
SW2 setting
Pipe temperature / Liquid (TH3)
– 40~90
– 40~90
(When the coil thermistor detects 0: or below, “–”
and temperature are displayed by turns.)
(Example) When -10:;
0.5 secs. 0.5 secs. 2 secs.
1 2 3 4 5 6
Unit
:
10
Discharge temperature (TH4)
3~217
3~217
(When the discharge thermistor detects 100: or
more, hundreds digit, tens digit and ones digit are
displayed by turns.)
(Example) When 105:;
0.5 secs. 0.5 secs. 2 secs.
1
05
ON
1 2 3 4 5 6
ON
:
Fan steps
0~10
0~10
Compressor ON/OFF
0~9999
0~9999
(When the number of times is 100 or more,
hundreds digit, tens digit and ones digit are
displayed by turns.)
(Example) When 42500 times (425 100 times);
0.5 secs. 0.5 secs. 2 secs.
4
25
100 times
Compressor accumulated operation
hours
0~9999
0~9999
(When it is 100 hours or more, hundreds digit, tens
digit and ones digit are displayed by turns.)
(Example) When 2450 hours (245 10 hours);
0.5 secs. 0.5 secs. 2 secs.
2
45
10 hours
Compressor running current
0~50
0~50
Value after the decimal point will be round off
Compressor running frequency
0~225
0~255
(When it is 100 Hz or more, hundreds digit, tens
digit and ones digit are displayed by turns.
(Example) When 105 Hz;
0.5 secs. 0.5 secs. 2 secs.
1
05
Hz
0~500
(When it is 100 pulse or more, hundreds digit, tens
digit and ones digit are displayed by turns.
(Example) When 150 pulse;
0.5 secs. 0.5 secs. 2 secs.
1
50
Pulse
Step
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
A
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
LEV-A opening pulse
0~500
1 2 3 4 5 6
Deferred error history (1)
Deferred error
Blinking: being deferred
Lighting: deferment is cancelled
“00” is displayed in case of no deferment
ON
1 2 3 4 5 6
ON
Operation mode when the error occured. Operation mode when the unit is stopped due to is error
displayed. The displayed code is when the SW2 is set
as below.
(SW2) ON
1 2 3 4 5 6
1 2 3 4 5 6
31
Code
display
Code
display
SW2 setting
ON
Explanation for display
Unit
– 40~90
(When the coil thermistor detects 0: or below, “–”
and temperature are displayed by turns.)
(Example) When –15:;
0.5 secs. 0.5 secs. 2 secs.
15
:
Discharge temperature (TH4) when error 3~217
occured.
(When the temperature is 100: or more, the
3~217
hundreds digit, tens digit and ones digit are
displayed by turns.)
(Example) When 130:;
0.5 secs. 0.5 secs. 2 secs.
1
30
:
Display detail
Pipe temperature/Liquid (TH3) when
error occured.
– 40~90
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
Compressor current when error occured. 0~50
0~50
A
1 2 3 4 5 6
ON
Error code history (1) (latest)
Alternate display of faulty unit
number and error code
When no error history,
“ 0 ” and “– –” are displayed by turns.
Error code history (2)
Alternate display of faulty unit
number and error code
When no error history,
“ 0 ” and “– –” are displayed by turns.
Compressor operation duration
0~999
0~999
(When it is 100 minutes or more, the hundreds digit,
tens digit and ones digit are displayed by turns.)
(Example) When 245 minutes;
0.5 secs. 0.5 secs. 2 secs.
2
45
Minute
0~500
(When it is 100 pulse or more, hundreds digit, tens
digit and ones digit are displayed by turns.
(Example) When 150 pulse;
0.5 secs. 0.5 secs. 2 secs.
1
50
Pulse
Code
display
1 2 3 4 5 6
ON
Code
display
1 2 3 4 5 6
ON
1 2 3 4 5 6
LEV-B opening when error occured
ON
1 2 3 4 5 6
Capacity settings
ON
The outdoor capacity code is shown as below
Model
Code
14
PUHZ-W85VHA
1 2 3 4 5 6
32
Code
display
SW2 setting
ON
Explanation for display
Display detail
Plate HEX liquid pipe temperature (TH6) – 39~88
(When the temperature is 0: or less, “–” and
– 39~88
temperature are displayed by turns.)
Unit
:
1 2 3 4 5 6
ON
Condensing temperature (T63HS)
– 39~88
– 39~88
(When the temperature is 0: or less, “–” and
temperature are displayed by turns.)
:
1 2 3 4 5 6
ON
0~150
(When it is 100 Hz or more, hundreds digit, tens
digit and ones digit are displayed by turns.
(Example) When 105 Hz;
0.5 secs. 0.5 secs. 2 secs.
1
05
Calculated maximum frequency
0~150
1 2 3 4 5 6
ON
Hz
0~100
Water inlet temperature (TH32)
0~100
:
1 2 3 4 5 6
ON
Ambient temperature (TH7)
-39~88
-39~88
(When the temperature is 0: or less, “–” and
temperature are displayed by turns.)
:
1 2 3 4 5 6
Outdoor heatsink temperature (TH8)
-40~200
-40~200
(When the temperature is 0: or less, “–” and
temperature are displayed by turns.)
(When the thermistor detects 100: or more,
hundreds digit, tens digit and ones digit are
displayed by turns.)
ON
1 2 3 4 5 6
ON
Discharge superheat (SHd)
0~255
Cooling and Heating: SHd = TH4-T63HS
:
0~255
(When the SHd is 100°C or more, hundreds
digit, tens digit and ones digit are displayed by
turns.)
°C
0~130
(When the SC is 100°C or more, hundreds digit, tens
digit and ones digit are displayed by turns.)
°C
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
Sub cool (SC)
0~130
Cooling: SC = T63HS-TH3
Heating: SC = T63HS-TH6
0~500
(When it is 100 or more, hundreds digit, tens digit
and ones digit are displayed by turns.)
Input current of outdoor unit
0~500
0.1 A
1 2 3 4 5 6
33
SW2 setting
ON
LEV-B opening pulse
0~500
Unit
Explanation for display
Display detail
0~500
(When it is 100 pulse or more, hundreds digit, tens
digit and ones digit are displayed by turns.)
Pulse
1 2 3 4 5 6
U9 error detail history (latest)
Error details
(No error)
Over voltage
Insufficient
voltage
Input current
sensor error
ACTM error
ON
1 2 3 4 5 6
ON
Direct current bus voltage
150~400
Cause
–
Power PCB
Code
00
01
Power PCB
02
Control PCB
04
Control PCB
20
Code
display
150~400
(When it is 100V or more, hundreds digit, tens
digit and ones digit are displayed by turns.)
V
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
Capacity save
0 ~ 100
When there is no setting
of capacity save, “100” is
displayed.
0~100
(When the capacity is 100% hundreds digit, tens digit
and ones digit are displayed by turns.)
(Example) When 100%;
0.5 secs. 0.5 secs. 2 secs.
1
00
Deferred error history (2)
of outdoor unit
Deferred error code display
Blinking: being deferred
Lighting: deferment is cancelled
“00” is displayed in case of no deferment.
Deferred error history (3)
of outdoor unit
Deferred error code display
Blinking: being deferred
Lighting: deferment is cancelled
“00” is displayed in case of no deferment.
1 2 3 4 5 6
ON
%
Code
display
Code
display
1 2 3 4 5 6
ON
Error code history (3) (Oldest)
Faulty unit number and error code are
displayed alternately.
When no error history, “0” and “– –“ are displayed by
turns.
Error thermistor display
3: Liquid pipe thermistor (TH3)
3: Water inlet temp. thermistor (TH32)
6: Plate HEX liquid pipe thermistor (TH6)
7: Ambient temp. thermistor (TH7)
8: Heatsink thermistor (TH8)
Code
display
1 2 3 4 5 6
ON
1 2 3 4 5 6
When there is no error thermistor,
“–“ is displayed.
34
Code
display
SW2 setting
ON
1 2 3 4 5 6
ON
Explanation for display
Display detail
Operation frequency when error occured. 0~225
(When it is 100 Hz or more, hundreds digit, tens digit
0~225
and ones digit are displayed by turns.)
(Example) When 105 Hz;
0.5 secs. 0.5 secs. 2 secs.
1
05
Fan step when error occured.
0~10
Unit
Hz
0~10
Step
1 2 3 4 5 6
ON
0~500
(When it is 100 pulse or more, hundreds digit, tens
digit and ones digit are displayed by turns.)
(Example) When 130 pulse;
0.5 secs. 0.5 secs. 2 secs.
1
30
LEV-A opening pulse when error
occured.
0~500
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
Plate HEX liquid pipe temperature (TH6) -39~88
(When the temperature is 0°C or less, “–” and
when error occured.
temperature are displayed by turns.)
-39~88
(Example) When –15°C;
0.5 secs. 0.5 secs. 2 secs.
15
:
Condensing temperature when error
occured.
-39~88
-39~88
(When the temperature is 0°C or less, “–” and
temperature are displayed by turns.)
(Example) When –15°C;
0.5 secs. 0.5 secs. 2 secs.
15
:
Water inlet temperature (TH32) when
error occured.
0~100
0~100
Ambient temperature (TH7) when error
occured.
-39~88
-39~88
(When the temperature is 0°C or less, “–” and
temperature are displayed by turns.)
(Example) When –15°C;
0.5 secs. 0.5 secs. 2 secs.
15
:
Outdoor heatsink temperature (TH8)
when error occured.
-40~200
-40~200
(When the temperature is 0°C or less, “–” and
temperature are displayed by turns.)
(When the temperature is 100°C or more, hundreds
digit, tens digit and ones digit are displayed by
turns.)
:
Discharge superheat (SHd) when error
occured.
0~255
0~255
(When the temperature is 100°C or more, hundreds
digit, tens digit and ones digit are displayed by
turns.)
(Example) When 150°C;
0.5 secs. 0.5 secs. 2 secs.
1
50
1 2 3 4 5 6
ON
Pulse
:
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
Cooling and Heating: SHd=TH4-T63HS
1 2 3 4 5 6
35
:
SW2 setting
ON
1 2 3 4 5 6
ON
Cooling: SC = T63HS-TH3
Heating: SC = T63HS-TH6
Compressor operation duration before
the unit stops with error
0~999
1 2 3 4 5 6
ON
Maximum frequency when
error occured
0~150
1 2 3 4 5 6
ON
Explanation for display
Unit
0~130
(When the temperature is 100°C or more, hundreds
digit, tens digit and ones digit are displayed by
turns.)
(Example) When 115°C;
0.5 secs. 0.5 secs. 2 secs.
1
15
:
Display detail
Sub cool (SC) when error occured.
0~130
0~999
(When it is 100 minutes or more, hundreds digit, tens
digit and ones digit are displayed by turns.)
(Example) When 415 minutes;
0.5 secs. 0.5 secs. 2 secs.
4
15
0~150
(When it is 100 Hz or more, hundreds digit, tens
digit and ones digit are displayed by turns.
(Example) When 105 Hz;
0.5 secs. 0.5 secs. 2 secs.
1
05
Requested capacity step when error
occured
0~7
0~7
Compressor frequency control status
The following code will be a help to know the operating status of unit.
•Ten place (left side):
Minute
Hz
Step
1 2 3 4 5 6
Display Compressor frequency control
Input current restriction control
1
Compressor current restriction control
2
•First digit (Total figure of the corresponding relays
are displayed.)
ON
Display
1
2
4
8
1 2 3 4 5 6
Compressor frequency control
Discharge temp.control(not to over rise).
Condensing temp.control(not to over rise).
Freezing protection control
Heatsink temp.control(not to over rise).
Code
display
When the following 3 points are under control; LED
(1) Input current restriction control.
(2) Condensing temp. control (not to over rise).
(3) Heatsink temp. control (not to over rise).
ON
Requested capacity step (Q STEP)
0~7
0~7
Step
1 2 3 4 5 6
U9 Error details (To be shown while
error call is deferred.)
ON
1 2 3 4 5 6
Error details
(No error)
Over voltage
Insufficient
voltage
Input current
sensor error
ACTM error
36
Cause
–
Power PCB
Code
00
01
Power PCB
02
Control PCB
04
Control PCB
20
Code
display
8-8. FUNCTION OF SWITCHES
Switch
Mark No.
SW1
1
Forced
defrosting
2
To clear error
history
3
4
5
6
1
SW5
Selection
Function
2
3
4
1
2
No function
No function
No function
No function
Max. fan step
selection
Max. frequency
selection
No function
No function
Model Setting 1
Defrost control
selection
ON (with)
OFF (without)
ON to start
Usual setting
Initial setting*
Function details
Switch ON to force defrosting
OFF
ON to clear
Usual setting
OFF
Switch ON to clear (erase) the followings:
(1) Error codes and Suspension flags in RAM
(2) Error codes and Suspension flags in
EEPROM
Do NOT use
Do NOT use
Do NOT use
Do NOT use
PUHZ-W85VHA
PUHZ-W85VHA
PUHZ-W85VHA
PUHZ-W85VHA
OFF
OFF
OFF
OFF
–
–
STEP 9
STEP 8
OFF
Selection of max. fan step at the silent mode
Always
Middle level
Low level
OFF
Selection of max. compressor frequency at
the silent mode
Always
Do NOT use
Do NOT use
Do NOT use
For high
humidity
PUHZ-W85VHA
PUHZ-W85VHA
PUHZ-W85VHA
OFF
OFF
OFF
Standard
OFF
Model Setting 2
SW6
SW10
3 4 5 6 1 2
1 0 1 0 0 0
1=ON, 0=OFF
Off or operating
–
PCB may be damaged, if switch is ON.
Switch ON to change conditions (standard /
high himidity) to start defrosting
SW6
3~6
Effective timing
(SW1, 8) /
Note (SW6)
When compressor
is working in heating
mode. *1
–
ON for other models
–
Make sure to set
SW6-3 to 6 and
SW10-1,2 correctly
As shown in
the left table
–
OFF
–
Always
OFF
–
–
OFF
Power supply connection method selection
When power supply
ON
SW10 1,2
Energy saving
Powerful mode
mode
Do NOT use PUHZ-W85VHA
1
Mode selection
2
No function
Separate
Interface/Flow
Separate
temp. controllerpower supply
outdoor unit
power supplies
SW8
3
Outdoor unit
power supply
<Important Note>
All these dip switches on PUHZ-W85VHA are set as shown above.
Spare PCBs, however, will be supplied without any settings, which means that all dip switches are switched OFF.
When servicing, please make sure to set all switches correctly, referring to the previous PCB which is removed from the unit.
*1. Forced defrosting should be done as follows.
1 Change the DIP SW1-1 on the outdoor controller board from OFF to ON.
2 Forced defrosting will start by the above operation 1 if these conditions written below are satisfied.
• Heat mode setting
• 10 minutes have passed since compressor starts operating or previous forced defrosting is finished.
• Pipe temperature is less than or equal to 8:.
Forced defrosting will finish if certain conditions are satisfied.
Forced defrosting can be done if above conditions are satisfied when DIP SW1-1 is changed from OFF to ON.
After DIP SW1-1 is changed from OFF to ON, there is no problem if DIP SW1-1 is left ON or changed to OFF again.
This depends on the service conditions.
37
9
DISASSEMBLY PROCEDURE
PUHZ-W85VHA
OPERATING PROCEDURE
PHOTOS & ILLUSTRATION
1. Removing the service panel and top panel
(1) Remove 3 screws (5 x 10) and slide the hook on the right
downward to remove the service panel.
(2) Remove screws (3 for front, 3 for rear/5 x 10) of the top
panel and remove it.
Photo 1
Top panel fixing screws
Top panel
Slide
Service panel
Service panel
fixing screws
Fan grille
Grille fixing screws
2. Removing the fan motor (MF1)
Photo 2
Front panel
(1) Remove the service panel. (See photo 1.)
Propeller
(2) Remove the top panel. (See photo 1.)
(3) Remove 5 screws (5 x 10) to detach the fan grille.
(See photo 1.)
(4) Remove a nut (for right handed screw of M6) to detach the
propeller. (See photo 2.)
(5) Disconnect the connector CNF1 on controller circuit board
in electrical parts box.
Nut
(6) Remove 4 screws (5 x 25) to detach the fan motor.
(See photo 3.)
Photo 3
Fan
motor
Fan motor fixing screws (MF1)
Fan motor
fixing screws
Front panel fixing screws
3. Removing the electrical box
(1) Remove the service panel. (See photo 1.)
(2) Remove the top panel. (See photo 1.)
(3) Disconnect the connecting wires from terminal block.
(4) Remove all the following connectors from controller circuit board;
fan motor, linear expansion valve (x2), thermistor<Liquid pipe>,
thermistor <Discharge>, thermistor <Plate HEX Liquid>,
thermistor <Outdoor ambient>, high pressure sensor,
high pressure switch, four-way valve and bypass valve.
Then remove a screw (4 x 8) from the valve bed to remove
the lead wire.
Pull out the disconnected wire from the electrical parts box.
<Diagram symbol in the connector housing>
• Fan motor (CNF1)
• Linear expansion valve (LEV-A and LEV-B)
• Thermistor <Liquid pipe> (TH3)
• Thermistor <Discharge> (TH4)
• Thermistor <Plate HEX Liquid, Outdoor Ambient> (TH7/6)
• High pressure sensor (63HS)
• High pressure switch (63H)
• Solenoid valve coil <Four-way valve> (21S4)
• Solenoid valve coil <Bypass valve> (SV2)
(5) Remove the terminal cover and disconnect the compressor
lead wires.
(6) Remove a screw (4 x 10) and detach the electrical parts
box by pulling it upward. The electrical parts box is fixed
with 2 hooks on the left and 1 hook on the right.
38
Photo 4
Controller circuit board (C.B.)
Electrical parts box
Electrical parts box
fixing screw
(4 x 10)
PHOTOS & ILLUSTRATION
OPERATING PROCEDURE
4. Removing the thermistor <Plate HEX Liquid> (TH6)
(1) Remove the service panel. (See photo 1.)
(2) Remove the top panel. (See photo 1.)
(3) Disconnect the connector TH7/6 (red) on the controller
circuit board.
(4) Loosen the clamps for the lead wire.
(5) Pull out the thermistor <Plate HEX Liquid> (TH6) from
the sensor holder.
Note: In case of replacing thermistor <Plate HEX Liquid>
(TH6), replace it together with thermistor<Outdoor
ambient> (TH7), since they are combined together.
Refer to No.5 below to remove thermistor <Outdoor
ambient>.
5. Removing the thermistor <Outdoor ambient> (TH7)
(1) Remove the service panel. (See photo 1.)
(2) Remove the top panel. (See photo 1.)
(3) Disconnect the connector TH7/6 (red) on the controller
circuit board.
(4) Loosen the clamps for the lead wire.
(5) Pull out the thermistor <Outdoor ambient> (TH7) from
the sensor holder.
Photo 5
Plate HEX liquid
thermistor (TH6)
Outdoor liquid
thermistor (TH3)
Plate heat
exchanger
Receiver
Plate heat exchanger
fixing screw
Photo 6
Sensor holder for outdoor ambient thermistor (TH7)
Note: In case of replacing thermistor <Outdoor ambient>
(TH7), replace it together with thermistor <Plate HEX
Liquid> (TH6), since they are combined together.
Refer to No.4 above to remove thermistor <Plate HEX
Liquid>.
6. Removing the thermistor <Liquid pipe> (TH3) and
thermistor <Discharge> (TH4)
(1) Remove the service panel. (See photo 1.)
(2) Disconnect the connectors, TH3 (white) and TH4 (white),
on the controller circuit board.
(3) Loosen the clamps for the lead wire.
(4) Pull out the thermistor <Liquid pipe> (TH3) (See photo 5.)
and thermistor <Discharge> (TH4) from the sensor holder.
Photo 7
Discharge thermistor (TH4)
7. Removing the thermistor <Inlet Water> (TH32)
(1) Remove the service panel. (See photo 1.)
(2) Remove 2 screws (5 x 10) and remove the front cover
panel.
(3) Remove 2 screws (5 x 10) and remove the back cover
panel.
(4) Disconnect the connectors, TH32 (black) on the controller
circuit board.
(5) Loosen the clamp for the lead wire.
(6) Remove the thermistor <Inlet water> (TH32) from the plate
heat exchanger.
Note: Before removing the thermistor<Inlet water> (TH32),
recover water in the plate heat exchanger.
39
Photo 8
Plate heat
exchanger
Inlet water
thermistor (TH32)
PHOTOS & ILLUSTRATION
OPERATING PROCEDURE
8. Removing the solenoid valve coil <Four-way valve> (21S4)
linear expansion valve coil (LEV (A), LEV (B)) and solenoid
valve coil <Bypass valve> (SV)
(1) Remove the service panel. (See photo 1.)
(2) Remove the top panel. (See photo 1.)
(3) Remove the electrical parts box. (See photo 4.)
[Removing the solenoid valve coil <Four-way valve> ]
(4) Remove solenoid valve coil <Four-way valve> fixing screw
(M4 x 6).
(5) Remove the solenoid valve coil <Four-way valve>.
(6) Disconnect the connector 21S4 (green) on the controller
circuit board.
[Removing the linear expansion valve coil]
(4) Remove the linear expansion valve coil by sliding the coil
upward.
(5) Disconnect the connectors, LEV A (white) and LEV B (red),
on the controller circuit board.
[Removing the solenoid valve coil <Bypass valve>]
(4) Remove the solenoid valve coil <Bypass valve> fixing
screw (M4 x 6).
(5) Remove the solenoid valve coil <Bypass valve> by sliding
the coil upward.
(6) Disconnect the connector SV2 (blue) on the controller circuit board.
9. Removing the four-way valve
(1) Remove the service panel. (See photo 1.)
(2) Remove the top panel. (See photo 1.)
(3) Remove the electrical parts box. (See photo 4.)
(4) Remove 3 stay fixing screws (4 x 10) and remove the stay.
(5) Remove 3 right side panel fixing screw (5 x 10) in the rear
of the unit and remove the right side panel.
(6) Remove the solenoid valve coil <Four-way valve>.
(See photo 9.)
(7) Recover refrigerant.
(8) Remove the welded part of four-way valve.
Photo 9
Solenoid
valve coil (21S4)
Four-way valve
LEV-B
High pressure
switch
Photo 10
Solenoid
valve coil (SV)
Stay fixing
screw
Stay fixing
screw
Four-way
valve
10. Removing linear expansion valve
(1) Remove the service panel. (See photo 1.)
(2) Remove the top panel. (See photo 1.)
(3) Remove the electrical parts box. (See photo 4.)
(4) Remove 3 stay fixing screws (4 x 10) and remove the stay.
(5) Remove 3 right side panel fixing screw (5 x 10) in the rear
of the unit and then remove the right side panel.
(6) Remove the linear expansion valve.
(7) Recover refrigerant.
(8) Remove the welded part of linear expansion valve.
40
Bypass valve
Solenoid
valve coil (21S4)
Note 1: Recover refrigerant without letting it out in the air.
Note 2: The welded part can be removed easily by
removing the right side panel.
Note 3: When installing the four-way valve, make sure to
cover it with a wet cloth to prevent it from heating
(120°C or more), then braze the pipes so that the
inside of pipes are not oxidized.
Note 1: Recover refrigerant without spreading it in the air.
Note 2: The welded part can be removed easily by
removing the back panel.
Note 3: When installing the linear expansion valve, cover
it with a wet cloth to prevent it from heating
(120°C or more), then braze the pipes so that the
inside of pipes are not oxidized.
LEV-A
Stay fixing screw
PHOTOS & ILLUSTRATION
OPERATING PROCEDURE
11. Removing the bypass valve
(1) Remove the service panel. (See photo 1.)
(2) Remove the top panel. (See photo 1.)
(3) Remove the electrical parts box. (See photo 4.)
(4) Remove 3 right side panel fixing screws (5 x 10) in the rear
of the unit and remove the right side panel.
(5) Remove the bypass valve solenoid coil.
(6) Recover refrigerant.
(7) Remove the welded part of bypass valve.
Photo 11
Solenoid
valve coil (21S4)
Four-way valve
LEV-A
LEV-B
Note 1: Recover refrigerant without letting it out in the air.
Note 2: The welded part can be removed easily by removing
the right side panel.
Note 3: When installing the bypass valve, make sure to
cover it with a wet cloth to prevent it from heating
(120°C or more), then braze the pipes so that the
inside of pips are not oxidized.
12. Removing the high pressure switch (63H)
(1) Remove the service panel. (See photo 1.)
(2) Remove the top panel. (See photo 1.)
(3) Remove the electrical parts box. (See photo 4.)
(4) Remove 3 right side panel fixing screws (5 x 10) in the rear
of the unit and remove the right side panel.
(5) Pull out the lead wire of high pressure switch.
(6) Recover refrigerant.
High pressure
(7) Remove the welded part of high pressure switch.
switch
Note 1: Recover refrigerant without letting it out in the air.
Note 2: The welded part can be removed easily by
removing the right side panel.
Note 3: When installing the high pressure switch, make
sure to cover it with a wet cloth to prevent it from
heating (100°C or more), then braze the pipes so
that the inside of pipes are not oxidized.
13. Removing the high pressure sensor (63HS)
(1) Remove the service panel. (See photo 1.)
(2) Remove the top panel. (See photo 1.)
(3) Remove the electrical parts box. (See photo 4.)
(4) Remove 3 right side panel fixing screws (5 x 10) in the rear
of the unit and remove the right side panel.
(5) Pull out the lead wire of high pressure sensor.
(6) Recover refrigerant.
(7) Remove the welded part of high pressure sensor.
Note 1: Recover refrigerant without letting it out in the air.
Note 2: The welded part can be removed easily by
removing the right side panel.
Note 3: When installing the high pressure sensor, make
sure to cover it with a wet cloth to prevent it from
heating (100°C or more), then braze the pipes so
that the inside of pipes are not oxidized.
41
Bypass valve
Solenoid
valve coil (SV)
High pressure
sensor
PHOTOS & ILLUSTRATION
OPERATING PROCEDURE
14. Removing the compressor (MC)
(1) Remove the service panel. (See photo 1.)
(2) Remove the top panel. (See photo 1.)
(3) Remove 2 screws (5 x 10) and remove the front cover panel.
(4) Remove 2 screws (5 x 10) and remove the back cover panel.
(5) Remove the electrical parts box. (See photo 4.)
(6) Remove 3 screws (4 x 10) and remove the stay. (See photo 10.)
(7) Remove 3 screws (5 x 10) in the rear of the unit and
remove the right side panel.
(8) Remove 5 screws (1:4 x 10 4:5 x 10) and remove the front
panel.
(9) Remove 3 screws (4 x 10) and remove the separator.
(10) Remove the terminal cover and remove the lead wire for
compressor.
(11) Remove the soundproof cover for compressor.
(12) Recover refrigerant.
(13) Remove the 3 points of the compressor fixing nut using a
spanner or a adjustable wrench.
(14) Remove the welded pipe of the compressor, then remove
the compressor.
Note 1: Recover refrigerant without letting it out in the air.
Photo 12
Terminal cover
Lead wire for
compressor
Compressor
(MC)
Compressor
fixing nut
15. Removing the receiver
(1) Remove the service panel. (See photo 1.)
(2) Remove the top panel. (See photo 1.)
(3) Remove 2 screws (5 x 10) and remove the front cover panel.
(4) Remove 2 screws (5 x 10) and remove the back cover panel.
(5) Remove the electrical parts box. (See photo 4.)
(6) Remove 3 screws (4 x 10) and remove the stay. (See photo 10.)
(7) Remove 3 screw (5 x 10) in the rear of the unit and remove
the right side panel.
(8) Recover the refrigerant.
(9) Remove 2 welded pipes of receiver.
(10) Remove 2 receiver leg fixing screws (4 x 10), then remove
the receiver.
Photo 13
Note 1: Recover refrigerant without letting it out in the air.
Compressor
fixing nut
Photo 14
16. Removing the plate heat exchanger
(1) Remove the service panel. (See photo 1.)
(2) Remove the top panel. (See photo 1.)
(3) Remove 2 screws (5 x 10) and remove the front cover panel.
(4) Remove 2 screws (5 x 10) and remove the back cover panel.
(5) Remove the electrical parts box. (See photo 4.)
Plate HEX liquid
(6) Remove 3 screws (4 x 10) and remove the stay. (See photo 10.) thermistor (TH6)
(7) Remove 3 screw (5 x 10) in the rear of the unit and remove
the right side panel.
(8) Recover the refrigerant
(9) Remove 2 welded pipes of plate heat exchanger inlet and
outlet.
(10) Remove 2 plate heat exchanger fixing screws (4 x 10),
then remove the plate heat exchanger.
Receiver
leg fixing
screw
Outdoor liquid
thermistor (TH3)
Plate heat
exchanger
Receiver
Note 1: Recover refrigerant without letting it out in the air.
Note 2: Before removing the thermistor <Inlet water> (TH32),
recover water in the plate heat exchanger.
42
Plate heat exchanger
fixing screw
PHOTOS & ILLUSTRATION
OPERATING PROCEDURE
17. Removing the controller circuit board (C.B.): Figure 1
(1) Remove all lead wire connectors on controller circuit board (C.B.).
CNF1, CNDC, CNAC, CN2, CN4, CN52C,
21S4, SV2, 63H, 63HS, LEV-A, LEV-B,
TH32, TH7/6, TH3, TH4
(2) Remove controller circuit board from the C.B. base. (5 supports)
Figure 1
Active filter module (ACTM)
Electrical
parts box
Power circuit board (P.B.)
Reactor (DCL)
C.B. base
18. Removing the noise filter circuit board (N.F.): Figure 1, Photo 15
(1) Remove E2, CN5, LO, NO lead wire connectors from noise
filter circuit board (N.F.).
(2) Remove E1 lead wire connector from electrical parts box.
(3) Remove L, N lead wire connectors from terminal block (TB1).
(4) Remove 4 screws (4 x 10) for fixing the C.B. base and
detach the C.B. base from the electrical parts box.
(5) Remove CNAC1, CNAC2, E1, LI, NI lead wire connectors
from noise filter circuit board (N.F.).
(6) Remove noise filter circuit board from the C.B. base.
(11 supports)
19. Removing the power circuit board (P.B.) : Figure 1, Photo 16
(1) Remove CN2, CN4, CNDC lead wire connectors from controller circuit board (C.B.).
(2) Remove LO, NO, CN5 lead wire connectors from noise filter circuit board (N.F.).
(3) Remove 4 screws (4 x 10) for fixing the C.B. base and detach
the C.B. base from the electrical parts box.
(4) Remove all lead wire connectors on power circuit board (P.B.).
CNAF, CN2, CN3, CN5, CN4, CNDC
TABU, TABV ,TAVW, TABT, TABS, TABP1, TABN1, TABN2
(5) Remove power circuit board from the electrical parts box.
(3 supports and 4 screws ( 2 screws (3 x 12) + 2 screws (4
x 18))
20. Removing the active filter module (ACTM): Figure 1, Photo 16
(1) Remove CN2, CN4, CNDC lead wire connectors from controller circuit board (C.B.).
(2) Remove LO, NO, CN5 lead wire connectors from noise filter circuit board (N.F.).
(3) Remove 4 screws (4 x 10) for fixing the C.B. base and detach
the C.B. base from the electrical parts box.
(4) Remove all lead wires on active filter module (ACTM).
L1, L2, P, Io, +, -, CNAF (4 wires)
(5) Remove the active filter module (ACTM) from the electrical
parts box. (2 screws (4 x 14))
21. Removing the reactor (DCL): Figure 1, Figure 2
(1) Remove 4 reactor fixing screws (4 x 10) to detach the reactor (DCL).
(2) Disconnect L1, L2 lead wire from active filter module
(ACTM). Remove reactor wire from wire support.
22. Removing the thermistor <HEATSINK> (TH8): Photo 16
(1) Remove CN2, CN4, CNDC lead wire connectors from controller circuit board (C.B.).
(2) Remove LO, NO, CN5 lead wire connectors from noise filter circuit board (N.F.).
(3) Remove 4 screws (4 x 10) for fixing the C.B. base and detach
the C.B. base from the electrical parts box.
(4) Remove all lead wire connectors on power circuit board (P.B.).
CNAF, CN2, CN3, CN5, CN4, CNDC
TABU, TABV, TAVW, TABT, TABS, TABP1, TABN1, TABN2
(5) Remove power circuit board from the electrical parts box.
(3 supports and 4 screws (2 screws (3 x 12) + 2 screws (4 x 18))
(6) Remove the thermistor <HEATSINK> from the electrical
parts box. (1 screw (3 x 12))
43
Controller
circuit board
(C.B.)
Photo 15
Noise filter circuit
board (N.F.)
Noise filter circuit board (N.F.)
Photo 16
Active filter module (ACTM)
Power circuit board
(P.B)
Lead wire
for heatsink
thermistor
Terminal block
(TB1)
Figure 2
Reactor
fixing
screws
Wire support
Reactor
(DCL)
Reactor
fixing
screws
HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
©Copyright 2008 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.
Distributed in Apr. 2008 No. OCH439 PDF 8
Made in Japan
New publication, effective Apr. 2008
Specifications subject to change without notice.