Panasonic CS-HZ25WKE Service Manual page 42

12.3.9 Outdoor Unit Drain Water

Water will drip from the basepan hole area during
defrost function.

To avoid water dripping, do not stand or place
objects at this area.
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.
12.3.11 How to Replace Network Adapter

Remove the front grille (refer how to take out front grille) from the unit.

Remove the network adapter box by releasing the hook (Figure 1.0).

Remove the cover by unclipping it and pulling it out (Figure 1.1)

Remove the top casing by pressing the side of the network adapter box. (Figure 1.2)

After that, network adapter can be easily replaced (Figure 1.3).
Hook
Figure 1.0
12.3.12 In Case of Reusing Existing Refrigerant Piping
Observe the followings to decide reusing the existing refrigerant piping.
-
Poor refrigerant piping could result in product failure.

In the circumstances listed below, do not reuse any refrigerant piping. Instead, make sure to install a new
piping.
Heat insulation is not provided for either liquid-side or gas-side piping or both.
o
The existing refrigerant pipe has been left in an open condition.
o
The diameter and thickness of the existing refrigerant piping does not meet the requirement.
o
The piping length and elevation does not meet the requirement.
o

Perform proper pump down before reuse piping.

In the circumstances listed below, clean it thoroughly before reuse.
Pump down operation cannot be performed for the existing air-conditioner.
o
The compressor has a failure history.
o
Oil color is darken. ( ASTM 4.0 and above ).
o
The existing air-conditioner is gas/oil heat pump type.
o

Do not reuse the flare to prevent gas leak. Make sure to install a new flare.

If there is a welded part on the existing refrigerant piping, conduct a gas leak check on the welded part.

Replace deteriorated heat insulating material with a new one.
Heat insulating material is required for both liquid-side and gas-side piping.
Figure 1.1
Unclip & pull down
42
Discharge air
Press
Press
Figure 1.2
Hose
Figure 1.3