Toshiba MMU-P0121H Service Manual page 66

Check code
[1F]
Compressor break down
Is power supply voltage
of outdoor unit normal?
YES
Does voltage reduction occur
when fixed-speed compressor
has been activated?
NO
Is connection of wiring
connector on IPDU
P.C. board normal?
YES
Is there an abnormal overload?
NO
Check IPDU P.C. board.
1. Outdoor unit power supply error
2. Inverter compressor circuit system error
3. IPDU P.C. board error
NO
YES
NO
YES
3-63
Operation cause
Modify power supply line.
Modify connector of wiring.
Modify cause of overload.