Aiwa AIWA-09CHSRINV/TP11 User manual

Air Conditioner Service Manual
1
Inverter air conditioner
Service Manual
Models
AIWA-09CHSRINV/TP11
AIWA-12CHSRINV/TP11
AIWA-18CHSRINV/TP11

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CONTENTS
Part ⅠTechnical Information…………………………………...….…………3
1. Important Notice……………………………………………………….………..…………..3
2. Specifications………………………………………………………………..……………....4
2.1 Specifications sheet…………………………………………………….………………………..….……..….….4
2.2 The relation curve of CAPACITY-TEMPERATURE……………………………..……....………...…..………5
2.3 The relation curve of PRESSURE-TEMPERATURE……………………………………....………...…….….5
2.4 The relation curve of NOISE-COMPRESSURE OPERATION FREQUENCY…………....……...…….…..6
3. The Production Dimensions………………………………………………….…..……….7
4. Refrigeration cycle diagram……………………………………………………………….8
5. Electric Diagram……………………………………………………………….…….………9
5.1 Wiring Diagram…………………………………………………………………………………….….……..…..9
5.2 PCB LAOUT……………………………………………………………………………………..........…………12
6. ElectronicController Introduction…………………………………….……….…….…15
6.1 Remote controller…………………………………………….…………………….……………..........……….15
6.2 Electronic controller…………………………………….………………….……………………....…..………..17
6.3 WIFI introduction……………………………………………….……………..…..…..…….…………….……..24
.
PART ⅡInstallation and Maintenance……………..…….……….……….25
1. Notes for installation and maintenance.………………..……………………..……….25
2. Installation…………………………………………………………………………..……….33
2.1 Dimension diagram for Installation……………………………………………………....….…………..……..33
2.2 Inspection of Accessories …………………………………………………………………..………...….……..34
2.3 Position of IDU/ODU……………………………………………………………..…………………..………….35
2.4 Electric Connection………………………………..…………………………….…….……….………….…….35
2.5 The IDU Installation……………………………………..…….………………….…….……………...….…….35
2.6 The ODU Installation………………………………………..….………………….….….……….….…………38
2.7 Vacuum and Gas leakage test………………………………...……….………….……..……….….………..39
2.8 Final Test…………………………………………………………………………………………….….………..39
3. Maintenance………………………………………………………..…………….………….40
3.1 Failure code………………………………………………………………………….…….……….…………….41
3.2 Trouble shooting…………………………………………………….…………….………..……….…..……….42
4. Exploded View………………………………………….…………….…………..…………62
5. Disassembly IDU & ODU ………………………………………………………………….70
APPENDIX
1. The comparison table of CELSIUS-FAHRENHEIT temperature………..…………………..……………..79
2. The Pipe length and Gas charging…………………………………….…….…………………….……….…79
3. Pipe Flaring…………………………………………………………………….………………………..……….80
4. The Thermistor Temperature Characteristics…………………………….…….……………….…....………81

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Part ⅠTechnical Information
1. Important Notice
This service manual is intended for use by individuals possessing adequate
backgrounds of electrical, electronic
and mechanical experience. Any attempt to repair the appliance may result in personal injury and property
damage. The manufacturer or seller cannot be responsible for the interpretation of this information, nor can
it assume any liability in connection with its use.
The information, specifications and parameter are subject tochange due to technical modification or improvement
without any prior notice. The accurate specifications are presented on the nameplate label.

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2. Specifications
2.1 The relation curve of CAPACITY-TEMPERATURE
2.2 The relation curve of PRESSURE-TEMPERATURE
9K
12K
18K
f(Hz)
HP(MPa)
LP(MPa)
f(Hz)
HP(MPa)
LP(MPa)
f(Hz)
HP(MPa)
LP(MPa)
Rated Cooling
49
2.84
0.93
61
2.96
0.92
68
2.90
0.85
Rated Heating
51
2.66
0.74
64
2.72
0.69
68
3.28
0.85
Note:
The test under condition:
Rated Cooling: IDU dry bulb27℃/ Wet bulb 19℃, ODU dry bult35℃/ wet bulb 24℃;The connection pipes: 5m.
Rated Heating: IDU dry bulb20℃/ Wet bulb 15℃, ODU dry bult7℃/ wet bulb 6℃;The connection pipes: 5m.
Important:
The above data under test standard in the lab, the HP (High pressure) and LP (Low pressure) will vary along with the
variation of operation frequency, ambient temperature and\or fan speed.
90.0%
95.0%
100.0%
105.0%
110.0%
2300
2400
2500
2600
2700
35℃48℃
9K
Capacity Rate
0.0%
50.0%
100.0%
150.0%
0
2000
4000
6000
35℃48℃
18K
Capacity Rate
75.0%
80.0%
85.0%
90.0%
95.0%
100.0%
105.0%
2400
2600
2800
3000
3200
3400
35℃48℃
12K
Capacity Rate

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2.3 The relation curve of NOISE-COMPRESSURE OPERATION FREQUENCY
Indoor unit
Outdoor unit
0.0
10.0
20.0
30.0
40.0
50.0
Muter Low speed Mid speed High speed super
speed
9K
Indoor cooling noise Indoor heating noise
0.0
10.0
20.0
30.0
40.0
50.0
Muter Low speed Mid speed High speed super
speed
18K
Indoor cooling noise Indoor heating noise
0.0
10.0
20.0
30.0
40.0
50.0
Muter Low speed Mid speed High speed super
speed
12K
Indoor cooling noise Indoor heating noise
40
45
50
55
60
16Hz 22Hz 28Hz 34Hz 40Hz 46Hz 52Hz 58Hz 64Hz 70Hz 76Hz 82Hz 88Hz 94Hz
100Hz
9K
Outdoor cooling noise Outdoor heating noise
42
44
46
48
50
52
54
16Hz 22Hz 28Hz 34Hz 40Hz 46Hz 52Hz 58Hz 64Hz 70Hz 76Hz 82Hz 88Hz 94Hz
100Hz
12K
Outdoor cooling noise Outdoor heating noise
40
45
50
55
14Hz 20Hz 26Hz 32Hz 38Hz 44Hz 50Hz 56Hz 62Hz 68Hz 74Hz 80Hz 86Hz 92Hz 98Hz
18K
Outdoor cooling noise Outdoor heating noise

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3. Product Dimensions
Indoor Unit:
Outdoor Unit:

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4. Refrigeration cycle diagram
Heat pump
9K,12K
Liquid side
2-way valve
Gas side
3-way valve
Compressor
4-way valve
Muffler
Muffler
Heat exchange
(Condenser)
Heat exchange
(Evaporator)
Check valve
Cooling
Heating
Capillary
18K
Liquid side
2-way valve
Gas side
3-way valve
Compressor
4-way valve
Muffler
Muffler
Heat exchange
(Condenser)
Heat exchange
(Evaporator)
Electronic
expansion valve
Cooling
Heating

5. Electric Diagram
5.1 Wiring diagram
AIWA-09/12/18CHSRINV/TP11

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5.2 PCB LAOUT
Indoor PCB
9K,12K
Bottom view
1
Transformer IN
2
ODU AC power output
3
Transformer OUT
4
Fuse
5
ODU AC power input
6
AC fan motor driving
7
IDU/ODU wiring connection --N
connector
8
Power supply --N connector
9
Anion connector
10 IDU/ODU communication wiring
11 Left-Right swing connector
12 Up-Down swing connector
13
Display
14
Emergency button
15
AC fan motor feedback
16
Temperature sensor connection
17
WIFI connection

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18K
Top view
Bottom view
1ODU AC power output
2
Fuse
3
ODU AC power input
4DC fan motor connection
5
IDU/ODU wiring connection --N
connector
6
Power supply --N connector
7
Anion connector
8IDU/ODU communication wiring
9Left-Right swing connector
10 Up-Down swing connector
11
Display
12
Emergency button
13
Temperature sensor connection
14
WIFI connection

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Outdoor unit
9K, 12K
18K
Note:
OAT: Outdoor Ambient Temperature
OPT: Outdoor pipe temperature
1
ODU PCB Mainly
relay
2
Fuse
3
L, N & 1
(communication)
wiring
4
4-way valve
5
Heater
6
DC fan motor
connector
7
Electronic expansion
valve
8
Discharge sensor
connector
9
OAT/OPT sensor
connector
10
LED5
1
DRED(OPTION)
2
OAT/OPT connector
3
Discharge sensor
connector
4
Electronic expansion
valve
5
AC/DC fan motor
connector
6
Heater
7
4-way valve
8
LED5
9
Communication
wiring
10
Fuse
11
L , N line
12
ODU PCB Mainly
relay
13
LED1-LED4
10
9
8
7
6
5
4
3
2
1
1
2
3
4
5
6
7
8
13
12
9
10
11

6
The display and some functions of the remote control may vary according to the model.
Symbols
Cooling Mode
Dry Mode
Fan only Mode
Heating Mode
Fan speed:
Auto/ low/ low-mid/ mid/ mid-high/ high
TURBO function
Mute function
Up-down auto swing
Temperature indicator
Meaning
Left-right auto swing
SLEEP function
Timer
Battery indicator
Auto Mode
Health function
I FEEL function
ECO Mode
8 heating function
oC
Signal indicator
Gentle wind
Child-Lock
Display ON/OFF
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Anti-Mildew
Self-Clean function
GEN function
6. Electronic Controller Introduction
6.1 Remote controller

7
The shape and position of buttons and indicators may vary according to the model, but their
function is the same.
The display and some functions of the remote control may vary according to the model.
The unit confirms the correct reception of each button with the beep.
No.
Button Function
To select the mode of operation (AUTO, COOL, DRY, FAN, HEAT).
To activate/deactivate the TURBO function.
To decrease temperature, or Timer setting hours.
To increase temperature, or Timer setting hours.
To turn on/off the air conditioner .
To select the fan speed of auto/mute/low/low-mid/mid/mid-high/high/turbo.
8
11
6
7
9
MODE
TURBO
1
2
3
4
FAN
5
To activate/deactivate the ECO function.
ECO
To set the time for timer on/off.
TIMER
To switch-on/off the function SLEEP.
SLEEP
10
To switch-on/off the LED display.
DISPLAY
To stop or start horizontal louver movement or set the desired up/down air flow direction.
12
13
To switch-on/off the I FEEL function.
I FEEL
14
To switch-on/off the MUTE function.
MUTE
Long press to activate/deactivate the GEN function (depending on models).
To stop or start horizontal louver movement or set the desired left/rightair flow direction.
15
16
To activate/deactivate the CHILD-LOCK function.
MODE + TIMER
17
To activate/deactivate the SELF-CLEAN function (depending on models).
18
To activate/deactivate the GENTLE WIND function (depending on models).
FAN + MUTE
19
To activate/deactivate the HEALTH function (depending on models).
HEALTH
CLEAN
Long press to activate/deactivate the 8 heating function (depending on models).
o
C
To activate/deactivate the ANTI-MILDEW function.
ANTI-MILDEW
or
GENTLE WIND

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6.2 Electronic controller
RT-------Room Temperature.
IPT------Indoor Pipe (Coil) Temperature.
ST------Indoor Setting Temperature.
OPT---Outdoor Pipe Temperature.
OAT---Outdoor Ambient Temperature.
ODT---Outdoor Discharge Temperature.
CRT---Compensated Room Temperature.
IDU--- Indoor unit
ODU---Outdoor unit.
Note: When AC finishing installation, because of the air ventilation and the distance of temperature test sensor to
different location of the house, the temperature for IDU PCB control need compensation.
1. Cooling mode. CRT=RT;
2. Heating mode. CRT=RT-3℃-----Split AC.
6.2.1 Auto mode
1. The set temperature can be adjusted from 16-31℃on auto mode, the operation of fan speed and vane position
according to preset.
2. Operation
When unit set to auto mode, it will work on cooling, heating or fan mode totally according to Δt --the temperature
difference between RT and ST shown as table:
Mode
Δt=RT-ST
COOLING
Δt >1℃
FAN
-1℃≤Δt≤1℃
HEATING
Δt <-1℃
6.2.2 Cooling mode
1. Temperature control :16-31℃, and the operation of fan speed and vane position according to preset.
2. Compressor and process control
1). When RT-ST≥0.5℃, the compressor starts up working, AC operates as customer preset;
2). When
a. RT-ST≤－3℃and compressor keeps 2 min continuously; or
b. RT-ST≤－2℃and compressor works in lowest frequency for 5 min continuously; or
c. RT-ST≤－1℃and compressor works in lowest frequency for 10 min continuously,
The compressor stops operation.
3). The compressor frequency control: Based on relation of RT & ST, and the changing speed of RT.
4). The compressor will also stop working while unit:
a. switched off.
b. under protection.
c. changed to fan mode.
5). Under normal operation, the compressor can be stopped by program only working after 7 min once it starts up.
6). In the process of unit operation, once the compressor ceased, it should be 3 min delay for the next procedure.
3. ODU Fan motor control:
1). While unit:
a. switched off.
b. under protection.
c. to the set temperature.

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After compressor ceased, the fan motor stops working according to the temperature of OPT and OAT, the max
delay for the motor should be less than 160s.
2). When switch on unit on cooling mode, ODU fan motor will delay 5s after compressor starts up.
4. When ODU failure or stops for protection, IDU works as preset.
5. Anti-frosting protection
Control the unit operation frequency and the frequency changing rate to achieve anti-frosting protection.
1). Frequency Slowly Increasing(FSI):
a. If 6℃≤IPT＜7℃, the frequency increasing rate is 1Hz/60s, slowly increasing operation speed.
b. When IPT≥7℃, unit quit from protection.
2). Frequency Limitation:
If 5℃≤IPT＜6℃, the compressor frequency forbidden to increase
3). Normal Frequency Decreasing (NFD):
If 3℃≤IPT＜4℃, the frequency decreasing rate is 8Hz/90s, until to the lower frequency limit.
4). Fast Frequency Decreasing (FFD):
If 2℃≤IPT＜3℃, the frequency decreasing rate is 16Hz/90s, until to the lower frequency limit.
5). Unit stop:
a. When IPT＜1℃for 3min continuously, unit stops working for anti-defrosting protection.
b. While IPT＞6℃, and the unit stopped for 3 min already, can the unit recover to operation.
0℃
-1℃
-2℃
-3℃
RT-ST
COMPRESSOR
OUTDOOR FAN
INDOOR FAN
160S
160S
10min.
5min. 2min.
ON OFF
5s
0.5℃
≥ 7min.
≥3min.
6.2.3 Dry mode
1. Temperature control: 16~31℃.
Fan speed: low
Vane blade position: as customer preset
2. When ODU failure or stops for protection, IDU works as preset.
3. Failure protection: as cooling mode.
4. Energy saving and sleep mode: Invalid.
6.2.4 Heating mode
1. Temperature control: 16-31℃.
2. Compressor and process control.
1). When ST-CRT≥0.5℃, the compressor starts up working, AC operates as customer preset;;
2). When
a. ST-CRT≤－3℃and compressor keeps 2 min continuously; or
b. ST-CRT≤－2℃and compressor works in lowest frequency for 5 min continuously; or
c. RT-CRT≤－1℃and compressor works in lowest frequency for 10 min continuously,
The compressor stops operation.

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3). The compressor frequency control: Based on relation of RT & ST, and the changing speed of RT.
4). The compressor will also stop working while unit:
a. switched off.
b. under protection.
c. changed to fan mode.
5). Under normal operation, the compressor can be stopped by program only working after 7 min once it starts up.
6). In the process of unit operation, once the compressor ceased, it should be 3 min delay for the next procedure.
3. IDU time delay: When compressor stops or unit switches off while in heating mode, IDU fan motor will work for a
few seconds more to prevent overheat.
4: ODU Fan motor control:
1). While unit:
a. To be switched off
b. Under protection.
c. To the set temperature
After compressor ceased, the fan motor stops working according to the temperature of OPT and OAT, the max
delay for the motor should be less than 160s.
2). When switch on unit on heating mode, ODU fan motor will delay 5s after compressor starts up
3). in the process of defrosting, the fan motor will stop operation 48s delay after compressor stopped.
4). defrosting finish, the compressor stops operation, the fan motor will start working simultaneously.
5. 4-way valve control
1). On Cooling/Dry/Fan mode,4-way valve: OFF, when unit switched on heating mode,4-way valve: ON.
2). When heating mode switched off, or changed from heating to other modes, the 4-way valve will be OFF 2 min
delay after the compressor stops working.
3). Unit stops working caused by any kind of protection, the 4-way valve will be OFF 4 min delay.
4). In the process of defrosting, 4-way valve will be OFF 43s delay after compressor stopped.
5). When defrosting finish, the compressor stops operation, 4-way valve will be ON after 43s delay.
0 ℃
-1℃
-2℃
-3℃
ST-CRT
COMPRESSOR
OUTDOOR FAN
INDOOR FAN
2 min.
10 min.
5min.
≥ 7min.
160S
160S
≥3min.
4-way VALVE
5s
ON OFF
0.5℃
≤2min. ≤2min.

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6. Defrost
Note: t1: compressor continuous works time.
t2: AC unit operation first time going to defrost circle.
t3: compressor accumulated working time (when OPT≤3℃unit starts to count the time for t3).
When AC unit working to:
a. t1≥t2, or
b. t3≤t1＜t2.
and also the temperature (related to OAT & OPT) tested 3 min continuously meets for defrosting.
1) Defrosting start up: Compressor stops working, and re-starts to working after 50s delay;
2) Conditions for quitting defrosting
a. After defrosting 60s, and OAT≥12℃; or
b. OAT＜－5℃, and OPT ≥8℃for 80s continuously; or
c. The defrosting for 10 min.
WhenAC meet any of condition a, b or c, defrosting finish.
COMPRESSOR
ON
OUTDOOR FAN
4-way VALVE
OFF
50S 50S
43S
48S Defrosting max time
43s
3) Defrosting end off: Compressor stops working, and re-starts to working after 50s delay;
7. Cold air prevention:
This function intends to prevent cold air from being discharged when the heating operation starts up
1). IDU fan motor cold air prevention
①.When RT＜24℃:
a. If ITP＞31℃while compressor works for 5 min, fan motor will work according to preset fan speed.
b. If IPT≤31℃, fan motor stops working while compressor operation within 2min, if IPT≥27℃, fan motor works
in low speed 2 min, then change to preset speed.
②When RT≥24℃:
a. Within 2 min after compressor start up working, once IPT＞27℃, fan motor will change to preset speed.
b. After compressor starts working 2 min, fan motor change to preset speed directly.
2). Vane blade operation for cold air prevention.
a. If the vane works on status of non-swing: While IPT increase to a special degree, the vane blade will change
the position to:
①Default angle; or
②Previous position; or
③Customer preset.
The above operation can work one time only, when compressor stops working, the unit will once again inspect
the function.
b. If the vane works on swing: When IDU quits from cold air prevention, vane operate as preset.
8. “8℃” Heating
When function effective, it will make sure the room temperature not lower than 8℃, unit works on heating mode.

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6.2.5 Fan mode
1. The temperature setting: 16~31℃,
Fan speed and vane position: as preset. The function for remote controller 58E only.
2. For above function, when unit preset to be auto fan mode, the fan motor will change its operation speed based
on the temperature difference of ambient and preset temperature.
3. ODU always OFF.
6.2.6 Timer
The unit has times control, when the unit meet the timer preset, it will be switched on or off automatically.
1. TIMER ON
1). TIMER ON can be set only when the air conditioner is OFF.
2). Press TIMER on the remote control ONCE to enter time setting.
3). Press “▲” or “▼” to set the time for unit to start working.
4). Set other function as MODE, FAN SPEED, SWING etc.
5). Press TIMER ONCE AGAIN to confirm the TIME ON setting
2. TIMER OFF
1). TIMER OFF can be set only when the air conditioner is ON.
2). Press TIMER on the remote control ONCE to enter time setting.
3). Press “▲” or “▼” to set the time for unit to stop working.
4). Press TIMER ONCE AGAIN to confirm the TIME OFF setting
Note: In case of no selection for the time setting within 10s, the timer function will be OFF automatically.
6.2.7 Sleeping mode
WhileAC works in sleeping mode, the light of POWER SUPPLY and SLEEP always ON, and the temperature
display will be OFF after 15s.
In this mode, the AC unit works according to the SLEEP CURVE as designed.
Sleeping mode the unit can work 10 hours continuously, after that it will quit from this mode and work as previous
presetting.
6.2.8 Emergency switch
When the EMERGENCY switch is pressed one time, COOLING mode is selected and if it pressed again within 3s,
HEATING mode selected, while press once again, the unit will be switched off.
When the remote controller out of function, batteries lost power, for example, the EMERGENCY button in the
front of indoor unit can be used for function test.
NOTE: Do not press the EMERGEMCY switch during normal operation.
6.2.9 Auto-restart function
While air conditioner is operating in one mode, all of its operation data, such as working mode, preset temperature
etc. would be memorized into IC by main PCB. If power supply cut off due to reasons and recover again, the AUTO-
RESTART function will set synchronously and the air conditioner would work at the same mode as before.
℃
4
2
0
δt comes down
δt goes up
High fan
Mid fan
Low fan
2℃
4℃

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Note: The function setting:
Within 3 min while power on unit, set the unit on cooling mode, set temperature 30℃, and mid fan speed, press the
ECO button 10 times within 8s, the AUTO-RESTART will be activated.
6.2.10 Protection
6.2.10.1 Overload protection
1. Overload protection for Cooling or Dry mode
1). if:
a. OPT≥62℃, unit stops working for overload protection.
b. OPT＜55℃, after compressor stopped for 3 min, can the unit be started to operate.
2). When OPT≥55℃, the compressor will be frequency limited/reduced for over load protection.
3). If unit have 6 times of over load stop-working protection continuously, this protection can’t be recovered unless
press ON/OFF button, and unit will show failure code.
In the process of operation, once the compressor runs continuously more than 6 min, the counter of over load
stop-working protection will be reset to zero and start a new counting process.
The failure and times for protection will eliminate immediately once the unit to be switched off, on fan mode or
changed to be heating mode from others.
Note: If the defective failure can’t be recovered, the failure can’t eliminate even if operation mode changed.
2. Overload protection for Heating mode
1). If:
a. IPT≥62℃, unit stops working for overload protection.
b. IPT＜55℃, after compressor stopped for 3 min, can the unit be started to operate.
2). When IPT≥55℃, the compressor will be frequency limited/reduced for over load protection.
3). If unit have 6 times of over load stop-working protection continuously, this protection can’t be recovered unless
press ON/OFF button, and unit will show failure code.
In the process of operation, once the compressor runs continuously more than 6 min, the counter of over load
stop-working protection will be reset to zero and start a new counting process.
The failure and times for protection will eliminate immediately once the unit to be switched off, on fan mode or
changed to be heating mode from others.
Note: If the defective failure can’t be recovered, the failure can’t eliminate even if operation mode changed.
6.2.10.2 The compressor discharge temperature protection
1. If ODT≥115℃, unit stops working for over temperature protection;
While ODT＜100℃, & after compressor stopped for 3 min, the unit can be started to operate.
2. If ODT≥100℃, the compressor will be frequency limited/reduced for over temperature protection.
3. If unit have 6 times of discharge over temperature stop working protection continuously, this protection can’t
be recovered unless press ON/OFF button, and unit will show failure code.
In the process of operation, once the compressor runs continuously more than 6 min, the counter of discharge
over temperature stop working protection will be reset to zero and start a new counting process.
The failure and times for protection will eliminate immediately once the unit to be switched off, or changed to fan
mode.
Note: If the defective failure can’t be recovered, the failure can’t eliminate even if operation mode changed.
6.2.10.3 The current protection
1. If the unit A/C working current more than Limited current (ILC), the compressor will be frequency limited /
reduced for over current protection.
2. When unit A/C working current more than Stopped current (ISC), AC unit stops working. Only when the
compressor stops for 3 min can the unit be recovered operation.
3. If unit have 6 times of over current stop-working protection continuously, this protection can’t be recovered

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unless press ON/OFF button.
In the process of unit operation, once the compressor runs continuously more than 6 min, the counter of stop-
working protection will be reset to zero and re-start a new counting process.
Note: For different models, ILC and ISC have different programmed value.
6.2.10.4 IPM overheating protection
1. When IPM temperature TIPM≥87℃, the compressor will be frequency limited / reduced for IPM over temperature
protection.
2. When TIPM≥95℃, the AC unit stops working for AC system protection.
If TIPM＜87℃,and after compressor stopped for 3 min, can the unit be started to operate.
3. If unit have 6 times of IPM over temperature stop working protection continuously, this protection can’t be
recovered unless press ON/OFF button, and unit will show failure code.
In the process of operation, once the compressor runs continuously more than 6 min, the counter of over load
stop working protection will be reset to zero and re-start a new counting process.
The failure and times for protection will eliminate immediately once the unit to be switched off, or changed to fan
mode.
Note: If the defective failure can’t be recovered, the failure can’t eliminate even if operation mode changed.
6.2.11 Complementary
6.2.11.1 Energy saving (ECO)
Function effective on Cooling and Heating mode only.
On cooling mode, the set temperature range from 26℃to 31℃,on heating mode, from 16℃to 25℃.
6.2.11.2 TURBO
Function effective on Cooling, Heating, Fan and Auto modes, and fan speed operates on highest.
6.2.11.3 The communication control
If ODU PCB can’t get signal feedback from IDU for 2 min continuously, AC unit stops working and shows E0 error
code as IDU/ODU communication failure.
Once the IDU & ODU communication recovery, and also the compressor stopped for 3 min already, can the unit be
recovered to operate.