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Items to be checked
Possible malfunction
Has the unit been affi xed fi rmly?
The unit may drop, shake or emit noise.
Have you done the refrigerant leakage test?
Insuffi cient cooling or heating.
Is the thermal insulation suffi cient?
Condensation.
Is the water drainage satisfactory?
Water leakage.
Is the voltage in accordance with the rated voltage on the
nameplate?
Electrical malfunction or damage to the unit.
Is the electrical wiring or piping connection installed
correctly and securely?
Electrical malfunction or damage to the parts.
Has the unit been securely grounded?
Electrical leakage.
Is the mains cable as specifi ed?
Electrical malfunction or damage to parts.
Is the air inlet or the air outlet blocked?
Insuffi cient cooling or heating.
Is the length of the connection pipes and the refrigerant
capacity as specifi ed
Inaccurate refrigerant capacity.
Is the length of the connection pipes and the refrigerant
capacity as specifi ed
Inaccurate refrigerant capacity.
Check after installation
Operation test
Before operation test
• Do not connect the unit to the power supply
before the installation is completed.
• The electrical wiring must be connected cor-
rectly and securely.
• The cut-off valves of the connection pipes
must be opened. Refer to the section “Vacu-
uming and leakage test”.
• The unit must be cleaned thoroughly.
Operation test method
1. Connect the unit to the power supply.
2. Press the ON/OFF button to switch on the
unit.
3. Press the MODE button to set the operation
mode and check whether the operation is as
expected.
