Panasonic CS-XZ20XKEW-H Service Manual page 50

12.2.9 How to Replace Network Adapter

Remove the front grille (refer how to take out front grille) from the unit.

Remove the indicator piece by releasing the hook.

Remove 1 mounting screw, then remove the network adaptor holder.

After that, network adaptor can be easily replaced.
2
12.2.10 Check the Drainage

Open front panel and remove air filters.
(Drainage checking can be carried out without
removing the front grille.)

Pour a glass of water into the drain tray-styrofoam.

Ensure that water flows out from drain hose of the
indoor unit.
12.2.11 Evaluation of the Performance

Operate the unit at cooling/heating operation
mode for fifteen minutes or more.

Measure the temperature of the intake and
discharge air.

Ensure the difference between the intake
temperature and the discharge is more than 8°C
during Cooling operation or more than 14°C
during Heating operation.
Note:

During extremely cold winter, turn on the power
supply and standby the unit for at least 15 minutes
before test run. Allow sufficient time to warm up
refrigerant and prevent wrong error code
judgement.
3
Indicator
piece
Hook
Screw
50
4
Network adaptor
holder
Drain tray-styrofoam
Discharge air