MAXA BD2M53A3, Technical Manual

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8.3 Malfunction Display of Outdoor Units
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 ◙ ○ ○ ○
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 ○ ◙ ● ●
43 Communication failure with Unit A ● ◙ ● ●
44 Communication failure with Unit B ◙ ◙ ●
●
45 Communication failure with Unit C ○ ○ ◙ ●
46 Communication failure with Unit D ● ○ ◙ ●
47 Unit A freeze protection ◙ ○ ◙ ●
48 Unit B freeze protection ○ ● ◙ ●
49 Unit C freeze protection ● ● ◙ ●
50 Unit D freeze protection ◙ ● ◙ ●
51 Unit A overheating prevention protection ○ ◙ ◙ ●
52 Unit B overheating prevention protection ● ◙ ◙ ●
53 Unit C overheating prevention protection ◙ ◙ ◙ ●
54 Unit D overheating prevention protection ○ ○ ○ ◙
55 Unit A communication wire misconnection or expansion valve malfunction ● ○ ○ ◙
56 Unit B communication wire misconnection or expansion valve malfunction ◙ ○ ○ ◙
57 Unit C communication wire misconnection or expansion valve malfunction ○ ● ○ ◙
58 Unit D communication wire misconnection or expansion valve malfunction ● ● ○ ◙
Note: ○ : off, ● : on,
◙
: blink