Panasonic WH-ADF0309J3E5CM Service Manual page 173

13.7.3 Cooling only Operation

Setting of Cooling only operation (Duct unit).
The Duct unit can be set to cooling only operation by setting the JP line on the outdoor unit display circuit board.
[Setting method]
Switch off power supply to the outdoor unit, cut JP1 (COOL ONLY) as shown in Figure 1.
After cut off the wire, switch ON the equipment power.
When setting the cooling only operation, Heating operation of Duct unit is disabled.
ODOUR WASH operation is disabled. (Odour cut operation is still enabled.)
To revert back the setting to heat pump operation, switch OFF the equipment power, reconnect JP1 (COOL ONLY)
back to short circuit condition and switch ON the equipment power.
13.7.4 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.
-
The existing refrigerant pipe has been left in an open condition.
-
The diameter and thickness of the existing refrigerant piping does not meet the requirement.
-
The piping length and elevation does not meet the requirement.
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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.
-
The compressor has a failure history.
-
Oil color is darken. ( ASTM 4.0 and above ).
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The existing air-conditioner is gas/oil heat pump type.
-

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.
13.7.5 Check Items
Short circuit of the blow-out air
Smooth flow of the drain
Reliable thermal insulation
Leakage of refrigerant
Fig. 1
SW1 (PUMP DOWN)
SW2 (OPERATION TEST)
OFF ON
OFF ON
JP1
(COOL ONLY)
Mistake in wiring
Reliable connection of the grand wire
Looseness in terminal screw
Grounding/Earth connection
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