Johnson Controls DHM18CMB21S, Installation And Maintenance Manual

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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 5 s
econds
.
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
● ●
3
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