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42
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Cooling
Heating
Gas operation valve charge port
Suction pressure (low pressure)
Discharge pressure (high pressure)
Check joint in the unit
Discharge pressure (high pressure)
Suction pressure (low pressure)
(
5
) Test run
(a)
Test run method
1) A test run can be initiated from an outdoor unit by using SW9 (SW2) and SW5-4 for on-site setting.
2) Models FDCVA151~251
When SW9 (press button switch) is pressed for 1 second and then released, the compressor will start operation approxi-
mately 5 seconds later.
Models FDCA301~601
Press SW2 (push-button switch) for one second. The compressor will start when the button is released. The compressor
will stop when 30 minutes elaps.
3) The unit will start a cooling operation, when SW5-4 is OFF, or a heating operation, when SW5-4 is ON.
4) When a test run is completed, press SW9 (SW2) (push-button switch) again for one second and then release it.
Note (1) Items in ( ) show for the FDCA 301~601.
(b) Checking the state of the unit in operation
Check discharge pressure and suction pressure, using the check joint provided inside the outdoor unit and the gas charge
valve charge port. The check joint in the unit is provided on the pipe connecting the four-way valva and the heat exchanger,
and these points offer different pressure measurements depending on a cooling or heating operation as summarized in the
table below.
(c) Setting SW5-1, SW5-2 on-site
1) Defrost conteol switching (SW5-1)
a) When this switch is turned on, the unit will run in the defrost mode more frequentiy.
b) Please set this switch to ON, when installed in a region where outdoor temperaure falls below zero during the season
the unit is run for a heating operation.
2) Snow guard fan control (SW5-2)
a) When this switch is turned on, the outdoor unit fan will run for 10 seconds in every 10 minutes, when outdoor tempera-
ture falls to 3˚C or lower and the compressor is not running.
b) When the unit is used in a very snowy country, please set this switch to ON.
