Sanyo CHDX09663 Refrigerant Recovery Procedures Indoor Unit, Cooling operation for all units

5. Recovering Refrigerant

W-2WAY ECO-i SYSTEM Outdoor Unit Repair Procedures

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.

2

START

5-2-1. Cooling operation (for all units)

Ball valve is provided in the indoor unit

YES

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 is recovered)

YES

Power can independently be turned off

for indoor unit where refrigerant is recovered

YES

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

	5-2-3. Refrigerant recovery
NO
	procedures (2)

		Fig.8
NO
	Modify power to permit turning off
	power to refrigerant-recovered
NO
	indoor units independently

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

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

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

END

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

1 Connect the outdoor unit maintenance remote controller to the RC connector (CN006) (3P) (BLU) on any

one of the outdoor unit control PCBs. Then start a test run of all units. (Press and hold the (CHECK) button for 4 seconds or longer.)

2Press the (MODE) button and change to cooling operation and ensure that the cooling is performed. 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 tubing.

Cooling : low temperature (68 °F or lower)

Heating : high temperature (140 °F or higher)

CAUTION

The gas tubing becomes hot (140 °F or higher) in heating mode. Be careful so as not to be burnt when touching the tubing.

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