16
English
Trial Operation and Testing
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
• In cooling mode, select the lowest programmable temperature; in heating mode, select the highest programmable
temperature.
1) Trial operation may be disabled in either mode depending on the room temperature.
2) After trial operation is complete, set the temperature to a normal level (26°C to 28°C in cooling mode, 20°C to 24°C
in heating mode).
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.
2.
Fault diagnosis by LED on outdoor unit PCB
NOTE
Error detection should be done using the remote control fault diagnosis.
3.
Test items
Diagnosis
LED is flashing
Normal -> check the indoor unit
LED is ON
Turn the power OFF and then ON again and check the LED within approx. 3 min-
utes. (If the LED display recurs, the outdoor unit PCB is fault.)
LED is OFF
CASE1:
Supply voltage (For power saving)
CASE2:
Power supply fault
CASE3:
Turn the power OFF and then ON again and check the LED within
approx. 3 minutes. (If the LED display recurs, the outdoor unit PCB is fault.)
Test items
Symptom
Check
Indoor and outdoor units are installed properly on solid bases.
Fall, vibration, noise
No refrigerant gas leaks.
Incomplete cooling/heating
function
Refrigerant gas and liquid pipes and indoor drain hose extension are
thermally insulated.
Water leakage
Draining line is properly installed.
Water leakage
System is properly earthed.
Electrical leakage
Electric wires are connected correctly.
Incomplete cooling/heating
function
The specified wires are used for inter-unit wiring.
Inoperative or burn damage
Indoor or outdoor unit’s air inlet or air outlet has clear path of air.
Stop valves are opened.
Incomplete cooling/heating
function
Indoor unit properly receives remote control commands.
Inoperative
3PEN386698-4L.book Page 16 Thursday, April 27, 2017 8:43 AM
