Servicing Mode - Panasonic WH-ADF0309J3E5CM Service Manual

20. Servicing Mode

20.1.1 Pump Down Operation

Operate the pump down according to the following procedures.
1. Confirm all the 4pcs of 3-way valve on liquid and gas side are open.
2. Connect pressure gauge to gas side of 3-way valve for Duct unit (recommended).
3. Press PUMP DOWN switch (SW1) on the display printed circuit board for more than 5 seconds. Pump down
(cooling) operation is performed for 15 minutes.
4. Set the liquid side 3-way valve for Tank unit to close position followed by liquid side 3-ways valve for Duct
unit and wait until the pressure gauge indicates 0.01 MPa (0.1 kg/cm
5. Immediately set the gas side 3-way valve for Tank unit to close position followed by gas side 3-way valve for
Duct unit and then press the PUMP DOWN switch (SW1) to stop the pump down operation.
Note: Pump down operation will stop automatically after 15 minutes if PUMP DOWN switch (SW1) is not
pressed again.
Pump down operation is not started within 3 minutes after compressor is stopped.
LED 2 3 4 5
○ ○ ○ ○
○ ○ ○
○ ○
○
○
: Flashing
20.1.2 Test Run Operation

Test operation can be carried out using TEST OPERATION button (SW2) on the Service PCB inside the outdoor
unit.

For Cooling test, press the TEST OPERATION button (SW2) for 5 seconds or more but less than 10 seconds,
LED1 and LED 2 will illuminate when shift into cooling test operation.

For Heating test, press the TEST OPERATION button (SW2) for more than 10 seconds, LED 1 and LED 3 will
illuminate when shift into heating test operation.

Press the TEST OPERATION button (SW2) again to cancel test operation.
Fig. 1
SW1 (PUMP DOWN)
SW2 (OPERATION TEST)
OFF ON
OFF ON
JP1
(COOL ONLY)
Message
Pump down operation progress
3 minutes before operation end
2 minutes before operation end
1 minute before operation end
Pump down operation end
2 G).
Gas shut-off valve
Liquid shut-off valve
218
Close
Hexagonal
wrench
Valve lid