1500
(U7)
Superheat due to low discharge temperature trouble
●Diagnosis of defectives
Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Diagnosis Remedy
Chart 2 of 2
Is there a resistance detected?
Replace the indoor LEV.
No
No
Yes
Yes
No
Yes
Continued from the previous page
Is the voltage normal?
Is it free from any trace of over-
heating or burning?
Is there a voltage(*) detected?
Replace the indoor controller board.
Replace the 63HS.
Replace the outdoor controller board.
Check the voltage and appearance of the
indoor controller board.
Check the 63HS voltage.
*For the voltage, refer to "8-7.HOW TO
CHECK THE COMPONENTS".
66
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