Electrical
safety inspection
Check whether the power supply voltage complies with specification.
Check whether there is any wrong or missing connection between the
power lines, signal line and earth wires.
Check whether the earth resistance and insulation resistance comply with
requirements.
Installation
safety inspection
Confirm the direction and smoothness of drainage pipe.
Confirm that the joint of refrigerant pipe is installed completely.
Confirm the safety of outdoor unit, mounting plate and indoor unit
installation.
Confirm that the valves are fully open.
Confirm that there are no foreign objects or tools left inside the unit.
Complete installation of indoor unit air inlet grille and panel.
Refrigerant
leakage detection
The piping joint, the connector of the two valves of the outdoor unit, the
valve spool, the welding port, etc., where leakage may occur.
Foam detection method:
Apply soapy water or foam evenly on the parts where leakage may occur,
and observe whether bubbles appear or not, if not, it indicates that the
leakage detection result is safe.
Leak detector method:
Use a professional leak detector and read the instruction of operation,
detect at the position where leakage may occur.
The duration of leak detection for each position should last for 3 minutes
or more;
If the test result shows that there is leakage, the nut should be tightened
and tested again until there is no leakage;
After the leak detection is completed, wrap the exposed pip connector of
indoor unit with thermal insulation material and wrap with insulation
tape.
23
TEST OPERATION
Do the following checks before test run.
Inspections Before Test Run
Description
Inspection method
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