Mitsubishi PUMY-P60NKMU Technical & Service Manual page 44

Check code
Superheat due to low discharge temperature trouble
1500
●Diagnosis of defectives
Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Continued from the previous page
Is there a resistance detected?
Check the voltage and appearance of the
indoor controller board.
Is the voltage normal ?
Is it free from any trace of over-
heating or burning?
Check the 63HS voltage.
Is there a voltage detected?
OCH502C
Diagnosis
No
Yes
No
Yes
No
Yes
Replace the indoor LEV.
Replace the indoor controller board.
Replace the outdoor controller board.
44
Chart 2 of 2
Remedy
Replace the 63HS.