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Note: After confirming that all the pipe connection points DO NOT leak,
replace the valve cover on the outside unit.
Gas Leak Checks
There are two different methods to check for gaseous leaks.
1. Soap and Water Method
Using a soft brush, apply soapy water or liquid detergent to all pipe connection
points on the indoor unit and outdoor unit for more than 3 minutes. If there are
bubbles coming out, there’s a leak.
2. Leak Detector Method
If using a leak detector, refer to the device’s operation manual for proper usage
instructions.
Electrical Safety Checks
After installation, confirm that all electrical wiring is installed in accordance with
local and national regulations, and according to the Installation Manual.
1. Check Grounding Work
Measure grounding resistance by visual detection and with a grounding
resistance tester. Grounding resistance must be less than 4 ohms.
Note: This may not be required for some locations in the US.
● Close the vacuum pump and wait for 5 minutes to ensure there has been no
change in system pressure. If the pressure decreases there may be leakage,
please refer to the Gas Leak Check section.
● Remove the manifold gauge, open the valve core of the liquid valve and gas
valve completely by turning clockwise with a hexagonal allen wrench.
● Tighten the screw caps of the valves and refrigerant charging vent once complete.
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