Safety
Precautions
Electrical and Gas
Leak Checks
Electrical and Gas Leak Checks
Before Test Run
Only perform test run after you have
completed the following steps:
● Electrical Safety Checks – Conrm that
the unit’s electrical system is safe and
operating properly
● Gas Leak Checks – Check all are nut
connections and conrm that the system
is not leaking
● Conrm that gas and liquid (high and low
pressure) valves are fully open
Electrical Safety Checks
After installation, conrm that all electrical
wiring is installed in accordance with local
and national regulations, and according to
the Installation Manual.
BEFORE TEST RUN
Check Grounding Work
Measure grounding resistance by visual
detection and with grounding resistance
tester. Grounding resistance must be less
than 0.1Ω.
Note: This may not be required for some
locations in the US.
DURING TEST RUN
Check for Electrical Leakage
During the Test Run, use an electroprobe
and multimeter to perform a comprehensive
electrical leakage test.
If electrical leakage is detected, turn off
the unit immediately and call a licensed
electrician to nd and resolve the cause of
the leakage.
Note: This may not be required for some
locations in the US.
WARNING – RISK OF ELECTRIC
SHOCK
ALL WIRING MUST COMPLY WITH
LOCAL AND NATIONAL ELECTRICAL
CODES, AND MUST BE INSTALLED
BY A LICENSED ELECTRICIAN.
Gas Leak Checks
There are two different methods to check for
gas leaks.
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. The
presence of bubbles indicates a leak.
Leak Detector Method
If using leak detector, refer to the device’s
operation manual for proper usage
instructions.
AFTER PERFORMING GAS LEAK
CHECKS
After conrming that the all pipe connection
points DO NOT leak, replace the valve
cover on the outside unit.
A
B
C
D
Check-point of indoor unit
Check-point of outdoor unit
A: Low pressure stop valve
B: High pressure stop valve
C& D: Indoor unit are nuts
Page 21-GB
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