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11.3.4
Air Purging of the Piping and Indoor
The remaining air in the Refrigeration cycle which
contains moisture may cause malfunction on the
compressor.
1
Remove the caps from the 2-way and 3-way
valves.
2
Remove the service-port cap from the 3-way
valves.
3
To open the valve, turn the valve stem of
2-way valve counter-clockwise approx. 90°
and hold it there for ten seconds, then close it.
4
Check gas-leakage of the connecting portion
of the pipings.
For the left pipings, refer to item 4(A).
o
No leakage found
5. To open 2-way valve
again, turn the valve
stem counter-clockwise
until it stop.
6. To purge the air, push
the pin on the service
port of 3-way valve for
three second using with
a hexagonal wrench and set it free for one minute.
Repeat this three times.
7. Set the both 2-way and 3-way valves to open position
with the Hexagonal wrench for the unit operation.
11.3.5
Connect the Cable to the Outdoor Unit
1
Remove the control board cover from the unit by loosening the screw.
2
Connection cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed
2
3 x 1.5 mm
flexible cord, type designation 60245 IEC 57 or heavier cord. Do not use joint connection cable.
Replace the wire if the existing wire (from concealed wiring, or otherwise) is too short.
3
Secure the cable onto the control board with the holder (clamper).
4
Attach the control board cover back to the original position with screw.
5
For wire stripping and connection requirement, refer to instruction 11.2.4 of indoor unit.
Result
Leakage found
Re-tighten the
connecting portion with
torque wrenches.
Leakage ceased
Leakage persists
Locate and repair leak
Leakage ceased
Terminals on the outdoor unit
Colour of wires
Terminals on the indoor unit
Terminal board
Indoor unit
Lo
OPEN
4(A). Checking gas leakage for left piping
1) a. Connect the manifold gauge to
b. Measure the pressure.
2) a. Keep it for 5-10 minutes.
b. Ensure that the pressure indicated
1
2
1
2
27
To indoor unit
Liquid side
Gas side
2-way valve (open)
Cap
3-way valve (open)
Hexagonal wrench
Service port cap
Liquid side
Outdoor unit
Close
Gas side
Close
Hi
CLOSE
Following Result of
the right side piping.
the service port of 3-way valve.
on the gauge is the same as that
of measured during the fi rst time.
Control
board
cover
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