TESTING
Safety and leakage check
Electrical safety check
Perform the electric safe check after completing installation:
1. 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 4
¸
2. Electrical leakage check (performing during test running)
During test operation after finishing installation, the serviceman can use the multimeter
and probe to perform the electrical leakage check. Turn off the unit immediately if
leakage happens. Check and fix before operating the unit.
Gas leak check
1. 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.
2.
Leak detector
Use the leak detector to check for leakage.
CAUTION
A: Low valve B: Hi valve
C and D are for indoor unit connection.
Testing
Indoor unit
check point
Cover
Outdoor unit
check point
Fig.62
D
C
B
A
Perform test operation after completing gas leak check at the flare nut connections and
electrical safety check.
Check that all tubing and wiring have been properly connected.
Check that the gas and liquid side service valves are fully open.
1. Connect the power, press the ON/OFF button on the remote controller to turn the unit on.
2. Use the MODE button to select COOL, HEAT, AUTO and FAN to check if all the functions
work well.
3.
When the ambient temperature is too low (lower than 17 C), the unit cannot be controlled by
the remote controller to run at cooling mode, manual operation can be taken. Manual
operation is used only when the remote controller is disabled or maintenance is necessary.
Press the manual control button on the right side of the panel frame to select the AUTO or
COOL, the unit will operate under Forced AUTO or COOL mode
.
4. The test operation should last about 30 minutes.
Manual control
button
25