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Electrical safety
Perform the electric safety check after completing installation:
1. Insulated resistance: The insulated resistance must be more than 2MΩ.
2. Grounding work: After finishing grounding work, measure the grounding
resistance by visual detection and grounding resistance tester. Make sure the
grounding resistance is less than 4Ω.
3. Electrical leakage check (performing during test running): During test
operation after finishing installation, the serviceman can use the electric
probe and multimeter to perform the electrical leakage check. Turn off the unit
immediately if electrical leakage happens. Check and find out the solution
ways till the unit operates properly.
Gas leak check
Soap water method
Apply a soap water or a liquid
neutral detergent on the indoor unit
connection or outdoor unit connections
by a soft brush to check for leakage
of the connecting points of the piping.
If bubbles come out, the pipes have
leakage point.
Leak detector
Use the leak detector to check for
leakage.
Caution
A: Low side valve, B: High side valve
valve C and D are ends of indoor unit
connection.
Electrical safety & Gas leak check
21
indoor unit
check point
Cover
Outdoor unit
check point
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