No
No
*1: FT9 : 208/230 V±10%
FT6 : 460V ±10%
No
No
No
No
No
[H02]
Compressor error (Lock)
MG-CTT: Magnet contactor
1. Outdoor unit power line error
2. Compressor circuit system error
3. Compressor error
4. Refrigerant stagnation in compressor shell
5. A3-IPDU P.C. board error
6. MG-CTT error
Sub-code:
01: Compressor 1,
02: Compressor 2,
03: Compressor 3
Is
power voltage
of outdoor unit
normal? *1
Does
voltage drop occur
when other compressor
starts?
Is
wiring or
connectorconnection on
A3-IPDU P.C. board
normal?
Is MG-CTT normal? *2
Is
there no
refrigerant stagnation
in compressor shell?
Is compressor
normal? *3
Is case heater output
normal?
Correct power line.
Correct connector connection
or wiring.
Exchange MG-CTT
No
Abnormal overload?
Correct cause of overload.
Correct refrigerant stagnation
in compressor shell.
Operation starts.
Check case heater.
Compressor error
Check A3-IPDU P.C. board.
*3 Check the following items mainly.
1. Existence of abnormal sound and abnormal
vibration during operation or starting
2. Abnormal overheat of case during operation or
stop time (Never touch with hands.)
3. Current of compressor lead during operation or
starting time (No sudden change of current?)
*2 Check connection wiring
Check operation of MG-CTT
Check the short circuit of MG-CTT
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
[H03]
Current detective circuit system
error
1. Wiring or connector connection error on
A3-IPDU P.C. board
2. A3-IPDU P.C. board error
Sub-code:
01: Compressor 1,
02: Compressor 2,
03: Compressor 3
Wiring
or connector
connection on IPDU P.C.
boardnormal?
Correct connector connection
or wiring.
Check IPDU P.C. board.
Check code
Cause
Check code name
Check code
Cause
Check code name
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