Technibel GR451R, Технические данные и руководство по обслуживанию

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8 -4. Air conditioner operates, but abnormalities are observed.
8 -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. 4(+) and No. 6 at terminal plate.
No voltage appears.
Outdoor PCB Ass'y is defective.
OK
• Remote control unit may be defective.
• Measure resistance of 4–way valve's
winding. (20S)
Receiver in lamp Ass'y may be
defective.
Cool
➞
Heat
• Check voltage between terminals
No. 4(+) and No. 6 at terminal plate.
(0V)
HEAT ➞ COOL
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