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12. Testing and Commissioning
12.1 Precautions Regarding Test Run
12.2 Check before Test Run
Content check
Power supply cable
Indoor/outdoor connection wire
Earth wire
Is the wire set up and connected as described in the instructions? Check for any phase
sequence.
Are the wire connection’s screws loose?
Is the open and close device / leakage breaker installed?
Is the power supply cable’s thickness and length appropriately measured as described in the
instructions?
Is it earthed (grounded)?
Check that the insulation resistant value is more than 1 M.
Use the 500 V mega-testers to measure the insulation.
Do not use the mega-testers for any other circuit except for voltage of 220 V to 240 V.
Are the wire connections for the indoor/outdoor units connected as described in the
instructions? Are there any looped wires?
Refrigerant pipe
Is the piping installed as described in the instructions?
Are the pipes sizes appropriate?
Does the pipe’s length adhere to the specifications?
Is the branch pipe slant being appropriately done as described in the instructions?
Was vacuum removal sufficiently carried out?
Was the leak tightness test carried out with nitrogen gas? Use the testing pressure of 4.15
MPa.
Is the piping insulation material appropriately installed? Insulation material is necessary for
both gas and liquid piping.
Is the 3-way valve for the liquid side and gas side open?
Filling additional refrigerant This product is charge-free. No additional refrigerant is necessary.
Other
Does the indoor unit’s connection capacity fall within the range of 50 to 130%?
Check that the refrigerant piping and the related wiring is connected to the same refrigerant
system.
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