Troubleshooting; Malfunction Indicator - Gree GWHD14NK3BO Service Manual

9. Troubleshooting

9.1 Malfunction Indicator

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When several malfunctions occur at the same time, they will be displayed in circulation and every malfunction is
displayed for 5s.
NO Malfunction description
0 Normal stop
1 Compressor run
2 Compressor overload protection
3 Discharge protection
4 Outdoor unit overload protection
5 High pressure protection
6 Over current protection
7 IMP protection
8 IMP over heating protection
9 PFC protection (including PFC overheating protection)
10 Phase current protection
11 Over voltage protection
12 Insufficient voltage protection
13 Start failure
14 Compressor desynchronizing
15 Compressor phase-lacking protection
16 Compressor phase current detection malfunction
17 Memory chip mistake
18 DC power supply circuit-short
19 Defrosting
20 Oil return
21 Complete unit frequency restriction protection
22 Complete unit frequency dropping protection
23 Unit A frequency restriction or frequency dropping protection
24 Unit B frequency restriction or frequency dropping protection
25 Unit C frequency restriction or frequency dropping protection
26 Unit D frequency restriction or frequency dropping protection
27 Outdoor ambient temperature sensor protection
28 Outdoor tube temperature sensor protection
29 Discharge temperature sensor protection
30 IPM thermal resistance malfunction
31 Unit A liquid pipe temperature sensor malfunction
32 Unit A gas pipe temperature sensor malfunction
33 Unit B liquid pipe temperature sensor malfunction
34 Unit B gas pipe temperature sensor malfunction
35 Unit C liquid pipe temperature sensor malfunction
36 Unit C gas pipe temperature sensor malfunction
37 Unit D liquid pipe temperature sensor malfunction
38 Unit D gas pipe temperature sensor malfunction
39 Unit A mode conflict
40 Unit B mode conflict
41 Unit C mode conflict
42 Unit D mode conflict
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Troubleshooting
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