Pump Down Operation
Trial Operation and Testing (1)
1. Trial operation and testing.
1-1 Measure the supply voltage and make sure that it falls in the specified range.
1-2 Trial operation should be carried out in either cooling or heating mode.
For Heat pump
1) In cooling mode, select the lowest programmable temperature; in heating mode, select the highest
programmable temperature.
Trial operation may be disabled in either mode depending on the room temperature.
In that case, use the remote controller for trial operation as described below.
2) After trial operation is complete, set the temperature to a normal level (78˚F to 82˚F (26˚C to 28˚C)in cooling
mode, 68˚F to 75˚F (20˚C to 24˚C) in heating mode).
• For protection, the system disables restart operation for 3 minutes after it is turned off.
For Cooling only
• Select the lowest programmable temperature.
1) Trial operation in cooling mode may be disabled depending on the room temperature.
Use the remote controller for trial operation as described below.
2) After trial operation is complete, set the temperature to a normal level (78˚F to 82˚F (26˚C to 28˚C)).
3) For protection, the system disables restart operation for 3 minutes after it is turned off.
1-3 Carry out the test operation in accordance with the operation manual to ensure that all functions and
parts, such as louver movement, are working properly.
•
The air conditioner requires a small amount of power in its standby mode. If the system is not to be used for
some time after installation, shut off the circuit breaker to eliminate unnecessary power consumption.
• If the circuit breaker trips to shut off the power to the air conditioner, the system will restore the original
operation mode when the circuit breaker is opened again.
1)
After closing the liquid stop valve, close the gas stop valve within 3 minutes, then stop the forced operation.
CAUTION
In order to protect the environment, be sure to pump down when relocating or disposing of the unit.
1) Remove the valve cap from liquid stop valve and gas stop valve.
2) Carry out forced cooling operation.
3) After 5 to 10 minutes, close the liquid stop valve with a hexagonal wrench.
4) After 2 to 3 minutes, close the gas stop valve and stop forced cooling operation.
How to force cooling operation mode
Using the indoor unit ON/OFF switch
Press the indoor unit ON/OFF switch for at least 5 seconds. (Operation will start.)
• Forced cooling operation will stop automatically after around 15 minutes.
To stop force cooling operation, press the indoor unit ON/OFF switch.
Using the main unit’s remote controller
1) Press the MODE button and select the cooling mode.
2) Press the ON/OFF button to turn on the system.
3) Press the both of TEMP button and the MODE button at the same time.
4) Press the MODE button twice. ( will be displayed and the unit will enter test run mode.)
• Test run mode will stop automatically after around 30 minutes. To stop test run mode, press the
ON/OFF button.
Gas
stop valve
Valve cap
Hexagonal
wrench
Close
Liquid
stop valve
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