Compressor Error (Lock) - Toshiba Super MMU-AP0091H Service Manual

Check code name
[H02] / [1d]
(d07 / AI-NET)
Sub-code: 01: Compressor 1 side 02: Compressor 2 side
Is power voltage of
outdoor unit normal? *1
YES
Does voltage drop occur
when other compressor starts?
NO
Does OCR of MG-SW operate?
NO
Is wiring or connector connection
on IPDU P.C. board normal?
YES
Is not it an abnormal overload?
NO
Is there no refrigerant stagnation
in compressor shell?
NO
Operation starts.
Is compressor normal? *2
YES
Check IPDU P.C. board.
Check code name

Compressor error (Lock)

NO
*1 380–415V ± 10%
YES
YES
NO
YES
YES
Is case heater output normal?
Check case heater.
NO
*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.
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
YES
NO
171
Cause of operation
Correct power line.
Reset OCR manually. *3
Correct connector connection
or wiring.
Correct cause of overload.
Correct refrigerant stagnation
in compressor shell.
Compressor error