Quietside QSFMO-D2 - Page 14

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Service Manual
9.2 Flashing LED of Indoor/Outdoor Unit and Primary Judgement
Note: ○: off ●: on Ƽ: blink
When several malfunctions occur at the same time, they will be displayed in circulation and every malfunction is
displayed for 5s.
NO Malfunction description LED1 LED2 LED3 LED4
0 Normal stop ○ ○ ○ ○
1 Compressor run ● ○ ○ ○
2 Compressor overload protection Ƽ ○ ○ ○
3 Discharge protection ○ ● ○ ○
4 Outdoor unit overload protection ● ● ○ ○
5 High pressure protection Ƽ ● ○ ○
6 Over current protection ○ Ƽ ○ ○
7 IMP protection ● Ƽ ○ ○
8 IMP over heating protection Ƽ Ƽ ○ ○
9 PFC protection (including PFC overheating protection) ○ ○ ● ○
10 Phase current protection ● ○ ● ○
11 Over voltage protection Ƽ ○ ● ○
12 Insufficient voltage protection ○ ● ● ○
13 Start failure ● ● ● ○
14 Compressor desynchronizing Ƽ ● ● ○
15 Compressor phase-lacking protection ○ Ƽ ● ○
16 Compressor phase current detection malfunction ● Ƽ ● ○
17 Memory chip mistake Ƽ Ƽ ● ○
18 DC power supply circuit-short ○ ○ Ƽ ○
19 Defrosting ● ○ Ƽ ○
20 Oil return Ƽ ○ Ƽ ○
21 Complete unit frequency restriction protection
○ ●
Ƽ
○
22 Complete unit frequency dropping protection
● ●
Ƽ
○
23 Unit A frequency restriction or frequency dropping protection Ƽ
●
Ƽ
○
24 Unit B frequency restriction or frequency dropping protection ○ Ƽ Ƽ ○
25 Unit C frequency restriction or frequency dropping protection ● Ƽ Ƽ ○
26 Unit D frequency restriction or frequency dropping protection Ƽ Ƽ Ƽ ○
27 Outdoor ambient temperature sensor protection ○ ○ ○ ●
28 Outdoor tube temperature sensor protection ● ○ ○ ●
29 Discharge temperature sensor protection Ƽ ○ ○ ●
30 IPM thermal resistance malfunction ○ ● ○ ●
31 Unit A liquid pipe temperature sensor malfunction ● ● ○ ●
32 Unit A gas pipe temperature sensor malfunction Ƽ ● ○ ●
33 Unit B liquid pipe temperature sensor malfunction ○ Ƽ ○ ●
34 Unit B gas pipe temperature sensor malfunction ● Ƽ ○ ●
35 Unit C liquid pipe temperature sensor malfunction Ƽ Ƽ ○ ●
36 Unit C gas pipe temperature sensor malfunction ○ ○ ● ●
37 Unit D liquid pipe temperature sensor malfunction ● ○ ● ●
38 Unit D gas pipe temperature sensor malfunction Ƽ ○ ● ●
39 Unit A mode conflict ○ ● ● ●
40 Unit B mode conflict ● ● ● ●
41 Unit C mode conflict Ƽ ● ● ●
42 Unit D mode conflict ○ Ƽ ● ●