59
Pass/Fail
Check list
Oil leak
Check if there is oil leaking from the compressor and piping.
If there is an oil leak, try to repair the leak. If the repair is not successful, please call the local agent.
Refrigerant leak
Check for refrigerant leaks inside the unit. If there is a refrigerant leak, try to repair the leak. If the repair is
not successful, please call the local agent.
Do not come into contact with the refrigerant leaking from the refrigerant piping connections. It may cause
frostbite.
Flammable refrigerant.
If there is a refrigerant leak, keep ventilation to avoid the risk of refrigerant stagnating.
If a leak is suspected, all naked flames shall be removed/extinguished.
If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the
system, or isolated (by means of shut off valves) in a part of the system remote from the leak.
Line Voltage is checked and verified to be within specified range for all system components.
Power the outdoor units 12 hours before operation in order to have power running to the crankcase heater
and to protect the compressor.
Indoor Unit
• The wired/remote controller switch is operating normally.
• The display of the wired/remote controller is normal, the function keys work normally, the room
temperature adjustment is normal, and the air flow and direction adjustment are normal.
• The LED indicator is on.
• Water drainage is normal.
• Check the indoor units one by one for normal operation, and the cooling and heating functions are
normal without vibration or abnormal sound.
Outdoor Unit
• There are no vibrations or strange sounds during operation.
• The fan, noise and condensation do not affect the neighbors.
• There is no refrigerant leakage.
NOTE
Refer to the "Symptoms That Are Not Faults" in the "Operation" in this manual.
