Installation
Page 54
8. Electrical and Gas Leak Checks
8.1 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.
8.1.1 Before test run
• Check Grounding Work
Measure grounding resistance by visual detection and with
grounding resistance tester. Grounding resistance must be
less than 0.1 Ω.
Note: This may not be required for some locations in the
US.
8.1.2 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 find and
resolve the cause of the leakage.
Note: This may not be required for some locations in the
US.
8.2 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.
8.3 After performing gas leak checks
After confirming that the all pipe connection points DO
NOT leak, replace the valve cover on the outside unit.
9. Test Operation
9.1 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
9.2 Test Run Instructions
You should perform the Test Run for at least 30 minutes.
1. Connect power to the unit.
2. Press the ON/OFF button on the remote controller to
turn it on.
3. Press the MODE button to scroll through the following
functions, one at a time:
• COOL – Select lowest possible temperature
• HEAT – Select highest possible temperature
4. Let each function run for 5 minutes, and perform the
following checks:
List of Checks to Perform
PASS/FALL
No electrical leakage
Unit is properly grounded
All electrical terminals
properly covered
Indoor and outdoor units are
solidly installed
All pipe connection points do
not leak
Outdoor(2) Outdoor(2)
Water drains properly from
drain hose
All piping is properly
insulated
Unit performs COOL
function properly
Unit performs HEAT
function properly
Indoor unit louvers rotate
properly
Indoor unit responds to
remote controller
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