Acson Air Conditioning Error Codes
00
A1 INDOOR PCB ERROR
A3 DRAIN PUMP ABNORMAL
A5 ANTIFREEZE (COOLING)/HEAT EXCHANGER OVERHEAT (HEATING)
A6 INDOOR FAN MOTOR ABNORMAL
AH ELECTRICAL AIR CLEANER ABNORMAL
C4 INDOOR HEAT EXCHANGER (1) THERMISTOR SHORT/OPEN
C5 INDOOR HEAT EXCHANGER (2) THERMISTOR SHORT/OPEN
C7 LOUVER LIMIT SWITCH ERROR
C9 INDOOR ROOM THERMISTOR SHORT/OPEN
E1 OUTDOOR PCB ERROR
E3 HIGH PRESSURE PROTECTION
E4 LOW PRESSURE PROTECTION
E5 COMPRESSOR MOTOR LOCK/COMPRESSOR OVERLOADED
E6 COMPRESSOR START-UP ERROR
E7 OUTDOOR DC FAN MOTOR LOCK
E8 AC INPUT OVER CURRENT
E9 EXV ERROR
EA 4 WAY VALVE ERROR
F3 DISCHARGE PIPE OVERHEAT
F6 HEAT EXCHANGER OVERHEAT
HO COMPRESSOR SENSOR SYSTEM ERROR
H3 HIGH PRESSURE SWITCH ERROR
H6 COMPRESSOR FEEDBACK DETECTION ERROR
H7 FAN MOTOR OVERLOADED/OVERCURRENT/SENSOR ABNORMAL
H8 AC CURRENT SENSOR ERROR
Error
Code Faulty Indication Error
Code Faulty Indication
E01 Require manual reset (possible causes)
E02 Compressor 1 high temperature (overload)
E03 Compressor 2 high temperature (overload)
E04 Compressor 3 high temperature (overload)
E05 Compressor 4 high temperature (overload)
E06 Compressor 1 high pressure trip / contact open
E07 Compressor 2 high pressure trip / contact open
E08 Compressor 3 high pressure trip / contact open
E09 Compressor 4 high pressure trip / contact open
E10 Compressor 1 trip/low refrigerant/outdoor abnormal
E11 Compressor 2 trip/low refrigerant/outdoor abnormal
E12 Compressor 3 trip/low refrigerant/outdoor abnormal
E13 Compressor 4 trip/low refrigerant/outdoor abnormal
E14 Room sensor short E32 Compressor 1 de-ice
E15 Room sensor open E33 Compressor 2 de-ice
E16 Indoor coil sensor 1 short E34 Compressor 3 de-ice
E17 Indoor coil sensor 2 short E35 Compressor 4 de-ice
E18 Indoor coil sensor 3 short
E19 Indoor coil sensor 4 short
E20 Indoor coil sensor 1 open
E21 Indoor coil sensor 2 open
E22 Indoor coil sensor 3 open
E23 Indoor coil sensor 4 open
E24 Outdoor coil sensor 1 short
E25 Outdoor coil sensor 2 short
E26 Outdoor coil sensor 3 short
E27 Outdoor coil sensor 4 short
E28 Outdoor coil sensor 1 open
E29 Outdoor coil sensor 2 open
E30 Outdoor coil sensor 3 open
E31 Outdoor coil sensor 4 open
E32 Compressor 1 de-ice
E33 Compressor 2 de-ice
E34 Compressor 3 de-ice
E35 Compressor 4 de-ice
Error Diagnosis by Wired Controller (MC301)
ITEM CODE DESCRIPTION
1- E0 System malfunction
2- E1 Sensor Broken (TH1 discharge Temp.)
3- E2 Sensor Broken (TH2 inlet coil 1#)
4- E3 Sensor Broken (TH3 mid coil 1#)
5- E4 Sensor Broken (TH4 inlet coil 2#)
6- E5 Sensor Broken (TH5 mid coil 2#)
7-E6 Sensor Broken (TH6 inlet coil 3#)
8- E7 Sensor Broken (TH7 mid coil 3#)
9- E8 Sensor Broken (TH8 ambient temp)
10- E9 Sensor Broken (TH9 outlet coil)
11- EA Sensor Broken (TH10 subcool outlet)
12- EB Sensor Broken (TH11 subcool suction)
13- EC Sensor Broken (TH12 suction)
14- EF Emergency Run
15- F0 Outdoor Storage Malfunction
16- F1 Sensor Broken (indoor inlet coil)
17- F2 Sensor Broken (indoor mid coil)
Error Diagnosis by Wired Controller (MC301)
ITEM CODE DESCRIPTION
18- F3 Sensor Broken (indoor outlet coil)
19- F4 Sensor Broken (indoor return air)
20- F5 Sensor Broken (indoor supply air)
21- F6 Indoor and controller communication malfunction
22- F7 Ambient temp exceed the limit
23- F8 4WV malfunction
24- F9 Refrigerant leakage
25- FA Controller storage malfunction
26- FB Water Pump (indoor water pump)
27- FC Indoor and outdoor communication malfunction
28- FE Master and slave communication malfunction
29- H0 Digital comp overload
30-H1 Fixed Comp1 overload
31- H2 Fixed Comp2 overload
32- H3 Fixed Comp3 overload
33- H4 High pressure too high
34- H5 Sensor broken, high pressure
35- H6 Discharge temp too high
36- L0 Super heat too low
37- L1 Low pressure too low
38- L2 Sensor broken, low pressure
39- 10 System malfunction
40- 11 Sensor broken (slave TH1 discharge temp)
41- 12 Sensor broken (slave TH2 inlet coil 1#)
42- 13 Sensor Broken (slave TH3 mid coil 1#)
43 -14 Sensor broken (slave TH4 inlet coil 2#)
44- 15 Sensor broken (slave TH5 mid coil 2#)
45-16 Sensor broken (slave TH6 inlet coil 3#)
46- 17 Sensor broken (slave TH7 mid coil 3#)
47- 18 Sensor broken (slave TH8 ambient temp)
48- 19 Sensor broken (slave TH9 outlet coil)
49- 1A Sensor broken (slave TH10 subcool outlet)
50- 1B Sensor broken (slave TH11 subcool suction)
51- 1C Sensor Broken (slave TH12 suction)
52-1F Emergency run (slave)
53- 20 Outdoor storage (slave)
54- 27 Ambient temp exceed the limit (slave)
55- 28 4WV malfunction (slave)
56- 29 Refrigerant leakage (slave)
57 -30 Digital comp overload (slave)
58- 31 Fixed comp1 overload (slave)
59- 32 Fixed comp2 overload (slave)
60- 33 Fixed comp 3 overload (slave)
61- 34 High pressure too high (slave)
62- 35 Sensor broken, high pressure (slave)
63- 36 Discharge temp too high (slave)
64- 40 Super heat too low (slave)
65 -41 Low pressure too low (slave)
66- 42 Sensor broken, low pressure (slave)
