Compressor Reverse Rotation Protection Control - Panasonic CS-ZC15MKY-3 Service Manual

12.5 Compressor Reverse Rotation Protection Control


If the compressor is operating continuously for 5 minutes or longer and the temperature difference between
intake air and indoor heat exchanger is 2.5°C or less for continuous 2 minutes, compressor will stop and restart
automatically.

Time Delay Safety Control is activated before the compressor restart.

This is to prevent compressor from rotate reversely when there is an instantaneous power failure.

If this condition happens continuously for 5 times within 50 minutes, unit will turns off with POWER LED blinks.

The 5 times counter can be reset when either one of the following condition happen:
- Unit is OFF by remote control or AUTO OFF/ON button.
- Indoor intake temperature - indoor piping temperature >5°C for 1 minute or more.

The unit could be ON by pressing OFF/ON button at remote control but the POWER LED will continue blinking.

POWER LED blinking will reset if:
- Indoor intake temperature - indoor piping temperature >5°C for 1 minute or more.
- Power supply reset.
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