1501
(U2)
Refrigerant shortage 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
*For the voltage, refer to
"8-7.HOW TO CHECK THE
COMPONENTS".
No
No
No
Yes
Yes
Yes
Yes
Yes
No
Continued from the previous page
Is there a voltage(*) detected?
Is the voltage normal value?
Is it free from any trace of over-
heating or burning?
Is there a resistance detected?
Replace the outdoor controller board.
Replace the 63HS.
Replace the indoor LEV.
Replace the indoor controller board.
Check the 63HS voltage.
Check the voltage and appearance of the
outdoor controller board.
Disconnect the indoor LEV wiring and
check the resistance.
Is there a resistance detected? Replace the thermistor.
68
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