Air Conditioner Operates, But Abnormalities Are Observed - Sanyo SAP- FR99EH Technical Data & Service Manual

6-4. Air conditioner operates, but abnormalities are observed.

6-4-1. Operation does not switch from HEAT to COOL (or COOL to HEAT).
• Remote control unit may be defective.
• Measure resistance of 4–way valve's
winding.
COOL ➞ HEAT
• Check voltage between terminals
No. 1(+) and No. 4 at the terminal
plate.
• Indoor PCB Ass'y is defective.
HEAT ➞ COOL
• Check voltage between terminals
No. 1(+) and No. 4 at the terminal
plate.
(AC 220–240V)
No voltage appears.
(0V)
Receiver in lamp Ass'y may be
defective.
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