Panasonic U-4LE2E5 Service Manual & Test Run Service Manual page 80

6. Charging Compressor Oil 7. Charging Compressor Oil
6-2. If Outdoor Unit Has Not Been Charged with Refrigerant
When a compressor has been replaced or in any other case where the outdoor unit has not been charged with
refrigerant, first charge with refrigerant then follow the instructions in "6-1. If Refrigerant Has Already Been Charged
to Outdoor Unit" and charge with oil.
Or, alternatively, follow the procedure below.
(1) Connect a tube to the oil outlet port on the outdoor unit to be charged with oil. Insert the other end of the tube into
the oil container.
(2) Follow the instructions in "5. Evacuating System," and apply vacuum to the outdoor unit to be charged with oil.
When this is done, oil is charged into the outdoor unit through the oil outlet port.
(3) When the unit has been charged with the designated amount of oil, stop the vacuum pump.
CAUTION
3
Vacuum pump
Oil
6-3. Charging Additional Compressor Oil (after replacing compressor)
The rated amount of compressors as given below:
Model name
U-*LE2E5
U-*LE2E8
When replacing a faulty compressor, be sure to first measure the weight of the compressor.
If the surplus oil is removed along with the compressor, add the same amount of new oil.
For example:
Additional oil to be charged: 22.3 kg (removed compressor weight) – 22.1 kg (new compressor weight) = 0.2 kg ≒ 0.2 L
* If the result is a negative weight (removed compressor weight is less than the rated weight), it is not necessary
to discharge the extra oil from the system.
The oil absorbs moisture readily. This work must be completed quickly.
Manifold gauge
Lo Hi
Compressor model
5VD420XEB21
5VD420XFA21
Fig. 9
Q'ty Weight (OIL IN) [kg]
1 22.1
1 22.1
3 - 14
2WAY SYSTEM
Mini VRF SYSTEM
Outdoor Unit Repair Procedures
Outdoor Unit Repair Procedures
Low-pressure outlet port
(for ø7.94mm-dia connector)
High-pressure outlet port
(for ø7.94mm-dia connector)
Gas tube service port
(for ø7.94mm-dia connector)
Liquid tube service port
(for ø7.94mm-dia connector)