77
Check code name
[H02] / [1d]
(Current code / AI-NET)
Check code name
Compressor error (Lock)
Cause of operation
1. Outdoor unit power line error
2. Compressor circuit system error
3. Compressor error
4. Refrigerant stagnation in compressor shell
5. IPDU P.C. board error
Sub-code: 01: Compressor 1 side 02: Compressor 2 side
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
Operation starts.
Is compressor normal? *2
Check IPDU P.C. board.
Is not it an abnormal overload?
Is case heater output normal?
Is power voltage of
outdoor unit normal? *1
Does voltage drop occur
when other compressor starts?
Is wiring or connector connection
on IPDU P.C. board normal?
Is there no refrigerant stagnation
in compressor shell?
Correct power line.
Correct cause of overload.
Compressor error
Correct connector connection
or wiring.
Correct refrigerant stagnation
in compressor shell.
*1 380–415V ± 10%
*2 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 varied change of current) change
*3 If OCR operates even after manual reset of OCR, check whether the wiring to the
current sensor (TO2) of Comp-IPDU is correct or not.
Check case heater.
YES
NO
Does OCR of MG-SW operate?
Reset OCR manually. *3
FILE NO. SVM-05052
Summary of Contents for MMK-AP0072H
Page 125: ...TOSHIBA CARRIER CORPORATION ...
