Service Manual
Service Manual
MODEL: MUL36INV- 4 MUL42INV- 5
MUL CON Series
MUL FWCA Series
MUL DTA Series
CONTENTS
PRODUCT ..................................................................................................................
1 MODELS LIST ........................................................................................................................
1.1 Outdoor Unit ..................................................................................................................................................
1.2 Indoor Unit ......................................................................................................................................................
2 NOMENCLATURE ................................................................................................................
2.1 Nomenclature of Outdoor Unit .....................................................................................................................
2.2 Nomenclature of indoor unit .........................................................................................................................
3 FUNCTION ...............................................................................................................................
4 PRODUCT DATA ...................................................................................................................
4.1 Product data of outdoor .................................................................................................................................
4.2 Product data of indoor .................................................................................................................................
4.3 Working Temperature Range ........................................................................................................................
5 PIPING DIAGRAM ...............................................................................................................
CONTROL ................................................................................................................
1 OPERATION FLOWCHART ...............................................................................................
1.1 Cooling/Dehumidfying Operation ..............................................................................................................
1.2 Heating Operation .......................................................................................................................................
2 MAIN LOGIC .........................................................................................................................
2.1 Control Function of Outdoor Unit .............................................................................................................
2.2 Protection Function .....................................................................................................................................
2.3 Control Function of Indoor Unit ................................................................................................................
3 REMOTE CONTROLLER ...................................................................................................
3.1 Wired Remote Controller ...........................................................................................................................
3.2 Wireless Remote Controller.........................................................................................................................
INSTALLATION ......................................................................................................
1 PRECAUTIONS FOR INSTALLATION ...........................................................................
1.1 Precautions for Installation .........................................................................................................................
1.2 Key Points of Installation ...........................................................................................................................
2 FLOW CHART OF INSTALLATION..................................................................................
3 OUTDOOR UNIT INSTALLATION ....................................................................................
3.1 Before Installation .......................................................................................................................................
3.2 Installation Site .............................................................................................................................................
3.3 Caution for Installation...............................................................................................................................
3.4 Dimension Data ..........................................................................................................................................
3.5 Installation Clearance Data ........................................................................................................................
4 INDOOR UNIT INSTALLATION .......................................................................................
4.1 Installation of Duct Type.............................................................................................................................
4.2 Installation of Cassette Type.......................................................................................................................
4.3 Installation of Floor Ceiling Type .............................................................................................................
5 REFRIGERATION PIPING WORK ...................................................................................
5.1 Connection between Indoor and Outdoor Units........................................................................................
5.2 Refrigerant Charging and Trial Running ................................................................................................
6 ELECTRIC WIRING WORK...............................................................................................
6.1 Wiring Principle ...........................................................................................................................................
6.2 Electric Wiring Design .................................................................................................................................
6SHFL¿FDWLRQRI3RZHU6XSSO\:LUHDQG$LU6ZLWFK ................................................................................
MAINTENANCE ......................................................................................................
1 TROUBLE TABLE ................................................................................................................
1.1 Please check the following items before contact the maintenance serviceman.......................................
7KHFRQGLWLRQVOLVWHGEHORZDUHQRWFODVVL¿HGLQWRHUURUV .........................................................................
1.3 Error description .........................................................................................................................................
2 FLOW CHART OF TROUBLESHOOTING ......................................................................
3 WIRING DIADRAM ..............................................................................................................
3.1 Outdoor unit .................................................................................................................................................
3.2 Indoor unit ....................................................................................................................................................
4 DISASSEMBLY AND ASSEMBLY PROCEDURE OF MAIN PARTS ............................
4.1 Outdoor Unit .................................................................................................................................................
4.2 Indoor Unit ...................................................................................................................................................
5 EXPLODED VIEWS AND PART LIST ...............................................................................
5.1 Outdoor Unit ................................................................................................................................................
5.2 Indoor Unit ....................................................................................................................................................
PRODUCT
1
PRODUCT
PRODUCT
1 MODELS LIST
1.1 Outdoor Unit
Capacity
Units
Series
Model
MUL36INV- 4
Cooling
(kW)
Heating
(kW)
9.789
11
Power
Supply
Ref.
R410A
Outdoor
Unit
MUL42INV- 5
11.6
Appearance
220~ 240V-1Ph-50Hz
13
1.2 Indoor Unit
1.2.1 Duct type
Capacity
Units
Series
Duct Type
Indoor Unit
Model
Cooling
(kW)
Heating
(kW)
MUL09- DTA
2,5
2.80
MUL12- DTA
3,5
3,85
MUL18- DTA
5
5,50
MUL21- DTA
6.0
6.60
MUL24- DTA
7.1
8.00
Ref.
Power
Supply
R410A
220~ 240V
-1Ph-50Hz
Ref.
Power
Supply
R410A
220~ 240V
-1Ph-50Hz
Ref.
Power
Supply
R410A
220~ 240V
-1Ph-50Hz
Appearance
1.2.2 Cassette type
Units
Series
Cassette
Type
Indoor Unit
Capacity
Model
Cooling
(kW)
Heating
(kW)
MUL12- FWCA
3,5
3,85
MUL18- FWCA
5
5.50
MUL24- FWCA
7,1
8.00
Appearance
1.2.3 Floor ceiling type
Units
Series
Floor
Ceiling
Type
Indoor
Unit
2
Capacity
Model
Cooling
(kW)
Heating
(kW)
MUL09- CON
2.5
2.80
MUL12- CON
3.5
3.85
MUL18- CON
5.0
5.50
MUL24- CON
7.1
8.00
Appearance
PRODUCT
2 NOMENCLATURE
NO.
1
Description
Options
Name
Model
DTA: Duct type
FWCA: Cassette type
CON: Floor type
2
Product Type
3
Cooling Heating
:
H: Heat pump
4
Cooling Capacity
12 represents 12000Btu/h
1 kW = 3,412KBtu
5
Series
6
Power Supply
7
Refrigerant
8
Compressor Frequency
Series code
Voltage:
220-240V - 1Ph - 50Hz
R410A
DC inverter type
3
PRODUCT
3 FUNCTION
Function
For Comfortable
Air Conditioning
Duct type
Cassette type
Floor ceiling type
Fan operation Mode
Ɣ
Ɣ
Ɣ
Auto Swing Controller
-
Ɣ
Ɣ
Timer Selector
Ɣ
Ɣ
Ɣ
Auto Mode Operation
Ɣ
Ɣ
Ɣ
Cool Mode Operation
Ɣ
Ɣ
Ɣ
Heat Mode Operation
Ɣ
Ɣ
Ɣ
Dry Mode Operation
Ɣ
Ɣ
Ɣ
Fan Mode Operation
Ɣ
Ɣ
Ɣ
Sleep mode setting
Ɣ
Ɣ
Ɣ
Drain Pump
Ɣ
Ɣ
-
Wired Controller
Ɣ
Ɣ
Ɣ
Wiredless Remote Controller
Ɣ
Ɣ
Ɣ
For Flexible Control
Ɣ+DYH)XQFWLRQV
- :No Functions
4
PRODUCT
4 PRODUCT DATA
4.1 Product data of outdoor
Heat pump
MUL36 INV- 4
MUL42 INV- 5
Model
Code
Cooling
kW
9.789
11.6
Heating
kW
11
13
Capacity adjustment range
%
23% ~ 150%
19%~ 150%
EER
kW/kW
3.23
3.23
COP
kW/kW
3.65
3.67
Power supply
V-Ph-Hz
220~2400-1-50
220~2400-1-50
R410a
R410a
3.6
4.8
Brand
MITSUBISHI
MITSUBISHI
Type
DC inverter rotor type
DC inverter rotor type
Quantity
1
1
IP×4
IP×4
6*3
6*3
Brazing Connection
Brazing Connection
dB(A)
54
54
Capacity
Type
Refrigerant
Charge volume
Compressor
kg
Moisture protection
Wiring connection
Area*quantity
Connecting pipe
2
mm
Connection method
Sound pressure level
Outline dimension
W×D×H
mm
950×412×840
1015×440×1103
Package dimension
W×D×H
mm
1100×450×905
1155×490×1220
Net weight
kg
75
79
Gross weight
kg
80
88
Maximum drive IDU NO.
unit
4
5
Max. equivalent connection pipe length
m
70
80
20'GP
52
52
40' GP
108
48
40' HQ
108
48
Loading quantity
Notes:
a. The rated cooling capacity data is measured under the following work condition: Indoor Temperature is
27ć DB, 1 9ć WB. Outdoor Temperature is 35ć DB.The rated heating capacity data is measured under the following
work condition: Indoor Temperature is 20ć DB. Outdoor Temperature is 7ć DB, 6ć WB.
b. The data will change with the change of products. Refer to those parameters listed on nameplate.
c. Noise was tested in semi-silenced room, so the actual noise value will be a little higher for change of ambient.
5
PRODUCT
4.2 Product data of indoor
4.2.1 Duct Type
Model
Heat pump
MUL09- DTA
MUL12- DTA
MUL18- DTA
Cooling
kW
2.5
3.5
5.0
Heating
kW
2.80
3.85
5.50
Power supply
V-Ph-Hz
220 ~ 240-1- 50
220 ~ 240-1- 50
220 ~ 240-1- 50
Motor power input
kW
0.075
0.065
0.08
Capacity
3
m /h
450
500
700
CFM
265
294
412
dB(A)
37/31
39/32
40/33
kW
0.041
0.036
0.044
0.348
0.428
$LUÀRZYROXPH
Sound pressure level(H/L)
Fan motor
Connecting
pipe
Output
Running
current
Gas
A
0.406
inch
ƎPP
Liquid
inch
ƎĭPP
ƎĭPP
ƎĭPP
ƎĭPP
Flare Connection
Flare Connection
Flare Connection
mm
ĭ
ĭ
ĭ
mm
1.5
1.5
1.5
mm
700×200×615
700×200×615
900×200×615
mm
890×290×740
890×290×740
1120×290×740
kg
22
24
25
Connection method
External dia.
ļĭPP
Drain pipe
Thickness
Outline
W×D×H
dimension
Package
W×D×H
dimension
Net Weight
Gross weight
Loading quantity
Model
kg
27
29
30
20'GP
108
108
90
40' GP
234
234
192
40' HQ
234
234
192
Heat pump
Cooling
MUL21- DTA
kW
6.0
MUL24- DTA
7.1
Capacity
kW
6.60
8.00
Power supply
Heating
V-Ph-Hz
220~2400-1-50
220~2400-1-50
Motor power input
kW
0.11
0.11
3
m /h
1000
1000
CFM
588
588
dB(A)
42/34
42/34
kW
0.061
0.061
$LUÀRZYROXPH
Sound pressure level(H/L)
Output
Fan motor
Running current
A
0.588
0.588
Gas
inch
ƎĭPP
ƎĭPP
Liquid
inch
ƎPP
ƎPP
Flare Connection
Flare Connection
Connecting pipe
Connection method
External dia.
mm
ĭ
ĭ
Thickness
mm
1.5
1.5
Drain pipe
Outline dimension
W×D×H
mm
1100×200×615
1100×200×615
Package dimension
W×D×H
mm
1320×290×740
1320×290×740
Net Weight
kg
29
29
Gross weight
kg
35
35
20'GP
72
72
40' GP
162
162
40' HQ
162
162
Loading quantity
6
PRODUCT
4.2.2 Cassette type
Model
Heat pump
MUL12- FWCA
MUL18- FWCA
MUL24- FWCA
Cooling
kW
3.5
5
7.1
Heating
kW
3.85
5.5
8
Power supply
V-Ph-Hz
220~240-1-50
220~240-1-50
220~240-1-50
Motor power input
kW
0.07
0.07
0.1
m3/h
680
680
1180
CFM
400
400
694
dB(A)
42/38
42/38
45/41
Output
kW
0.0385
0.0385
0.055
Running current
A
0.374
0.374
0.535
Gas
inch
ƎPP
ƎĭPP
ƎĭPP
Liquid
inch
ƎĭPP
ƎĭPP
ƎĭPP
Flare Connection
Flare Connection
Flare Connection
Capacity
$LUÀRZYROXPH
Sound pressure level(H/L)
Fan motor
Connecting
pipe
Connection method
External dia.
mm
31
31
31
Thickness
mm
3
3
3
Body(W×D×H)
mm
840×840×190
840×840×190
840×840×240
Panel(W×D×H)
mm
950×950×60
950×950×60
950×950×60
Body(W×D×H)
mm
960×960×257
960×960×257
960×960×310
Panel(W×D×H)
mm
1040×1025×115
1040×1025×115
1040×1025×115
Body
kg
25
25
30
Panel
kg
6.5
6.5
6.5
Body
kg
33
33
38
Panel
kg
10
10
10
20'GP
72
72
72
40' GP
144
144
144
40' HQ
144
144
144
Drain pipe
Outline
Dimension
Package
Dimension
Net Weight
Gross Weight
Loading quantity
7
PRODUCT
4.2.3 Floor ceiling type
Model
Heat pump
MUL09- CON
MUL12- CON
Cooling
kW
2.5
3.5
Heating
kW
2.8
3.85
Power supply
V-Ph-Hz
220~240-1-50
220~240-1-50
Motor power input
kW
0.055
0.055
3
m /h
650.0
650.0
CFM
383.0
383.0
dB(A)
40/36
40/36
Output
kW
0.3
0.3
Running current
A
0.297
0.297
Gas
inch
ƎPP
Liquid
inch
ƎĭPP
ƎĭPP
Flare Connection
Flare Connection
Capacity
$LUÀRZYROXPH
Sound pressure level(H/L)
Fan motor
Connecting pipe
Connection method
ļĭPP
External dia.
mm
17
17
Thickness
mm
1.75
1.75
Outline dimension
W×D×H
mm
1220×700×225
1220×700×225
Package dimension
W×D×H
mm
1340×820×300
1340×820×300
Net Weight
kg
40.0
40.0
Gross weight
kg
50.0
50.0
20'GP
66
66
40' GP
132
132
40' HQ
132
132
Drain pipe
Loading quantity
Model
Heat pump
MUL18- CON
MUL24- CON
Cooling
kW
5
7.1
Heating
kW
5.5
8
Power supply
V-Ph-Hz
220~240-1-50
220~240-1-50
Motor power input
kW
0.11
0.11
3
m /h
950.0
1250
CFM
559.0
736
dB(A)
45/40
48/40
Output
kW
0.061
0.061
Running current
A
0.588
0.588
Gas
inch
ƎĭPP
ƎĭPP
Liquid
inch
ƎĭPP
ƎPP
Flare Connection
Flare Connection
Capacity
$LUÀRZYROXPH
Sound pressure level(H/L)
Fan motor
Connecting pipe
Connection method
External dia.
mm
17
17
Thickness
mm
1.75
1.75
Outline dimension
W×D×H
mm
122×700×225
1220×700×225
Package dimension
W×D×H
mm
1340×820×300
1340×820×300
Net Weight
kg
40.0
45
Gross weight
kg
50.0
54
20'GP
66
66
40' GP
132
132
40' HQ
132
132
Drain pipe
Loading quantity
8
PRODUCT
Notes:
a. The rated cooling capacity data is measured under the following work condition: Indoor Temperature is
27ć DB, 1 9ć WB. Outdoor Temperature is 35ć DB.The rated heating capacity data is measured under the following
work condition: Indoor Temperature is 20ć DB. Outdoor Temperature is 7ć DB, 6ć WB.
b. The data will change with the change of products. Refer to those parameters listed on nameplate.
c. Noise was tested in semi-silenced room, so the actual noise value will be a little higher for change of ambient.
4.3 Working Temperature Range
Indoor side state
Outdoor side stae
Dry bulb temp. ć
Wet bulb temp. ć
Dry bulb temp. ć
Wet bulb temp. ć
Rated Cooling
27
19
35
24
Max. cooling
32
23
48
26
Min. cooling
21
15
18
—
Rated Heating
20
15
7
6
Max. heating
27
—
24
18
Min. heating
20
15
ˉ 15
ˉ 16
Notes˖
a. The heating/cooling capacity and noise listed below are all measured before the shipment.
b. All parameters listed below are measured under the standard working conditions. If there is any change, the
parameters marked on the nameplate always prevail.
c. The heating capacity of the indoor unit just involves that of the heat pump but apart from that of the auxiliary
electric heater.
9
PRODUCT
5 PIPING DIAGRAM
Schematic Diagram of Multisplit Inverter Heat Pump
M
Schematic Diagram of Multisplit Inverter Heat Pump
The outdoor and indoor units start to work once the power is switched on. During the cooling operation, the low
temperature, low pressure refrigerant gas from the heat exchanger of each indoor unit gets together and then is taken
into the compressor to be compressed into high temperature, high pressure gas, which will soon go to the heat exchanger
of the outdoor unit to exchange heat with the outdoor air and then is turned into refrigerant liquid. After passing through
the throttling device, the temperature and pressure of the refrigerant liquid will further decrease and then go the main
valve. After that, it will be divided and go to the heat exchanger of each indoor unit to exchange heat with the air which
needs to be conditioned. Consequently, the refrigerant liquid become low temperature, low pressure refrigerant gas
again. Such a refrigeration cycle goes round and round to achieve the desired refrigeration purpose. During the heating
operation, the four-way valve is involved to make the refrigeration cycle run reversely. The refrigerant radiates heat in
the heat exchanger of the indoor unit (so do the electric heating devices) and absorb heat in the heat exchanger of the
outdoor unit for a heat pump heating cycle so as to achieve the desired heating purpose.
10
CONTROL
CONTROL
11
CONTROL
CONTROL
1 OPERATION FLOWCHART
Conn ecting To Power Supply
Initialization Of Bectronic
Expansion Valve
Volume:.Air Supply Direction
Start Indicating Ligh t:OFF
Start Indicating Light Is ON
Start/Stop
Stop
Display The Last Setting s Of
Air
Yes
Start Display:Flickering
Abno rmality Code Display
Start
Is The Protecting
No
Yes
Is The Start Indicating
Press The Start/ Stop Switch
No
Start Indicating Light ON
Air Volume Setting Display
Displaying
Air Supply Direction Setting
Display Displaying
Temperature Setting Display
Displaying
Start Display:OFF
Abno rmal Mode Display
Air Supply Blower:Stop
Electronic Expansion
Air Supply Or Temperature
Guide Louv er: Stop
Temperature
Adjustment
Cooling Of Heatig?
Coolin gH
Cooling Operation
eating
Heating Operation
A
12
Air Supply
Air Supply
Operation
CONTROL
1.1 Cooling/Dehumidfying Operation
Cooling Operation
There Is Not
Guide Louver
There Is
Guide Louvers Swing
Fan Motor: Operation
In The Process Of
Preventing Restart Operation?
(3 Minutes)
Yes
No
Temperature
Adjustment?
No
Fan Motor:Stop
Yes
Electronic Expansion Valve: Close
Electronic Expansion
Valve: Capacity Control
A
˄Go To The Previous Page˅
13
CONTROL
1.2 Heating Operation
Heating Operation
There Is Not
Guide Louver
There Is
Guide Louvers
Swing
In The Operation
Of Defrosting?
Yes
No
In The Process Of
Preventing Restart
Operation ? (3 Minutes )
Yes
No
Temperature
Adjustment ?
No
Yes
In The Process Of
Preventing Cold Air ?
Yes
No
Fan Motor :
As Per Set Air Supply
Speed
Fan Motor : Stop
Electronic Expansion
Valve: Capacity Control
A
14
Fan Motor : Stop
Fan Motor : Stop
Electronic
Expansion Valve :
Close
Electronic
Expansion Valve:
Defrosting Control
CONTROL
2 MAIN LOGIC
2.1 Control Function of Outdoor Unit
2.1.1 Cooling Mode
a. Cooling conditions and process:
If the compressor is in stop status and start the unit for cooling operation, when one of the indoor units reaches the
cooling operation condition, the unit start cooling operation; in this case, the electronic expansion valve, the outdoor fan
and the compressor start operation.
b. Stop in cooling operation
a) Compressor stops
The compressor stops gradually, the outdoor fan stops after 1min.
b) Some of the indoor units reach the stop condition (the compressor does not stop) The compressor operates
according to the required frequency. For the indoor unit with no requirement, the corresponding electronic expansion
valve is closed to 0P.
c. Cooling mode transfers to heating mode
When the unit transfers to heating mode, the 4-way valve is energized after the compressor runs for 40s. The other
disposals are the same as stopping in cooling mode.
d. 4-way valve:
In this mode, the 4-way valve is closed.
e. Outdoor fan control in cooling mode
The outdoor fan starts before 5s of the starting of compressor. The outdoor fan will run in high speed for 3min
after starting and then it will run in set speed.
The fan shall run at every speed for at least 80s. (When the quantity of running indoor unit is changed, the unit
will enter the control described in 1.3.5.1 and 1.3.5.2); When the compressor stops, the outdoor fan runs at present speed
and stops after 1min.
2.1.2 Dry Mode
a. The dry conditions and process are the same as those in cooling mode;
b. The status of 4-way valve: closed;
c. The temperature setting range: 16 ~ 30ć ;
d. Protection function: the same as those in cooling mode;
e. In dry mode, the maximum value A of the capacity requirement percentage of single unit is 90% of that in
cooling mode. The open condition of the electronic expansion valve, outdoor fan and compressor is the same as those in
cooling mode.
2.1.3 Heating Mode
a. Heating conditions and process: When one of the indoor units reaches the heating operation condition, the unit
starts heating operation.
b. Stop in heating operation:
a) When all the indoor units reach the stop condition, the compressor stops and the outdoor fan stops after 1min;
b) Some of the indoor units reach the stop condition The compressor reduces the frequency immediately and
operates according to the required frequency;
c) Heating mode transfers to cooling mode(dry mode), fan mode
The compressor stops;
The outdoor fan stops after 1min;
The status of 4-way valve: energized;
c. Outdoor fan control in heating mode
The outdoor fan starts before 5s of the starting of compressor and then it will run in high speed for 40s; The fan
shall run at every speed for at least 80s; When the compressor stops, the outdoor fan stops after 1min.
d. Defrosting function
When the defrosting condition is met, the compressor stops; the electronic expansion valve of all indoor units open
in big angle; the outdoor fan stops after the stop of the 4-way valve, meanwhile, the 4-way valve reverses the direction;
after the 4-way valve reverses the direction, the compressor starts; then begin to calculate the time of defrosting, the
frequency of the compressor rises to reach the defrosting frequency.
e. Oil-returned control in heating mode
a) Oil-returned condition
The whole unit is operating in low frequency for a long time
b) Oil-returned process in heating mode
The indoor unit displays “H1”
F2LOUHWXUQHG¿QLVKHGFRQGLWLRQLQKHDWLQJPRGH
The duration reaches 5min
15
CONTROL
2.1.4 Fan Mode
The compressor, the outdoor fan and the 4-way valve are closed; temperature setting range is 16 ̚ 30ć .
2.2 Protection Function
0RGH&RQÀLFW3URWHFWLRQRILQGRRUXQLW
When the setting mode is different of different indoor unit, the unit runs in below status:
D7KHPRGHRIWKH¿UVWRSHUDWLQJLQGRRUXQLWLVWKHEDVLFPRGHWKHQFRPSDUHWKHPRGHRIWKHRWKHULQGRRUXQLWV
WRVHHLIWKHUHLVDFRQÀLFW&RROLQJPRGHGU\PRGHLVLQFRQÀLFWZLWKKHDWLQJPRGH
E)DQPRGHLVLQFRQÀLFWZLWKKHDWLQJPRGHDQGWKHKHDWLQJPRGHLVWKHEDVLFPRGH1RPDWWHUZKLFKLQGRRUXQLW
RSHUDWHV¿UVWWKHXQLWZLOOUXQLQKHDWLQJPRGH
2.2.2 Overload Protection Function
When the tube temperature is a little low, the compressor raises the operation frequency; when the tube
temperature is a little high, the compressor frequency is restricted or lows down the operation frequency; when the tube
temperature is too high, the compressor protection stops running. If the discharge temperature protection continuously
appears for 6 times, the compressor can’t resume running. The compressor can resume running after cutting off the
power and then putting through the power. (if the running time of the compressor is longer than 7min, the protection
times record will be cleared)
2.2.3 Discharge Protection Function
When the discharge temperature is a little low, the compressor raises the operation frequency; when the discharge
temperature is a little high, the compressor frequency is restricted or lows down the operation frequency; when the
discharge temperature is too high, the compressor protection stops running. If the discharge temperature protection
continuously appears for 6 times, the compressor can’t resume running. The compressor can resume running after
cutting off the power and then putting through the power. (if the running time of the compressor is longer than 7min, the
protection times record will be cleared)
2.2.4 Communication malfunction
Detection of the quantity of installed indoor units: After 3min of energizing, if the outdoor unit does not receive
the communication data of certain indoor unit, the outdoor unit will judge that indoor unit is not installed and will treat
it as it is not installed. If the outdoor unit receives the communication data of that indoor unit later, the outdoor unit will
treat that unit as it is installed.
2.2.5 Compressor high-pressure protection
a. When the high-pressure switch is detected cut off for 3s continuously, the compressor will enter high-pressure
protection as it stops when reaching set temperature. Meanwhile, the outdoor unit will send the signal of “high-pressure
protection” to the indoor units;
b. After the appearance of high-pressure protection, when the high-pressure switch is detected closed for 6s
continuously twice an hour, the compressor can resume running only after cutting off the power and then putting
through the power.
2.2.6 Compressor low-pressure protection
a. Low Pressure Protection for Shutdown
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a low pressure protection signal will be send out.
If it is detected continuously for three seconds that the low pressure protection switch is opened after the
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pressure protection occurs twice in one hour, then it becomes unrecoverable and has to be recovered by powering the
outdoor unit again.
b. Low Pressure Protection during the Operation
a) When it is detected continuously for three seconds that the low pressure protection switch is opened, then the
whole unit should be shut off and a low pressure protection signal should be sent to the indoor unit.
b) On condition that a low pressure protection error occurs and the whole unit has stopped for more than three
minutes and it is detected continuously for six seconds that the low pressure protection switch is closed, then this error
can be eliminated. However, if the low pressure protection occurs twice in one hour, then it has to eliminate the error by
powering the outdoor unit again.
16
CONTROL
2.2.7 Compressor overload protection
If the compressor overload switch is detected having movement, the indoor unit will display the corresponding
malfunction as it stops when the indoor temperature reaching set temperature. When the compressor stops for more than
3min and the compressor overload switch is reset, the unit will resume operation status automatically. If the protection
appears for more than 6 times (if the running time of the compressor is longer than 30min, the protection times record
will be cleared), the unit can not resume operation status automatically, but can resume running only after cutting off the
power and then putting through the power.
2.2.8 Drive Error
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mode, and they will go to the piping test through the preset mode after they has run at the high fan speed for six minutes.
2.2.9 Refrigerant Recovery
The refrigerant can be recovered from either the indoor unit or the outdoor unit.
From the outdoor unit: it is available to recover the refrigerant from the outdoor unit by pressing “SW3”for a long
time period.
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minute to go the refrigerant recovery mode by pressing three times the “LIGHT” button on the wireless controller in
three seconds with “F0”displayed.
How to quit the refrigerant recovery:
When the refrigerant recovery has started, it will quit when the “SW3” is pressed down for a long time period or
there is a signal from the wireless controller or it has run for ten minutes.
2.2.10 Forcible Defrosting
How to activate this function: when indoor unit runs under the heating mode and at 16 ć , it will activate the
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2.2.11 Switchover of the Defrosting Modes
Under the unit is under the “Off” status, if “H1” is not displayed on the wireless controller, then the unit will go to
the defrosting mode 1 when it is turned on through the wireless controller.
Under the unit is under the “Off” status, if “H1” is displayed on the wireless controller, the unit will go the
defrosting mode 2 when it is turned on through the wireless controller.
Under the unit is under the “Off” status, it is available to switch over the defrosting mode 1 and defrosting mode 2
by pressing the “Mode” and “Blow” buttons simultaneously.
2.3 Control Function of Indoor Unit
2.3.1 Running Mode
1.COOL
2.DRY
3.HEAT
4.AUTO
5 FAN
2.3.2 Basic Functions of the System
a. COOL Mode
Under this mode, the fan and swing function goes as the set conditions, and the set temperature range is
16ć ~30ć .
b. DRY Mode
Under this mode, the fan will run at the low speed and the swing function is performed under the set conditions.
The set temperature range is 16~30ć .
c. FAN Mode
Under this mode, only the fan of the indoor unit runs. And if the auto speed is set, the fan will run under the same
condition as the COOL mode.
d. HEAT Mode
a) Under this mode, the set temperature rang is 16ć ~30ć .
b) The defrosting symbol “H1” will be displayed when the defrosting signal is received from the outdoor unit.
e. AUTO Mode
a) When the ambient temperature is higher than 25ć , the unit will run as the COOL mode.
b) For the cooling and heating unit, if the ambient temperature is or lower than2 0ć (72 ̧ ), the unit will run as
the HEAT mode.
c) When the indoor ambient temperature is higher than 20ć but lower than 25ć , the unit which starts to work
under the AUTO or DRY mode will shift to the FAN mode, while the unit which starts to work under other mode will
17
CONTROL
keep the current running mode.
f. 0RGH&RQÀLFW
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show the error code “E7”.
2.3.3 Other Control
a. Beeper Control
When the controller is powered on or it receives a valid either press button signal or remote control signal, the
beeper will utter a warning tone.
b. Auto Speed Control
Under the HEAT mode:
If the ambient temperature is equal or higher than the set temperature, the fan will run at the low speed;
If the ambient temperature minus 3ć is equal or lower than the set temperature, the fan will run at the medium
speed;
If the ambient temperature minus 3ć is lower than the set temperature minus 3ć , the fan will run at the high
speed.
Under the COOL mode:
If the ambient temperature is equal to or lower than the set temperature, the fan will run at the low speed;
If the ambient temperature is between the set temperature and the set temperature minus 3ć , the fan will run at
the medium speed;
If the ambient temperature is higher than the set temperature plus 3ć , the fan will run at the high speed.
Under the FAN mode:
The fan will run at the medium speed constantly.
Once the fan starts, its speed can not be changed unit it has run for at least 30 seconds at the currently set speed.
c. AUTO Press Button
The whole unit will run under the AUTO mode by pressing this button when the unit is off. In this condition, the
fan of the indoor unit will run at the auto speed with the swing function activated. When the unit is on, it will be turned
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d. Sleep
a) Under this mode, the proper sleep curve will be adopted in accordance with different set temperatures.
b) Sleep 1
Under the COOL mode or the DRY mode, the temperature will go up by 1ć after one hour and by another 1ć
after another hour, after that, the temperature will be kept on.
Under the HEAT mode, the temperature will go down by 1 ć after one hour and by another 1 ć after another
hour, after that, the temperature will be kept on.
c) Sleep 2
Sleep Curve under the COOL mode
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Sleep Curve under the HEAT mode
18
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Time/(Hour)
CONTROL
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Time/(Hour)
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How to set the sleep 3 curve:
1)When the sleep 3 mode is selected, press the “Timer” button to go to the setting status with “1 Hour” displayed
and the corresponding temperature of the sleep curve set last time displayed at the temperature area.
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3)Press the “Timer” button to increase the time by one hour, and the sleep curve temperature set last time will be
displayed at the temperature area.
4)Repeat the step 2 and step 3 until the temperature of eight hours has been set.
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e. Quiet
Quite Function: It is divided into the “Quiet” mode and “Auto Quiet” mode.
19
CONTROL
a) Under the “Quiet” mode, the low fan speed will be kept and is unchangeable.
b) Under the “Auto Quiet” mode, the fan speed changes in accordance with the difference of the indoor ambient
temperature and the set temperature.
f. Timer
a)Timer On
When the unit is powered on but in the idle condition, it is available to set when to start the unit. Then, when the
unit starts, it will run as the previously set mod. The set range of the timer is 0.5 ̚ 24 hours with a interval of 0.5 hour.
b) Timer Off
When the unit is on, it is available to set when to stop the unit. The set range of timer is 0.5 ̚ 24 hours with a
interval of 0.5 hour.
g. Memory
a) Memorizing Objects: modes (AUTO, COO, DRY, FAN, HEAT), swing, set temperature, set fan speed, etc.
b) When the indoor unit works without the wired controller, it will resume the working condition as the power
failure occurs after it is powered on again. When the indoor unit is with the wired controller, it is available to set the
memory function by pressing the corresponding buttons of the wired controller.
c) When the indoor unit works without the wired controller, if the timer is not set for the last remote control
instruction, the system will memorize this last instruction and works following it ; if the timer is set, it will be canceled
as the power failure occurs and will have to be reset.
d) When the indoor unit works with the wired controller, it will wok as the message sent by the wired controller
after it is powered on again.
h. Forcible Defrosting
When the unit is on and runs under the HEAT mode and at 16 ć set temperature, the indoor unit will go to the
forcible defrosting by pressing the “+”and“-”buttons alternatively on the wireless controller for five seconds and
meanwhile a forcible defrosting signal will be sent to the outdoor unit.
When the indoor unit receives a forcible defrosting signal from the outdoor unit, it will quit the forcible defrosting
setting and cease to sending the forcible defrosting single to the outdoor unit.
i. Selection of the Indoor Temperature Sensor
a)For the duct type indoor unit: Under the COOL, HEAT, DRY, or FAN mode, the return air temperature sensor is
adopted; while under the HEAT mode, it is the receiver temperature sensor.
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E:KHQWKHGXFWW\SHFDVVHWWHW\SHRUWKHÀRRUFHLOLQJW\SHLQGRRUXQLWZRUNVZLWKWKHZLUHGFRQWUROOHUWKH
ambient temperature sensor can be set in the following four ways:
ķ 01:The indoor temperature sensor is set for the return air.
ĸ 02:The indoor temperature sensor is set for the wired controller.
Ĺ 03:The indoor temperature sensor is set for the wired controller under the HEAT mode, and for the return air
under any other mode.
ĺ 04:The indoor temperature sensor is set for the return air under the HEAT mode, and for the wired controller
under any other mode.
c) Setting of the Ambient Temperature Sensor of the New Screen-Touch Wired Controller
When the unit is off, it is available to go to the debugging status by pressing the “Function” and “Timer” buttons
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IRXUNLQGVRIFRGHVZKLFKFDQEHDGMXVWHGWKURXJKWKH³ź´³Ÿ´EXWWRQ
The third one is the default code. The setting of the ambient temperature sensor of the wired controller should be
memorized.
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button press within 20 seconds, then the system will quit the setting and go to the normal “Off” status but with the
setting still saved.
j. Switchover of the Defrosting Mode
On condition that the unit is off, if “H1” is not displayed on the wireless controller, then the unit will go to the
setting status of the “Defrosting Mode 1”as it is turned on through the wired controller. Then, once the indoor unit
receives this signal, it will soon send it to the outdoor unit. In contract, if “H1”is displayed, the unit will go the setting
status of the “Defrosting Mode 2”, and the indoor unit also will send this signal to the outdoor unit as soon as it receives
it.
On condition that the unit is off, it is available to switch over the “Defrosting Mode 1” and “Defrosting Mode 2”
by pressing the “MODE” and “BLOW” buttons simultaneously.
20
CONTROL
k. Turbo
As soon as the controller receives the “Turbo” instruction, the fan of the indoor unit will run at the extreme high
speed and the fan of the outdoor unit will run at high cooling/heating frequency.
l. Blow
Blow Function:It is a function to automatically blow off the moist inside the exchanger of the indoor unit to
prevent mould growing after the unit is shut off.
a) On condition that this function is activated, when the “On/Off” press button is operated, the fan of the indoor
unit will still run for ten minutes (with the symbol “BLOW” displayed). At this time, the fan will stop as this function is
deactivated.
b) This function is unavailable under the AUTO, FAN, and HEAT modes.
21
CONTROL
3 REMOTE CONTROLLER
3.1 Wired Remote Controller
3.1.1 Wired Controller XK19
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Outside View of the Wired Controller
Outside View of the Wired Controller
LCD of the Wired Controller
LCD of the Wired Controller
No.
Symbols
1
Swing function.
2
Sleep function (3 types: sleep 1,sleep2 and sleep 3).
3
Running modes of the indoor unit (Cooling, Dry, Fan and Heating).
4
Defrosting function for the outdoor unit.
5
Gate-control function (this function is yet unavailable for this unit).
6
Lock function.
7
High, middle, low or auto fan speed of the indoor unit.
8
SHIELD
Shield functions (buttons, temperature, On/Off, Mode or Save is shielded or Save is shielded by the remote monitor.
9
TURBO
10
MEMORY
Memory function (The indoor unit resumes the original setting state after power failure and then power recovery).
11
MASTER
Master wired controller (this function is yet unavailable for this unit).
12
13
Turbo function.
It blinks under on state of the unit without operation of any button.
SAVE
14
Energy-saving function.
Ambient/preset temperature value.
15
E-HEATER
16
BLOW
17
22
Description
Electric auxiliary heating function.
Blow function.
Timing value.
18
QUITE
Quiet function (two types: quiet and auto quiet).
19
SET
It will be displayed under the debugging mode.
CONTROL
3.1.2 Buttons
Buttons on the Wired Controller
Buttons on the Wired Controller
Function of the Buttons
No.
Name
Function
ķFunction selection and cancellation.
ĸPress it for 5s to examine the outdoor ambient temperature.
1
Enter/cancel
2
Ÿ
6
ź
ķRunning temperature setting of the indoor unit, range:16 ̚ 30ć ĸTimer setting, range:0.5-24 hr.
ĹSwitchover between quiet/auto quiet or among sleep1/sleep2/sleep 3.
3
Fan
Setting of the high/middle/low/auto fan speed.
4
Mode
5
Function
7
Timer
Timer setting.
8
On/Off
Turn on/off the indoor unit.
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2 +6
Ÿź
Setting of the Cooling/Heating/Fan/Dry mode of the indoor unit.
Switchover among the functions of Swing/Sleep/Turbo/Save/E-heater/Blow /Quiet etc.
Press them for 5s under off state of the unit to enter/cancel the Memory function (If memory is set,
indoor unit after power failure and then power recovery will resume the original setting state.If not,
the indoor unit is defaulted to be off after power recovery. Memory off is default before delivery.).
By pressing them at the same time under off state of the unit, will be displayed on the wired
controller for the cooling only unit, while will be displayed on the wired controller for the cooling
and heating unit.
Upon startup of the unit without malfunction or under off state of the unit,press them at the same time
for 5s to enter the lock state, in which case, any other buttons won’t respond the press. Repress them
for 5s to quit this state.
3.1.3 Operation Instructions
ƹ On/Off
Press On/Off to turn on the unit and turn it off by another press.
ƹ Mode Setting
Under the “On” state of the unit, press Mode to switch the operation modes as the following sequence: CoolingDry-Fan-Heating.
ƹ Temperature Setting
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will be increased or decreased by 1ć every 0.5s
In the Cooling, Dry or Heating mode, the temperature setting range is 16ć̚ 30ć ,QWKH)DQPRGHWKHVHWWLQJWHPSHUDWXUHLV¿[HGDWć .
In the Auto mode, the setting temperature is unadjustable.
ƹ Fan Setting
Under the “On”/”Off” state of the unit, press Fan and then fan speed of the indoor unit will change circularly.
ƹ Timer Setting
Under the “On”/”Off” state of the unit, press Timer to set timer off/on.
Timer on setting: press Timer, and then LCD will display “xx.x hour”, with “hour” blinking. In this case, press
ŸRUźWRDGMXVWWKHWLPLQJYDOXH7KHQSUHVV(QWHUFDQFHOWRFRQ¿UPWKHVHWWLQJ
Timer off setting: press Timer, if LCD won’t display xx.x hour, and then it means the timer setting is canceled.
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23
CONTROL
them is pressed continuously, the set time will increase/ decrease by 0.5hr every 0.5s.
ƹ Swing Setting
Swing On: Press Function under on state of the unit to activate the swing function. In this case,
will blink.
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blinking.
Swing Off: When the Swing function is on, press Function to enter the Swing setting interface, with
After that, press Enter/cancel to cancel this function.
Note:
m. Sleep, Save, Turbo, Blow or Quiet setting is the same as the Swing setting.
n. After the setting has been done, it has to press the key “Enter/cancel” to back to the setting status or quit
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ƹ Sleep Setting
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Sleep off: When the Sleep function is activated, press Function to enter the Sleep setting interface. After that, press
Enter/cancel to can this function.
Sleep off is default after power failure and then power recovery, and the sleep functions is unavailable under the
fan mode.
There are three Sleep modes: Sleep 1, Sleep 2 and Sleep 3.
1) Sleep 1
In the Cooling or Dry mode, the temperature will increase by 1ć after the unit runs under Sleep 1 for 1hr and 1ć
after another 1hr.After that, the unit will run at this temperature.
In the Heating mode, the temperature will decrease by 1ć after the unit runs under Sleep 1 for 1hr and 1ć after
another 1hr. After that, the unit will run at this temperature.
1) Sleep 2
In the Cooling mode, the temperature may be set between 16ć -23ć , 24ć - 27ć or 28ć - 29ć or at 30ć .
(Note: The curve is only for reference, the actual temperature is subject to the time point.).
For example: The temperature in the Cooling mode is set at 25ć . Under the mode of Sleep 2, the temperature
will increase by 1 ć every 1hr. After it increases by 2 ć in total, it will keep at 27 ć . 7 hours later, it will decrease
by1ć , i.e. 26ć .After that, the unit will keep running at 26ć .
In the Heating mode, the temperature may be set at 16ć or between 17ć - 20ć , 21ć -27ć or 28ć - 30ć For example, the temperature in the Heating mode is set at 22ć .Under the mode of Sleep2, the temperature will
decrease by 1ć every 1hr. After it decreases by 2ć in total, i.e. 20ć ,the unit will keep running at 20ć 1) Sleep 3
Sleep curve setting under Sleep 3(DIY mode)
Under the mode of Sleep 3, press Timer to enter the Sleep setting. In this case, “1 HOUR” is displayed where the
timing value once is displayed and the corresponding temperature with the last Sleep curve setting is displayed where
the ambient/preset temperature once in displayed.
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Press Timer, time will automatically increase by 1hr, and the corresponding temperature with the last Sleep curve
setting is displayed where the ambient/preset temperature once is displayed.
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Notes:
a. During the above setting, if Function is pressed down or there is not any operation within 5s, sleep curve
setting will be canceled.
b. 26ć is the default Sleep curve temperature before delivery. The wired controller will automatically memorize
the Sleep curve after the setting.
ƹ Turbo Setting
Turbo function: The unit at the high fan speed can realize quick cooling or heating so that the room temperature
can quickly approach the setting value.
In the Cooling or Heating mode, press Function till the unit enters the Turbo setting interface and then press Enter/
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When the Turbo function is activated, press Function to enter the Turbo setting interface and then press Enter/
Cancel to cancel this function.
Notes:
a. When the Turbo function is activated, if the difference between the room temperature and set temperature is at
or below 2ć (detected in successive 1 min.), the Turbo function will be automatically deactivated.
b. Turbo function is unavailable in the Dry and Fan mode. And the Turbo function is off after power failure and
then power recovery. If Quiet function is on, Turbo function will be canceled subsequently.
ƹ Save Setting
Save: Energy saving which will result the air conditioner runs in smaller temperature range is realized by setting
24
CONTROL
lower limited value in the Cooling or Dry mode and upper limited value in the Heating mode.
Save Setting for Cooling:
Under the “On” state and in the Cooling or Dry mode of the unit, press Function to enter the Save setting interface
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the Save function. The initial lower limited value in the Cooling mode is 26ć .
When the Save function is activated, press Function to enter the Save setting interface and then press Enter/cancel
to cancel this function.
Save Setting for Heating:
Under on state or in the Heating mode of the unit, press Function to enter the Save setting interface and then press
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for heating. The upper initial limited value in the Heating mode is 20ć .
After the Saving function is activated, press Function to enter the Save setting interface and then press Enter/
Cancel to cancel this function.
Notes:
a. If press Function on the Save setting interface or if there is not any operation for 5s after last button press, the
Save setting will be canceled automatically by the system, with memorizing the present setting data.
b. When power is on after the power failure, the Save function will be memorized.
ƹ E-heater Setting
E-heater (auxiliary electric heating function): In the Heating mode, E-heater is allowed to be turned on for
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Once the wired controller or the remote controller enters the Heating mode, this function will be turned on
automatically.
Press Function in the Heating mode to enter the E-heater setting interface and then press Enter/cancel to cancel
this function.
Press Function to enter the E-heater setting interface, if the E-heater function is not activated, and then press Enter/
Cancel to turn it on.
ƹ Blow Setting
Blow function: After the unit is turned off, the water in evaporator of indoor unit will be automatically evaporated
to avoid mildew.
In the Cooling or Dry mode, press Function till the unit enters the Blow setting interface and then press Enter/
Cancel to active this function.
When the Blow function is activated, press Function to the Blow setting interface and then press Enter/Cancel to
cancel this function.
Notes:
a. When the Blow function is activated, if turning off the unit by pressing On/Off or by the remote controller, the
indoor fan will run at the low fan speed for 10 min, with “BLOW” displayed on the LCD. While, if the Blow function is
deactivated, the indoor fan will be turned off directly.
b. Blow function is unavailable in the Fan or Heating mode.
ƹ Quiet Setting
Quiet function consists of two kinds: quiet and auto quiet.
Press Function till the unit enters the Quite setting interface, with “Quiet” or “Auto” blinking. In this case, press
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When the Quiet function is activated, press Function till the unit enters the Quite setting interface, with “Quite” or
“Auto” blinking. Then press Enter/cancel to cancel this function.
Notes:
a. When the Quite function is activated, the fan speed is low and un-adjustable.
b. When the Auto Quite function is activated, the unit will run according to the difference between the room
temperature and the setting temperature. In this case, the fan speed is adjustable.
Difference between the room temperature and the setting temperature: the fan speed will keep its current state if
the temperature difference ı 4ć ; the fan speed will reduce one grade if 2ćİ the temperature difference İ 3ć ; the
fan speed will be at min. grade if the temperature difference İ 1ć .
c. When the Auto Quiet function is on, the fan speed can not be raised but reduced. If the high fan speed is
manually adjusted, the function will quit automatically.
d. There is not Auto Quiet function in the Fan or Dry mode. Quiet off is default after power failure and then
power recovery.
ƹ Other Functions
1) Lock
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time for 5s till the wired controller enters the Lock function. In this case, LCD displays . After that, repress these two
buttons at the same time for 5s to quit this function.
Under the Lock state, any other button press won’t get any response.
25
CONTROL
2) Memory
0HPRU\VZLWFKRYHU8QGHUWKH³2II´VWDWHRIWKHXQLWSUHVV0RGHDQGŸDWWKHVDPHWLPHIRUVWRVZLWFK
memory states between memory on and memory off. When this function is activated, Memory will be displayed. If this
function is not set, the unit will be under the “Off” state after power failure and then power recovery.
Memory recovery: If this function has been set for the wired controller, the wired controller after power failure
will resume its original running state upon power recovery. Memory contents: On/Off, Mode, set temperature, set fan
speed, Save function and Lock function.
3) Enquiry of the Outdoor Ambient Temperature
Under the “On” or “Off” state of the unit, press Enter/Cancel for 5s, and the outdoor ambient temperature will be
displayed after a sound of click. This enquiry state will quit by pressing Function or On/Off or during the temperature
adjustment. If there is not any operation for 10s, it will also quit automatically.
3.1.4 Errors
If there is an error occurring during the operation of the system, the error code will be displayed on the LCD. If
multi errors occur at the same time, their codes will be displayed circularly.
Note: In event of any error, please turn off the unit and contact the professionally skilled personnel.
26
Error
Error Code
High pressure protection
E1
Low pressure protection
E3
Discharge protection
E4
Over-current protection
P5
Communication error
E6
,QGRRUZDWHURYHUÀRZSURWHFWLRQ
E9
0RGHFRQÀLFW
E7
Anti-freezing protection
E2
Defrosting or oil returning for heating
H1
Indoor ambient temperature sensor open/short circuit
F1
Evaporator temperature sensor open/short circuit
F2
Indoor unit (liquid valve) refrigerant pipe inlet temperature sensor error
b5
Indoor unit (gas valve) refrigerant pipe outlet temperature sensor error
b7
Condenser coil inlet temperature sensor open/short circuit
A5
Condenser coil midway temperature sensor error
F4
Condenser coil outlet temperature senor open/short circuit
A7
Discharge air temperature sensor error
F5
Outdoor ambient temperature sensor error
F3
Module temperature sensor error
oE
Outdoor unit overall error
oE
CONTROL
3.2 Wireless Remote Controller
Wireless Remote Controller YT1F
Notes:
a. Be sure that there are no obstructions between the receiver and the remote controller;
b. Do not drop or throw the remote controller;
c. Do not let any liquid into the remote controller and expose the remote controller to direct sunlight or any place
where is very hot.
d. This is a general use remote controller. If press some button which is not available for the corresponding
function, the unit will keep the original running status.
3.2.1Function of Press Buttons:
ƹ ON/OFF ( )
Press this button to turn on/off the unit. After that, the sleep function will be canceled but the preset time is still
remained.
ƹ MODE
Auto, Cool, Dry Fan, Heat modes can be selected circularly by pressing this button. Auto mode is the default after
power on. Under Auto mode, the temperature will not be displayed. Under Heat mode, the initial value is 28ć (82 ̧ );
Under other modes, the initial value is 25ć (77 ̧ ).
ƹ SLEEP
Sleep On and Sleep Off can be selected by pressing this button. After powered on, the default is Sleep Off. After
the unit is turned off, the Sleep function is canceled. When the sleep function is set already, the symbol
will be
displayed. And at this time, the time of timer can be adjusted. Under Fan and Auto modes, this unction is not available.
ƹ FAN
Auto, Low, Middle, or High fan speed can circularly selected by pressing this button. After powered on, the
default is Auto speed. Under Dehumidifying mode, only Low fan speed is available.
ƹ CLOCK
The clock can be set up by pressing this button, with the symbol displayed and blinking. In such a case, pressing
ˇ or ˉ within 5 seconds can adjust the value. If the button is pressed down for more than 2 seconds, the value on ten’s
place will increase by 1 in every 0.5 seconds. After that, repressing this button and then symbol stops blinking, which
indicates the setting is made successfully. After powered on, the default value is 12:00 with
displayed. Once the
symbol is displayed, the current time is the Clock value; otherwise it is the Timer value.
ƹ LIGHT
Light On and Light Off can be set by pressing this button when the unit is at On or Off status. After powered on,
27
CONTROL
the default is Light On.
ƹ TURBO
In Cool or Heat mode, pressing this button can activate or deactivate this function. When this function is on, its
symbol will be displayed. Any change of either mode or fan speed will make this function canceled automatically.
ƹ BLOW
BlOW On and BLOW Off can be set by pressing this button. In Cool and Dehumidifying modes, press this button
to activate this function and then “BLOW” will be displayed. After that, it can be canceled by repressing this button.
After powered on, the default is Blow Off. If the ON/OFF button is operated or the unit is switched to the Cool or
Dehumidifying mode, it will keep its original status. When the unit is turned off, Only Blow Off is available. Under
Auto, Fan or Heat mode, this function is unavailable.
ƹ ˉ
The preset temperature can be decreased by pressing this button. If the button is pressed down for more than 2
seconds, the temperature will be decreased quickly until it is released, with ć( ̧ ) displayed al the time. Under Auto
mode, the temperature adjustment is unavailable.
ƹ ˇ
The preset temperature can be increased by pressing this button. If the button is pressed down for more than 2
seconds, the temperature will be increased quickly until it is released, with ć ( ̧ ) displayed all the time. Under Auto
mode, the temperature adjustment is unavailable. The setting range is 16-30 ć or 61-86 ̧
ƹ TEMP
It can be decided by pressing this button which temperature will be displayed, indoor set temperature, or indoor
ambient temperature. When the indoor unit is powered on, the indoor set temperature will be displayed, while if the
status is changed to , the indoor ambient temperature will be displayed. However, the indoor set temperature will be
displayed again when the controller receives other remote controls signals. Without setting this function, the default is
the indoor set temperature.
ƹ SWING UP/DOWN ( )
The swing angle which circularly changes as below can be selected by pressing this button:
This kind of remoter controller is universal. And the three swing statuses of
are the same as that of .
If the swing function is deactivated when the air guide louver is swing up and down, it will stop at the current
position.
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ƹ AIR ( )
AIR ON or Air OFF can be selected by pressing this button.
ƹ TIMER ON
“ON” will be displayed and blink for 5 seconds by pressing this button, and soon adjust the time by pressing ˇ or
ˉ within 5 seconds. Each press will make the time increased or decreased by 1 minute. If the button is pressed down
IRUPRUHWKDQVHFRQGVWKHWLPHZLOOEHFKDQJHGTXLFNO\LQVXFKDZD\¿UVWO\WKHYDOXHRQWKHRQH¶VSODFHLVFKDQJHG
and then is the value on the ten’s place. Once Timer ON has been set already, it can be canceled by repressing it. Before
the setting, please adjust the CLOCK to the current actual time.
ƹ TIMER OFF
TIME OFF can be activated by pressing this button, with “OFF” blinking. The method of setting is the same as
that for TIMER ON.
ƹ HEALTH ( )
This function can be activated or deactivated by pressing this button. After the unit is turned on, the default is
HEALTH ON.
ƹ I FEEL
This function can be activated by pressing this button and canceled by another press. When this function is on, the
I FEEL information will be sent out in 200ms after each operation on the controller and the remote controller will send
the temperature information to the main controller every 10 minutes.
3.2.2 Guide for General Operation
1) After powered on, press ON/OFF and then the unit will start to run. (Note: when powered off, the guide louver
of the main unit will close automatically).
2) Press MODE to select the desired running mode.
3) Press ˇ or ˉ to set the desired temperature (it is unnecessary to set the temperature under the AUTO mode.)
4) Press FAN to set the fan speed, AUTO, LOW, MID, or HIGH.
to select the swing angle.
5) Press
28
CONTROL
3.2.3 Guide for Optional Operation
ƹ About BLOW
This function indicates that moisture in the evaporator of the indoor unit will be dried after the unit is stopped to
avoid mould.
a. BLOW ON: When press the ON/OFF button to turn off the unit, the indoor fan will continue running for about
another 10 minutes at the low speed. In this case, the indoor fan can be stopped directly by pressing the button BLOW.
b. BLOW OFF: When press the ON/OFF button to turn off the unit, the whole unit will be stopped completely.
ƹ About AFTERHEAT BLOW
Under the Heat mode or Auto Heat mode, if the unit is turned off, the compressor and outdoor fan will stop
running immediately and the upper and lower guide board will rotate to the horizontal position, while the indoor fan will
still run at the low fan speed. Then, 10 seconds later, the unit will stop completely.
ƹ About AUTO RUN
When AUTO RUN is selected, the setting temperature will not be displayed on the LCD and the unit will choose
the suitable running mode automatically in accordance with the room temperature.
ƹ About TURBO
If this function is activated, the unit will run at super-high fan speed to cool or heat quickly so that the ambient
temperature will approaches the preset temperature as soon as possible.
29
MAINTENANCE
54
MAINTENANCE
MAINTENANCE
1 TROUBLE TABLE
WARNING ʽ
a. In the event of abnormal conditions (like, stinky smell), please shut off the main power supply immediately
and then contact the appointed service center; otherwise the continuous abnormal running would damage the air
FRQGLWLRQLQJXQLWDQGDOVRZRXOGFDXVHHOHFWULFVKRFNRU¿UHKD]DUGHWF
b. Do not repair the air conditioning personally but instead contact the professionally skilled personnel at the
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1.1 Please check the following items before contact the maintenance service man
Conditions
The unit does not run
The unit stops soon
after it starts
Cooling/Heating is abnormal
Causes
Corrective Actions
Broken fuse or opened breaker
Change the fuse or close the breaker
Power off
Restart the unit when power on
Loosened power supply plug.
Plug the power supply properly.
,QVXI¿FLHQWEDWWHULHVYROWDJH
of the remote controller
Change new batteries
Remoter controller out of the control scope
Keep the control distance within 8 meters.
Clogged inlet/outlet of the indoor/outdoor unit
Clear the obstacle
Clogged inlet/outlet of the indoor/outdoor unit
Clear the obstacle
Improperly set temperature
Adjust the setting of the remote or wired controller.
Too low set fan speed
Adjust the setting of the remote or wired controller.
Incorrect air direction
Adjust the setting of the remote or wired controller.
Opened door and window
Close the door and window
Direct sunlight
Hang a curtain or blinds over the window.
Too much people in the room
Too much heat sources in the room
Reduce the heat sources
'LUW\¿OWHUVFUHHQ
&OHDQWKH¿OWHUVFUHHQ
Note:
If the air conditioner still runs abnormally after the above check and handling, please contact the maintenance
serviceman at the local appointed service center and also give a description of the error occurred as well as the model of
the unit
7KHFRQGLWLRQVOLVWHGEHORZDUHQRWFODVVL¿HGLQWRHUURUV
Conditions
Causes
When restart the unit soon after it is stopped.
The overload protection switch of the unit
let the startup delayed for three minutes.
As soon as power is on.
The unit will stand by for approximate one minute.
When the cooling operation starts.
The hi-humidity air indoor is cooled quickly.
The unit “clatters” as soon as it starts running.
It is the sound generated during the initialization
of the electronic expansion valve.
The unit “swishes” during the cooling operation.
It the sound when the refrigerant gas runs inside the unit.
The unit “swishes” when it is started or stopped.
It is the sound when the refrigerant gas stops running.
The unit “swishes” when in it is and
after the running.
It is the sound when the draining system is operating.
The unit “squeaks” when it is in and
after the running.
It is the sound of frication generated by the skin plate
etc which swells due to the temperature change.
The unit blows
out dust.
When the unit restarts after it is not
used for a long time.
The dust inside the unit is blown out again.
The unit emits odors.
When the unit is running.
The odors absorbed in are blown out again.
The unit does not run
The unit blows out mist
The unit generates
noise
55
MAINTENANCE
1.3 Error description
If some error occurs when the unit is running, the error code will be displayed on the wired controller and the main
board
of the outdoor unit.See the table before for more details about the meaning of each error.
Indicating Lamp
Lamp Panel
"88" Display
(Floor Ceiling
Type)
Wired
Controller
Display
/
/
/
/
/
/
/
Flash 3
times
Flash 3
times
Flash 3
times
/
oE
ON
/
/
/
/
/
Short/open circuit
of he liquid valve
temperature sensor
Shown as
Table 16
/
Flash 19
times
/
b5
b5
Short/open circuit
of the gas valve
temperature sensor
Short/open circuit of the gas
valve temperature sensor
Shown as
Table 16
/
Flash 22
times
/
b7
b7
5HIULJHUDQWLQVXI¿FLHQF\
or blockage protection
(available for the
residential outdoor unit)
5HIULJHUDQWLQVXI¿FLHQF\
or blockage protection
(available for the
residential outdoor unit)
F0
/
Flash 10
times
/
oE
oE
Short/open circuit of
the indoor ambient
temperature sensor
Short/open circuit of
the indoor evaporator
Short/open circuit of the
of the outdoor ambient
temperature sensor
Short/open circuit of
the temperature sensor
at the midway of the
condenser coil ( for
the commercial unit)
Short/open circuit of
the outdoor discharge
temperature sensor
Short/open circuit of
the indoor ambient
temperature sensor
Short/open circuit of
the indoor evaporator
Short/open circuit of the
of the outdoor ambient
temperature sensor
Shown as
Table 16
/
Flash
once
/
F1
F1
Shown as
Table 16
/
Flash
twice
/
F2
F2
F3
/
Flash 3
times
/
F3
F3
Short/open circuit of the
temperature sensor at the
midway of the condenser coil
( for the commercial unit)
F4
/
Flash 4
times
/
F4
F4
Short/open circuit of
the outdoor discharge
temperature sensor
F5
/
Flash 5
times
/
F5
F5
Oil returning in cooling
Oil returning in cooling
F7
/
/
/
/
/
System high pressure
protection
System high pressure
protection
E1
Anti-freezing protection
Anti-freezing protection
E2
System low pressure
protection (reserved)
Compressor discharge
high temperature
protection
Whole unit overcurrent protection
Communication error
between the indoor
and outdoor units
System low pressure
protection
E3
Compressor discharge high
temperature protection
Residential AC Errors
Commerical AC Errors
Outdoor Unit
"88" Display
Running
Cooling
Heating
/
Defrosting mode 1
08
/
/
/
Defrosting mode 2
0A
/
/
heating overload protection
0C
/
Normal running
Short/open circuit
of the liquid valve
temperature sensor
0RGHFRQÀLFW
Overload protection
Whole unit overcurrent protection
Communication error
between the indoor
and outdoor units
0RGHFRQÀLFW
Overload protection
Flash
once
Flash
twice
Flash 3
times
/
/
E1
E1
/
/
E2
E2
/
/
E3
E3
E4
Flash 4
times
/
/
E4
E4
E5
Flash 3
times
Flash 3
times
Flash 3
times
oE
oE
Shown as
Table 16
Flash 6
times
/
/
E6
E6
Shown as
Table 16
Flash 7
times
Flash 3
times
/
/
E7
E7
Flash 3
times
Flash 3
times
oE
oE
/
/
/
/
/
/
Flash
Flash
E9
E9
Quick
ÀDVK
Quick
ÀDVK
Quick
ÀDVK
Quick
ÀDVK
Quick
ÀDVK
dd
dd
/
Fo
Fo
Flash 3
times
Flash 3
times
Flash 3
times
oE
oE
/
Quick
ÀDVK
/
P0
/
Quick
ÀDVK
P0
E8
Anti cold blow protection
/
/
Indoor unit water
RYHUÀRZHUURU
Trial run/trial operation
Trial run/trial operation
dd
Refrigerant recovery mode
Fo
IPM Drive module resetting
P0
Refrigerant
recovery mode
Drive module
resetting(for the
commercial unit)
Min. cooling/heating
(capability test code)
56
E9
Cooling IPLV test
P0
Cooling IPLV test
/
P0
MAINTENANCE
Mid. Cooling/heating
(capability test code)
Phase over-current
protection
Drive board
communication error(for
the commercial unit)
Short/open circuit
of the of the module
temperature sensor
Module temperature
protection
AC contact protection
(for the commercial unit)
Circuit sensor error
Transducer connection
protection (for the
commercial unit)
AC current
protection(input side)
Temperature drift
protection (for the
commercial unit)
Drive board ambient
temperature sensor error
(for the commercial unit)
DC link high voltage
protection
DC link low voltage
protection
Cooling level AA
performance test
Level AA cooling
performance test
Compressor overcurrent protection
Communication error
between the inverter driver
to the main controller
Short/open circuit
of the of the module
temperature sensor
Module temperature
protection
/
Quick
ÀDVK
/
/
P5
Flash 3
times
Flash 3
times
Quick
ÀDVK
Flash 3
times
P6
Flash 3
times
Flash 3
times
P7
Flash 3
times
P3
P8
/
P3
P3
P3
oE
oE
Flash 3
times
oE
oE
Flash 3
times
Flash 3
times
oE
oE
Flash 3
times
Flash 3
times
Flash 3
times
Flash 3
times
Flash 3
times
Flash 3
times
Flash 3
times
Flash 3
times
Flash 3
times
oE
oE
oE
oE
oE
oE
AC contact protection
P9
Circuit sensor error
Pc
Transducer connection
protection
Pd
Flash 3
times
Flash 3
times
Flash 3
times
oE
oE
AC current
protection(input side)
PA
Flash 3
times
Flash 3
times
Flash 3
times
oE
oE
Temperature drift protection
PE
Flash 3
times
Flash 3
times
Flash 3
times
oE
oE
Drive board ambient
temperature sensor error
PF
Flash 3
times
Flash 3
times
Flash 3
times
oE
oE
Flash 3
times
Flash 3
times
Flash 3
times
Flash 3
times
Flash 3
times
Flash 3
times
Flash 3
times
Flash 3
times
Flash 3
times
Flash 3
times
Flash 3
times
Flash 3
times
Flash 3
times
Flash 3
times
Flash 3
times
oE
oE
oE
oE
oE
oE
oE
oE
oE
oE
/
/
Flash
once
H1
Defrosting
symbol
displayed
DC link low voltage
protection
DC link high voltage
protection
PL
PH
/
Abnormal AC input voltage
PP
Capacitor charging error
Capacitor charging error
PU
Jumper terminal
error protection
Jumper terminal
error protection
C5
Defrosting or oil
returning in heating
Defrosting or oil
returning in heating
H1
/
Forcible defrosting
H1
Compressor thermal
overload protection.
Modulecurrent protection
(namely
IPM protection)
Compressor
desynchronizing
Compressor overload
protection.
H3
IPM Module current
protection
H5
Compressor desynchronizing
H7
Quick
ÀDVK
Flash 3
times
/
/
H1
H1
Flash 3
times
Flash 3
times
oE
oE
Flash 3
times
Flash 3
times
Flash 3
times
oE
oE
Flash 3
times
Flash 3
times
Flash 3
times
Flash 3
times
Flash 3
times
Flash 3
times
oE
oE
oE
oE
Flash 20
times
/
/
oE
oE
Flash 3
times
Flash 3
times
Flash 3
times
Flash 3
times
Flash 3
times
Flash 3
times
oE
oE
oE
oE
LE
Flash 3
times
Flash 3
times
Flash 3
times
oE
oE
Over speed
LF
Flash 3
times
Flash 3
times
Flash 3
times
oE
oE
Short/open circuit of the
temperature sensor at the
inlet of the condenser coil
( for the commercial unit)
/
A5
/
/
/
/
/
Short/open circuit of
the temperature sensor
at the outlet of the
condenser coil ( for
the commercial unit)
/
A7
/
/
/
/
/
Memory card error
/
EE
/
/
/
/
/
PFC Protection
PFC Protection
HC
Too high power protection
(available for the
residential outdoor unit)
Too high power protection
(available for the
residential outdoor unit)
L9
Compressor startup failure
Compressor startup failure
Lc
Compressor phase failure/
reverse protection
Compressor rotation
failure(for the
commercial unit)
Over speed (for the
commercial unit)
Compressor phase failure/
reverse protection
Compressor rotation
failure(for the
commercial unit)
Ld
57
Frequency limitation/
degradation for module
circuit protection
(for phase circuit)
/
En
/
/
/
/
/
Frequency limitation/
degradation for module
temperature protection
/
EU
/
/
/
/
/
Frequency limitation/
degradation for overload
/
F6
/
Flash 6
times
/
/
/
Frequency limitation
/degradation for
circuit protection of
the whole unit
/
F8
/
Flash 8
times
/
/
/
Frequency limitation/
degradation for module
circuit protection
(for phase circuit)
/
F9
/
Flash 9
times
/
/
/
Frequency limitation/
degradation for antifreezing protection
/
FH
/
Flash 2
times
Flash 2
times
/
/
No indoor fan motor
/
H6
Flash 11
times
/
/
/
/
/
/
/
/
/
/
/
/
Compressor
demagnetizing protection
/
HE
/
/
Flash
14
times
Indoor and outdoor
units unmatched
/
LP
Flash 19
times
/
/
Compressor phase
circuit detection error
/
U1
/
/
DC link voltage drop error
/
U3
/
/
Zero detection
circuit error
/
U8
Flash 17
times
/
/
/
/
Nominal cooling/heating
(capability test code)
/
P1
/
/
/
/
/
Max. cooling/heating
(capability test code)
/
P2
/
/
/
/
/
Flash
12
times
Flash
20
times
The words in gray means the corresponding function is unavailable.
Error Code
Error Description
Error Code
Error Description
Error Code
Error Description
13
Unit A indoor unit pipe outlet
temperature sensor error
23
Unit B indoor unit pipe outlet
temperature sensor error
33
Unit C indoor unit pipe outlet
temperature sensor error
14
Unit A indoor pipe inlet
temperature sensor error
24
Unit B indoor pipe inlet
temperature sensor error
34
Unit C indoor pipe inlet
temperature sensor error
15
Unit A indoor ambient
temperature sensor error
25
Unit B indoor ambient
temperature sensor error
35
Unit C indoor ambient
temperature sensor error
16
8QLW$PRGHFRQÀLFW
26
8QLW%PRGHFRQÀLFW
36
8QLW&PRGHFRQÀLFW
17
Unit A anti-freezing
protection
27
Unit B anti-freezing
protection
37
Unit C anti-freezing protection
41
Unit D communication error
46
8QLW'PRGHFRQÀLFW
54
Unit E indoor pipe inlet
temperature sensor error
42
Unit D indoor pipe midway
temperature sensor error
47
Unit D anti-freezing
protection
55
Unit E indoor ambient
temperature sensor error
43
Unit D indoor unit pipe outlet
temperature sensor error
51
Unit E communication error
56
8QLW(PRGHFRQÀLFW
44
Unit D indoor pipe inlet
temperature sensor error
52
Unit E indoor pipe midway
temperature sensor error
57
Unit E anti-freezing protection
45
Unit D indoor ambient
temperature sensor error
53
Unit E indoor unit pipe outlet
temperature sensor error
C5
Jumper terminal error
58
MAINTENANCE
Error description of outdoor refrigerant pipe detection function
Wiring error or component error
Unit which is detecting
Unit which isn’t detecting
5E
01
**
02
**
03
**
04
**
05
**
Indoor unit gas pipe
connection error
or component error
Unit which is detecting
--
5P
01
--
02
--
03
--
04
--
05
--
5E
5E
5E
5E
5P
5P
5P
5P
Outdoor Unit: MUL36INV- 4 and MUL42INV- 5
(Note: Refer to the real products for the exact position of each component.)
Once errors are displayed on the controller, please shut off the air conditioning unit and contact the professionally
skilled personnel for troubleshooting.
59
MAINTENANCE
2 FLOW CHART OF TROUBLESHOOTING
Service personnel shall collect the malfunction information as much as possible and research them thoroughly, list
WKHVHHOHFWULFDOSDUWVZKLFKPD\FDXVHPDOIXQFWLRQVHUYLFHSHUVRQQHOVKDOOEHDEOHWRGHWHUPLQHWKHVSHFL¿FUHDVRQDQG
solve the faulted parts.
Observe the status of the complete device and do not observe the partial
,WLVDGYLVHGWRVWDUWIURPWKHVLPSOHRSHUDWLRQGXULQJDQDO\]LQJMXGJLQJDQGFRQ¿UPLQJPDOIXQFWLRQUHDVRQWKHQ
FRQGXFWWKHFRPSOLFDWHGRSHUDWLRQVVXFKUHPRYDORIGHYLFHSDUWUHSODFHPHQWDQGUHIULJHUDQW¿OOLQJ
Find the malfunction reason carefully as unit may occur several malfunction at the same time and one malfunction
may develop into several malfunction, so entire system analysis shall be established to make the judged result exact and
credible.
ƹ Malfunction display: E1 Compressor High Pressure Protection
High pressure protection
Y
N
Check if the pressure is really high pressure with the
measurement of a manometer
Check if pressure switch is
normal
N
Replace the outdoor
unit mainboard
Y
Y
Replace pressure switch
Check if operation mode of indoor unit is
properly set
N
Refer to Instruction
Manual of indoor unit
Y
Check if gas valve and liquid valve are
completely open
N
Completely open the
valve
Y
Check if the panel of outdoor unit is
firmly closed?
N
Close the panel
Y
Check if the air return and supply from heat
exchanger of indoor unit and outdoor unit is
smooth
N
Remove the barrier
Y
N
Check if indoor unit fan and outdoor unit fan
run
Measure the fan motor and
signal input
Y
N
Check if swing louver of indoor unit is
completely open
Measure swing motor and
signal input
Y
N
Check if there is filth blockage to indoor/
outdoor filter or heat exchange fin
Refer to Care and Maintenance
Y
System pipeline is blocked
60
N
Mainly check the inlet and outlet of main pipe connecting with each indoor unit and
capillary of indoor and outdoor units. Replace the parts like filter, capillary and so on.
MAINTENANCE
ƹ Malfunction display: E3 Compressor Low Pressure Protection
High pressure protection
Y
N
Check if the pressure is really high pressure with the
measurement of a manometer
Check if pressure switch is
normal
N
Replace the outdoor
unit mainboard
Y
Y
Replace pressure switch
Check if operation mode of indoor unit is
properly set
N
Refer to Instruction
Manual of indoor unit
Y
Check if gas valve and liquid valve are
completely open
N
Completely open the
valve
Y
Check if the panel of outdoor unit is
firmly closed?
N
Close the panel
Y
Check if the air return and supply from heat
exchanger of indoor unit and outdoor unit is
smooth
N
Remove the barrier
Y
N
Check if indoor unit fan and outdoor unit fan
run
Measure the fan motor and
signal input
Y
N
Check if swing louver of indoor unit is
completely open
Measure swing motor and
signal input
Y
N
Check if there is filth blockage to indoor/
outdoor filter or heat exchange fin
Refer to Care and Maintenance
Y
System pipeline is blocked
N
Mainly check the inlet and outlet of main pipe connecting with each indoor unit and
capillary of indoor and outdoor units. Replace the parts like filter, capillary and so on.
61
MAINTENANCE
ƹ Malfunction display: E4 Compressor Exhaust High Temperature Protection
Discharge temperature protection
Y
Measure if compressor’s discharge
temperature has reached115
N
Measure if temperature sensor’s
resistance value is correct
Y
Y
System pipeline leaks so complementation is
needed. Please add refrigerant according to the
amount specified in the nameplate
Replace the outdoor
unit mainboard
ƹ Malfunction display: E5 Compressor Overheat
Abnormal overcurrent
Y
Check if compressor’s connection line
is properly connected
N
Adjust compressor’s
connection line
Y
N
Replace overcurrent
protector
Check if current value is higher than the
protector’s setting
Y
N
Refer to high pressure
protection
If unit’s high pressure is normal
Y
N
If voltage is normal
Y
R eplace mainboard
62
Contact the power
supply company
N
Replace relevant
discharge temperature
sensor
MAINTENANCE
ƹ Malfunction display: E9 Full Water Protection
Full Water Protection
Y
N
Check if the voltage of liquid level
switch end is ok
Check if water overflow
Y
Check if the water drainage
works
pump
N
Check if the voltage of water
drainage pump end is ok
N
Replace the main board
of the indoor uint
Y
Check the liquid level
switch
N
Replace the main board of
the indoor uint
Y
Y
Check if the water drainage pipe is
jammed or if water flows smoothly
N
Check the cables of
water drainge pump
Adjust the water
drainage pipe
Y
Clear the water drainage pipe
ƹ Malfunction display: F2 Failure of Evaporator Temp. Sensor
Failure of condenser Temp.
sensor
Y
Check if the plug of the temperature sensor is
correctly connected with socket on the mainboard
N
Check the direction of
the plug and socket
Y
Remove the sensor to check if the resistance
value is ok
N
Replace temperature sensor
Y
Replace mainboard of the
indoor uint
63
MAINTENANCE
ƹ Malfunction display: F3 Failure of Outdoor Ambient Sensor
Failure of outdoor Ambient
sensor
Y
Check if the plug of the temperature sensor is
correctly connected with socket on the mainboard
N
Check the direction of
the plug and socket
Y
N
Replace temperature sensor
Remove the sensor to check if the resistance
value is ok
Y
Replace mainboard of the
indoor uint
ƹ Malfunction display: F5 Failure of Exhaust Temp. Sensor
Failure of Exhaust Temp.
sensor
Y
Check if the plug of the temperature sensor is
correctly connected with socket on the mainboard
N
Check the direction of
the plug and socket
Y
N
Remove the sensor to check if the resistance
value is ok
Y
Replace mainboard of the
indoor uint
64
Replace temperature sensor
MAINTENANCE
3 WIRING DIADRAM
3.1 Outdoor unit
MUL36INV- 4
C
B
A
MUL42INV- 5
E
C
B
A
65
MAINTENANCE
3.2 Indoor unit
3.2.1Duct type
MUL09- DTA, MUL12- DTA, MUL18- DTA; MUL21- DTA; MUL24- DTA
3.2.2 Cassette type
MUL12- FWCA, MUL18- FWCA; MUL24FWCA
66
MAINTENANCE
3.2.3 Floor ceiling type
MUL09- CON, MUL12- CON, MUL18- CON; MUL24- CON
67
MAINTENANCE
4 DISASSEMBLY AND ASSEMBLY PROCEDURE OF MAIN PARTS
4.1 Outdoor Unit
Side Discharge Indoor Unit
Assembly and Disassembly of the Compressor
Remarks: Prior to the assembly of the compressor, make sure there is no refrigerant in the pipeline and the power supply is cut off.
Steps
1.Remove the power
cords away
Illustrations
Operation Instructions
Label the color of the
power cords and the
code of the terminals
Ɣ/RRVHQWKHVFUHZVXVHGWR¿[WKH
power cord with a screw driver.
Ɣ3XOORXWWKHSRZHUFRUG
Note: when removing the power
cord, please label the power
cord and the terminals to avoid
misconnecting next time.
Ɣ/RRVHQWKHVFUHZVRQWKHEDVHRI
the compressor with a wrench.
2.Loosen the screws
XVHGWR¿[WKHEDVH
of the compressor
Tighten the screws on
the base of the new
compressor by a wrench.
3.Separate the compressor
with the connecting pipe
Disconnect the pipeline
connected with the
compressorthrough the
welding gun.
Ɣ%XUQWKHMRLQWRIWKHFRQQHFWLQJ
pipe of the compressor.
Ɣ3XOORXWWKHFRQQHFWLQJSLSH
1RWHQHYHUUOHWWKHÀDPH
contact any other componnet.
Ɣ5HPRYHDQGUHSODFHWKHFRPSUHVVRU
1RWHQHYHUOHWWKHÀDPH
touch any other component
during the replacement.
4.Remove the compressor
away from the seating.
Remove the damaged
compressor out.
Ɣ7LJKWHQWKHVFUHZVRQWKH
seating of the new compressor
5.Fix the new compressor
on the seating.
Tighten the screws on
the base of the new
compressor by a wrench.
68
MAINTENANCE
6.Connect the pipeline with
the suction and discharge
ports of the compressor
Reconnect the pipeline
to the compressor as the
same as the previous status.
Label the color of the
power cords and the
code of the terminals
7. Reconnect the power cord
Ɣ%XUQWKHMRLQWRIWKHFRQQHFWLQJ
pipe and then connect the
pipeline wit the compressor.
1RWHQHYHUOHWWKHÀDPHWRXFK
any other component.
Ɣ7LJKWWKHVFUHZVXVHGWR¿[WKH
power cord with a screwdriver.
Ɣ5HFRQQHFWWKHSRZHUFRUG
Note: reconnect the power
cord in accordance with the
labeled color and terminals.
8.Put the electric
heating belt and the
discharge temperature
sensor etc. in place.
9.Check if the compressor
runs reversely and if
the lubricant leaks.
Assembly and Disassembly of the 4-Way Valve
Steps
1. Take out the coil of
the 4-way valve.
Illustrations
Operation Instructions
/
Ɣ/RRVHQWKHVFUHZVXVHG
WR¿[WKHFRLORIWKHZD\
valve with a screw driver
Pull out the 4-way
valve through the
welding gun
Ɣ%XUQWKHIRXUMRLQWVRIWKHZD\
valve with a welding gun and then
pull out the connecting pipe.
1RWHQHYHUOHWWKHÀDPHWRXFK
any other component.
2. Separate the 4-way valve
away from the connecting pipe.
3. Replace the 4-way valve
and reconnect the 4-way valve
with the connecting pipe.
4. Put the coil of the
4-way valve in place.
Restore the 4-way
value in the previous
status and fix it by
the welding gun.
Ɣ5HSODFHWKHZD\YDOYHDQG
weld the four joints of the 4-way
valve with a welding gun.
1RWHQHYHUOHWWKHÀDPHWRXFK
any other component.
/
Ɣ7LJKWHQWKHVFUHZVXVHG
WR¿[WKHFRLORIWKHZD\
valve with a screwdriver
69
MAINTENANCE
5 EXPLODED VIEWS AND PART LIST
5.1 Outdoor Unit
MUL36INV- 4
77
MAINTENANCE
MUL36INV- 4
78
NO.
Description
1
Front Grill
Code
Qty
01473001
1
2
Cabinet
01433011
1
3
Front Side Plate Sub-Assy
01305247
1
4
Sensor sub-assy
39008072
1
5
Chassis Sub-assy
01194310P
1
6
Insulated board (cover of electric box)
20113003
1
7
Pressure Protect Switch
4602001555
1
8
&RPSUHVVRUDQG¿WWLQJV
00105036
1
9
Connection Pipe
05034405
1
10
Gas-liquid Separator
07220030
1
11
Bidirection Accumulator
07228741
1
12
connecting pipe of "U"shape
05034397
1
13
Right Side Plate Sub-Assy
01314181P
1
14
StrainerA
07210022
1
15
Cut-off Valve
07334403
1
16
Cut-off Valve
07334402
1
17
Strainer
07212121
1
18
Valve support assy
01804398
1
19
Oil Separator
07424118
1
20
4-way Valve
43000411
1
21
Handle
26235253
1
22
4-way Valve Assy
04144307
1
23
Pressure Protect Switch
4602000902
1
24
Inhalation Tube Sub-Assy
04674615
1
25
Condenser Assy
0112418801
1
26
Rear Grill
01475252
1
27
Electric Box Cover
01424271
1
28
Top Cover
01255013P
1
29
Capacitor
33010027
1
30
Electric Box
26905211
1
31
Main Board
30226252
1
32
Radiator
49018029
1
33
Electric Box Sub-Assy
02404128
1
34
Terminal Board
420111041
1
35
Terminal Board
42010270
1
36
Electric Box Assy
02404619
1
37
Motor Support Sub-Assy
01703087
1
38
Condenser support plate
01175401
1
39
Clapboard
0123303901
1
40
Fan Motor
1501350202
1
41
Axial Flow Fan
10335253
1
MAINTENANCE
MUL42INV- 5
79
MAINTENANCE
80
NO.
Description
1
MUL42INV- 5
Code
Qty
Front Grill
22415005
1
2
Cabinet
01435007P
1
3
Front Side Plate Sub-Assy
01305508
1
4
Sensor sub-assy
39008066
1
5
Chassis Sub-assy
01194141P
1
6
Insulated board (cover of electric box)
20113003
1
7
Pressure Protect Switch
4602000902
1
8
Compressor Mounting Plate Sub-Assy
01324238
1
9
&RPSUHVVRUDQG¿WWLQJV
00205230
1
10
Connection Pipe
05034302
1
11
Gas-liquid Separator Sub-Assy
07225018
1
12
Bidirection Accumulator
07228741
1
13
connecting pipe of "U"shape
05034290
1
14
Right Side Plate Sub-Assy
01314304
1
15
StrainerA
07210022
1
16
Cut-off Valve
07334403
1
17
Cut-off Valve
07334402
1
18
StrainerA
07210022
1
19
Valve support assy
01804238
1
20
Oil Separator
07228302
1
21
Tube Clip
0214000521
1
22
StrainerA
07210022
1
23
4-way Valve
43000338
1
24
Handle
26235253
2
25
4-way Valve Assy
04144185
1
26
Pressure Protect Switch
4602001555
1
27
Discharge Tube Sub-Assy
04634310
1
28
Inhalation Tube Sub-Assy
04674230
1
29
Capillary Sub-Assy(Oil Separator)
04104239
1
30
Condenser Assy
01124179
1
31
Rear Grill
01475012
1
32
Electric Box Cover
01424263
1
33
Top Cover
01255009
1
34
Reactor Sub-Assy
02404111
1
35
Cover of Reactor box
01424260
1
36
PFC Inductance
43128003
1
37
Reactor Box
01424258
1
38
Capacitor
33010009
1
39
Electric Box
26905211
1
40
Main Board
30226254
1
41
Radiator
49018112
1
42
Electric Box Sub-Assy
02404112
1
43
Terminal Board
42010270
1
44
Electric Box Assy
02404113
1
45
Motor Support Sub-Assy
01805402
1
46
Left Side Plate
01305064P
1
47
Condenser support plate
01895309
1
48
Clapboard
01244141
1
49
Fan Motor
1570522801
1
50
Axial Flow Fan
10335010
1
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