11
Trail Operation And Testing
1. Trial operation and testing
• Check that the inter-unit wire is correctly connected.
• Trial operation should be carried out in COOL operation.
1-1 Measure the supply voltage and make sure that it is within the specified range.
1-2 Select the lowest programmable temperature.
1-3 Carry out the trial operation following the instructions in the operation manual to ensure that all functions and parts,
such as the movement of the flaps, are working properly.
• To protect the air conditioner, restart operation is disabled for 3 minutes after the system has been turned off.
1-4 After trial operation is complete, set the temperature to a normal level (26
°
C to 28
°
C in COOL operation, 20
°
c to 24
°
C
in HEAT operation).
• When operating the air conditioner in COOL operation in winter, or HEAT operation in summer, set it to the trial operation mode using the following method.
1) Press NMODE" button and select the cooling or heating mode.
2) Press "ON/OFF" button to turn on the system.
3) Press both of "TEMP" button and NMODE" button at the same time.
4) Press "TEMP· button, select Nr•, and press "MODE" button for confirmation.
• Trial operation will stop automatically after about 30 minutes. To stop the operation press ·oN/OFF" button.
• The air conditioner draws 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
turned on again.
2. Items to Check
Test Items
Symptom
Check
Indoor and outdoor units are installed securely.
Fall, vibration, noise
No refrigerant gas leaks.
Incomplete cooling function
Refrigerant gas and liquid pipes and indoor drain hose
Water leakage
extension are thermally insulated.
Draining line is properly installed.
Water leakage
System is properly earthed.
Electrical leakage
Only specified wires are used for all wiring, and all
No operation or burn damage
wires are connected correctly.
Indoor or outdoor unit's air intake or exhaust has clear path of air. Incomplete cooling function
Stop valves are opened.
Incomplete cooling function
Indoor unit properly receives remote controller commands.
No operation
Pump Down Operation
� WARNING---------------
• Make sure that air or any matter other than refrigerant (R32) does not get into the refrigeration cycle.
• When performing a pump down, turn off the compressor before detaching the refrigerant pipes. {If the refrigerant pipes are detached when
the compressor is operating and the stop valves are open, air will be drawn in leading to abnormally high pressure in the
refrigeration cycle. This may result in rupturing and bodily injury.)
In order to protect the environment, be sure to pump down when relocating or disposing of the unit.
1) Remove the valve cap from the liquid stop valve and gas stop valve.
2) Begin 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.
5) Attach the valve cap once procedures are complete.
Forced cooling operation
■ Using the indoor unit ON/OFF switch
Press and hold the indoor unit ON/OFF switch for at least 5 seconds. (The operation will start.)
• Forced cooling operation will stop automatically after about 15 minutes.
To stop the operation, press the indoor unit ON/OFF switch.
Disclaimer: Appearance of indoor & outdoor unit may differ
between different models.
Hexagonal
wrench
