Mitsubishi Electric PUMY-P36NKMU3 Technical & Service Manual page 52

Check code
1102
(U2)
●Diagnosis of defects
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 the resistance detected?
Check the voltage and appearance of the
outdoor controller 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 the resistance detected?
OCH733
Compressor temperature trouble
Diagnosis
Yes
Yes
Yes
No
Replace the outdoor controller board.
No
No
Replace the indoor controller board.
52
Chart 2 of 2
Remedy
Replace the thermistor.
Replace the indoor LEV.