Technical data

5-4. Air conditioner operates, but abnormalities are observed

5-4-1. Operation does not switch from HEAT to COOL (or COOL to HEAT)

Remote control unit Receiver in lamp ass'y

may be defective may be defective

Measure resistance of

4-way valve's winding

COOL to HEAT

Check voltage between Outdoor PCB ass'y is defective

terminals N and 6 (230V AC)

Indoor PCB ass'y is defective

HEAT to COOL

Check voltage between

terminals N and 6 (230V AC)

No voltage appears