Airwell ELECTRA AWAU-VDDE009-H11, Service Manual

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TROUBLESHOOTING
Malfunction
2
x
7
Seg
men
ts
IDU LEDs Possible causes / Actions
System High Pressure
Protection E1 OPER Indicator OFF 3s and blink once
1. Refrigerant was superabundant
2. Poor heat exchange
(including filter blockage of heat
exchanger and bad
radiating environment)
3.Ambient temperature is too high.
Indoor Coil Defrost
Protection E2 OPER Indicator OFF 3S and blink twice
1. Poor air-return in indoor unit
2. Fan speed is abnormal
3. Evaporator is dirty.
System block or
refrigerant leakage E3
OPER Indicator OFF 3S and blink 3 times
1.Low-pressure protection
2.Low-pressure protection of system
3.Low-pressure protection of
compressor
Compressor over Heating
Protection E4
OPER Indicator OFF 3S and blink 4 times
1. EEV connection problem or
damage
2. Refrigerant leakage
3. Poor heat exchange
AC Over Current E5
OPER Indicator OFF 3S and blink 5 times
1. Supply voltage is unstable
2. Supply voltage is too low and
load is too high
3. Evaporator is dirty.
Communication
Malfunction
E6
OPER Indicator OFF 3 Sand blink 6 times 1. Wiring mistakes
2. IDU or ODU PCB problem
Indoor/Outdoor Coil Over
Heating Protection E8
OPER Indicator OFF 3S and blink 8 times
1. Too high ambient temperature
2. Poor heat exchange (including
blockage and bad radiating
environment )
EEPROM problem EE
HEAT Indicator OFF 3Sand blink15
times Outdoor main board damaged
Stop rise/HZ down due to
HST over heating
protection EU
1. Insufficient grease on heatsink or
poor connection of heatsink to PCB
2. Outdoor PCB problem.
Jumper Cap Malfunction C5
OPER Indicator OFF 3S and blink 15 times
1. No jumper cap insert on main
board.
2. Incorrect insert of jumper cap.
3. Jumper cap damaged.
4. Abnormal detecting circuit of
main board.
Gathering refrigerant F0 Normal function
RAT Failure F1 COOL Indicator OFF 3S and blink once
1. Sensor connection is not good
2. Indoor ambient temp. sensor
damaged.(check with sensor
resistance
value chart)
3. Main board damaged.
ICT Failure F2 COOL Indicator OFF 3S and blink twice
OAT Failure F3
COOL Indicator OFF 3Sand blink3 times
OCT Failure F4
COOL Indicator OFF 3Sand blink4 times
CTT Failure F5
COOL Indicator OFF 3S and blink 5
times
HZ down due to overload F6
COOL Indicator OFF 3S and blink for 6 times
1. Too high ambient temperature
2. Poor heat exchange (including
blockage and bad radiating
environment )
Hz down due to over
current F8
COOL Indicator OFF 3S and blink 8 times
1.The input supply voltage is too low
2.System pressure is too
high and overload
Hz down due to CTT over
heating F9
COOL Indicator OFF 3S and blink 9 times
1.Overload or temperature is too
high;
2.Refrigerant is insufficient
3.Malfunction of electric expansion
valve
(EEV)
Stop rise/HZ down due to
IDU defrosting protection FH
1. Poor air-return in indoor unit
2. Fan speed is abnormal
3. Evaporator is dirty.
13-2 SM
JE
DE 1-A.1 GB
13.1.3 Judgment by Indoor/Outdoor Unit Diagnostics
If the malfunction still exists 4min later after stop of unit due to compressor protection, error code will be
directly displayed though indoor display. In other situations, error code can be displayed by pressing
LIGHT button 6 times within 4s.