Ground - Mitsubishi Electric City Multi PUMY-SP112VKM Technical & Service Manual

Check code
1102
(U2)
●Diagnosis of defectives
Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Continued from the previous page
Disconnect the thermistor wiring to check
the resistance.
Is there a resistance detected?
Check the voltage and appearance of the
outdoor multi controller circuit board.
Is the voltage normal value?
Is it free from any trace of over-
heating or burning?
Disconnect the indoor LEV wiring and
check the resistance.
Is there a resistance detected?
OCH668B
Compressor temperature trouble
Diagnosis
Yes
Yes
Yes
No
Replace the outdoor multi controller circuit
No
board.
No
Replace the indoor controller board.
52
Chart 2 of 2
Remedy
Replace the thermistor.
Replace the indoor LEV.