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

Check code
Superheat due to low discharge temperature trouble
1500
(U7)
●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?
OCH668B
Diagnosis
Yes
Yes
*For the voltage, refer to "8-6. HOW
TO CHECK THE COMPONENTS".
Yes
No
Replace the indoor controller board.
No
No
Replace the outdoor multi controller circuit
board.
58
Chart 2 of 2
Remedy
Replace the indoor LEV.
Replace the 63HS.