En-6
5.5. Test run
1. Make a TEST RUN in accordance with installation instruction sheet for the
indoor unit.
CHECK ITEMS
INDOOR UNIT
(1) Is operation of each button on the remote control unit normal?
(2) Does each lamp light normally?
(3) Do the air flow-direction louver operate normally?
(4) Is the drain normal?
(5) Is there any abnormal noise and vibration during operation?
OUTDOOR UNIT
(1) Is there any abnormal noise and vibration during operation?
(2) Will noise, wind, or drain water from the unit disturb the neighbors?
(3) Is there any gas leakage?
• Do not operate the air conditioner in the test running state for a long time.
• For the operation method, refer to the operating manual and perform operation check.
6. PUMP DOWN
6.1. Pump down
PUMP DOWN OPERATION (FORCED COOLING OPERATION)
To avoid discharging refrigerant into the atmosphere at the time of relocation or disposal,
recover refrigerant by doing the cooling operation or forced cooling operation according
to the following procedure. (When the cooling operation cannot start in winter, and so on,
start the forced cooling operation.).
(1) Do the air purging of the charge hose by connecting the charging hose of gauge mani-
fold to the charging port of 3 way valve and opening the low-pressure valve slightly.
(2) Close the valve stem of 2 way valve completely.
(3) Start the cooling operation or following forced cooling operation. Keep on pressing the
MANUAL AUTO button of the indoor unit for more than 10 seconds. The operation in-
dicator lamp and timer indicator lamp will begin to flash simultaneously during test run.
(The forced cooling operation cannot start if the MANUAL AUTO button is not kept on
pressing for more than 10 seconds.)
(4) Close the valve stem of 3 way valve when the reading on the compound pressure
gage becomes 0.05~0 Mpa (0.5~0 kg/cm
2
).
(5) Stop the operation.
• Press the START/STOP button of the remote control unit to stop the operation.
• Press the MANUAL AUTO button when stopping the operation from indoor unit side. (It
is not necessary to press on keeping for more than 10 seconds.)
CAUTION
During the pump-down operation, make sure that the compressor is turned off before
you remove the refrigerant piping.
Do not remove the connection pipe while the compressor is in operation with 2 way or
3 way valve open. This may cause abnormal pressure in the refrigeration cycle that
leads to breakage and even injury.
9377863133_IM.indb 6
9377863133_IM.indb 6
11/25/2011 11:30:59 AM
11/25/2011 11:30:59 AM
