Technibel GRV79R5VAA Technical Data & Service Manual page 66

10-2-3. Only outdoor unit does not run.
A. Check setting temperature.
COOL
Is room temperature too low ?
Try to lower setting temperature by
temperature setting button (
• Try to run using another remote
control unit.
Remote control unit is defective.
B. Check PCB Ass'y in either indoor or outdoor unit.
• Check voltage between terminals
No. 1(+) and No. 2 at the terminal
plate.
• Indoor PCB Ass'y is defective.
10-2-4. Only Indoor unit does not run.
• Indoor PCB Ass'y is defective.
NO
button).
Outdoor unit still does
not run.
OK
OK
(DC 24V)
No voltage appears.
HEAT
Is room temperature too high ?
Try to raise setting temperature by
temperature setting button (
• Try to run using another remote
control unit.
Remote control unit is defective.
• Outdoor PCB Ass'y is defective.
62
NO
button).
Outdoor unit still does
not run.
OK