Servicing Mode; Pump Down Operation; Heating Only Function - Panasonic PAPAMY1702034CE Service Manual

15. Servicing Mode

15.1 Pump down operation


Operate the pump down process according to the following procedure
Confirm the valve on the liquid side and gas side are open.
o
Short the CN-PUMP button on the Service PCB inside the outdoor unit for more than 5 seconds. Pump down
o
(cooling) operation is performed for 15 minutes.
Set the liquid side 3 way valve to close position and wait until the pressure gauge indicates 0.01MPa
o
2
(0.1kg/cm G).
Immediate set the gas side valve to close position and then Short the CN-PUMP button to stop the pump
o
down operation.
NOTE: Pump down operation will stop automatically after 15 minutes if CN-PUMP button is not shorted again. Pump
down operation is not started within 3 minutes after compressor is stopped.

15.2 Heating only function

The equipment can be set to heating only operation by some setting on the Outdoor unit main circuit board

Switch off power supply to the outdoor unit, unplug and remove the lead wire on CN-HEAT.
Liquid shut-off valve
Gas shut-off valve
Remove the lead wire
CN-HEAT
(HEAT ONLY)
46
close
Hexagonal
wrench
Valve lid
CN-HEAT
(HEAT ONLY)