Sanyo 2-WAY ECO-i SPW-C0705DXHN8 Service Manual page 48

5. Recovering Refrigerant
5-2. Refrigerant Recovery Procedures (Indoor Unit)
The flowchart below shows the refrigerant recovery procedures you must follow when replacing or repairing the
indoor unit due to trouble in the refrigerant circuit.
5-2-1. Cooling operation (for all units)
Ball valve is provided in the indoor unit
5-2-2. Refrigerant recovery
procedures (1)
Turn off all equipment in system
When replacing or repairing a faulty
unit, let other normal indoor units run
(excluding indoor unit where refrigerant
2
is recovered)
Power can independently be turned off
for indoor unit where refrigerant is
recovered
Change controllable number of indoor
units (including changes in group
control and integrated-control settings)
Other indoor units can operate normally
Replace or repair faulty unit
Check for leakage in repaired unit H
Evacuate air from repaired unit H
Charge refrigerant in repaired unit H
(Amount of charge should equal that
recovered by refrigerant recovery unit)
Change controllable number of indoor
units (including changes in group
control and integrated-control settings)
Open ball valve
Ready for normal operation
# Service work performed on indoor units is done simultaneously using the service ports at the liquid (narrow tube) side
and the gas (wide tube) side ball valves. Refer to each section in the "Installation Instructions" on refrigerant charging,
leak checking, and evacuation procedures.
5-2-1. Cooling operation (for all units)
(1) If the remote controller (RCS-TM80BG) is used for maintenance of the outdoor unit
Connect the outdoor unit maintenance remote controller to the RC connector (CN006) (3P) (BLU) on any
1
one of the outdoor unit control PCBs. Then start a test run of all units. (Press and hold the
button for 4 seconds or longer.)
2
Press the
formed. Refer to the test run service manual for the detail of the outdoor maintenance remote controller
operation. It may be possible to determine whether operation is cooling or heating by touching the gas tub-
ing.
Cooling : low temperature (20℃ or lower)
Heating: high temperature (60℃ or higher)
CAUTION
START
NO
YES
NO
YES
Modify power to permit turning off
NO
YES
END
(MODE) button and change to cooling operation and ensure that the cooling is per-
The gas tubing becomes hot (60℃ or higher) in heating mode. Be careful so as not
to be burnt when touching the tubing.
5-2-3. Refrigerant recovery
procedures (2)
Fig.8
power to refrigerant-recovered
indoor units independently
2 - 10
W-2WAY ECO-i SYSTEM
Outdoor Unit Repair Procedures
Turn off all equipment in system
Replace or repair faulty unit
Check for leakage in repaired unit
Evacuate air from repaired unit
Charge refrigerant in repaired unit
(Amount of charge should equal that
recovered by refrigerant recovery unit)
Ready for operation
END
Replace or repair faulty unit
Check for leakage in repaired unit H
Evacuate air in repaired unit H
Charge refrigerant in repaired unit H
(Amount of charge should equal that
recovered by refrigerant recovery unit)
Open the ball valve
Ready for normal operation
END
(CHECK)