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5.8. CUSTOMER GUIDANCE
Explain the followings to the customer in accordance with the operating manual:
(1) Starting and stopping method, operation switching, temperature adjustment, timer,
airfl ow switching, and other remote controller operations.
(2) Air fi lter removal and cleaning, and how to use the airfl ow direction louvers.
(3) Give the operating and installation manuals to the customer.
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
(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.)
En-5
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