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Servicing
TURN OFF all the power switches.
(6) Connect a charging hose to (J) brazing part of oil separator outlet port. Then, charge nitrogen (22psi (0.15MPa)) from (E)
Low Pressure Check Joint, and collect refrigerant oil in (H) Oil Separator.
NOTE:
In the case that the unit has two (2) return oil circuits and two (2) oil separators, collect the refrigerant oil at the same
time.
(7) CStop charging nitrogen after the refrigerant oil has completely been collected, then remove the tape added in step (5)
and re-solder a new (G) return oil circuit to the system.
Perform vacuuming from (E) low pressure check joint and add the same quantity of oil as the collected refrigerant oil
from (D) check joint for collecting refrigerant oil.
NOTE:
1. In the case of replacing the return oil circuit only, the procedures (6) and (7) are not required.
2. In the case that the unit has two (2) return oil circuits, two new (G) return oil circuits are needed.
3. When re-solder (G) return oil circuit to the system, make sure the solder joint is fully inserted.
(8) pressurization from (D) low pressure check joint. During the work, check that the oil does not spill out from the are nut
connection and brazing part.
(9) When the procedures have been completed, perform vacuuming again from (E) low pressure check joint and recharge
the refrigerant. After recharging, open the stop valves.
NOTE:
1. Use a clean charging hose.
2. Charge the refrigerant oil in a short time (within approx. 20 minutes).
Use a container with a small opening so that the refrigerant oil will not absorb the moisture in the atmosphere.
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