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again for signs of leaks
a) during cooling mode
b) in heating mode.
lf any bubbles form, the system has a leak and the screw connectors must be retightened using an
open-ended spanner.
K
ELECTRICAL AND GAS LEAK CHECKS
Before Test Run
Only perform test run after you have completed the following steps:
• Electrical Safety Checks - Confirm that the unit’s electrical system is safe and operating properly
• Gas Leak Checks- Check all flare nut connections and confirm that the system is not leaking
• Confirm that gas and liquid (high and low pressure) valves are fully open
Electrical Safety Checks
After installation, confirm that all electrical wiring is installed in accordance with local and national regu-
lations, and according to the lnstallation Manual.
BEFORE TEST RUN
Check Grounding Work
Measure grounding resistance by visual detection and with grounding resistance tester. Grounding resist-
ance must be less than 0.10.
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.
lf electrical leakage is detected, turn off the unit immediately and call a licensed electrician to find 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 compl y 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
lf using leak detector, refer to the device’s operation manual for proper usage instructions.
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