Panasonic CS-F28DD1E5 / CU-B28DBE8 [41/147] Protection control

Panasonic CS-F50DD1E5 / CU-B50DBE8 [41/147] Protection control
9.7.9. Time Delay Safe Control
The compressor will not start for three minutes after stop of operation.
9.7.10. Outdoor Fan Remaining Heat Removal Control
When compressor stops, outdoor fan operates at High speed for 1 minute to remove the remaining heat.
9.7.11. Crank Case Heater Control
Crank case heater ON when the compressor is shutdown and discharge temperature is 20°C to prevents the refrigerant solving
into compressor oil inside the compressor shell at cold condition.
9.7.12. Pump Down
To enable pump down operation, at outdoor PCB, set the DS1 and DS2 to OFF position.
Press Test Run button for 1 second. SW1 located at outdoor printed circuit board.
During Pump Down operation, push the Test Run button again for 1 second to stop the pump down operation.
The pump down operation runs for 10 minutes.
9.8. Protection control
9.8.1. Outdoor Low-pressure Protection Control
The purpose of low-pressure protection control is gas leakage detection control.
The low-pressure protection control starts when low-pressure switch is activated less than 15 minutes after compressor startup.
During heating operation or deice control low-pressure detection does not start.
During this protection control, compressor is shut down, indoor unit is set to thermo-off status.
After 6 occasions, suction pressure error is displayed; all operations stopped except outdoor fan remaining heat removal
control.
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