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2) Air purging
The air which contains remaining moisture in the refrigeration
cycle may cause a malfunction on the compressor.
1. To purge the air, push the pin on the gas side 3-way valve
for three seconds using with a hexagonal wrench and set
it free for one minute.
• Repeat this three times.
2. To balance the refrigerant, close the low pressure side
valve on the manifold gauge and release a refrigerant
from the piping through service port until the gauge
indicates 0.49 ~ 0.294 MPa.
3. Set the both 3-way valves to open position with the
hexagonal wrench for the unit operation.
11.3.4. Connect The Cable To The Outdoor
Unit
1. Remove the control board cover from the unit by
loosening the screw.
2. Connecting cable between indoor unit and outdoor unit
shall be approved polychloroprene sheathed 4 × 1.5 mm
2
flexible cord, type designation 245 IEC 57 or heavier
cord.
Power supply cord cable use 3 x 1.5 mm2 flexible cord,
type designation 245 IEC 57 or heavier cord.
3. Secure the cable onto the control board with the holder
(clamper).
4. Confirm the SW1 Switch at AUTO position.
(CU-3C20GKH)
5. Attach the control board cover back to the original
position with the screw.
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