9-4. Air conditioner operates, but abnormalities are observed.
9-4-1. Operation does not switch from HEAT to COOL (or COOL to HEAT).
•
Indoor PCB Ass'y is defective.
•
Check voltage between terminals
No. 3(+) and No. 5 at terminal plate.
(DC 24V)
No voltage appears.
Outdoor PCB Ass'y is defective.
OK
•
Remote control unit may be defective.
•
Measure resistance of 4–way valve's
winding.
Receiver in lamp Ass'y may be
defective.
COOL ➞ HEAT
•
Check voltage between terminals
No. 3(+) and No. 5 at terminal plate.
(0V)
HEAT ➞ COOL
To Next Page
Loading...
