Panasonic CU-BZ25XKE Service Manual page 46

12.3.8 Disposal of Outdoor Unit Drain Water

If a drain elbow is used, the unit should be placed on a stand which is taller than 3 cm.

If the unit is used in an area where temperature falls below 0°C for 2 or 3 days in succession, it is recommended
not to use a drain elbow, for the drain water freezes and the fan will not rotate.
12.3.9 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.
12.3.10 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.
12.3.11 Installation of Air Purifying Filter/Dust Collector Filter
1. Open the front panel.
2. Remove the air filters.
3. Put the Air Purifying Filter into place as shown in illustration at below.
Drain elbow 7
Hose
Install the hose at an angle so that the
water smoothly fl ows out.
Drain tray-styrofoam
Discharge air
Air Purifying Filter
Air filter
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