5. Trouble Shooting
- 132 -
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54
3-phase wrong wiring
of main outdoor unit
• 3-phase wrong wiring of
outdoor unit (Reverse
Phase /omission of
phase)
• Abnormal Main PCB
• No connection of CN_Phase
• Changed R, S, T connection order
Display
code
Title
Cause of error
Check point & Normal condition
<INVERTER PCB Connection Check>
<Terminal Block&Fuse Check>
<Noise Filter Connection Check>
CN-AC-220V
CN-AC-220V
CN-AC-220V
CN-L1(R)
CN-L1(R)
CN-L2(S)
CN-L2(S)
CN-L3(T)
CN-L3(T)
CN-L1(R)
CN-L2(S)
CN-L3(T)
R S
R S T N G
N G
Fuse
R S
R S T N
N
R S T N
R S
R S T N
N
R S T N
T-N
R S
T
R S T N G
■
Error Diagnosis and Countermeasure Flow Chart
No
R~S/S~T/T~R phase voltage is 380V
°
æ 10%
R~N/S~N/T~N phase voltage is 220V
°
æ10%
Check connection condition and wiring if power is abnormal.
Is PCB connection Normal?
No
1. Check the Connection condition of PCBs
1) Input &Output (R,S,T,N) wire Connection of Noise Filter.
2) Check reverse connecting and non connecting for
CN-L1(R), CN-L2(S), CN-L3(T) of the Inverter PCB
3) Check the CN-AC-220V Connector of the Inverter PCB
and T-N connector of the Noise Filter
2. Check the connection or damage of power source fuses.
Yes
Yes
Recheck power and installation condition
Is input voltage normal ?
Summary of Contents for FM15AH UL3
Page 136: ...P NO MFL36552501 JUNE 2008 ...
