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Checking the power cord
Checking the Power Cord
If the main cable for power supply is connected incorrect or wrong, it shall cause strange noise from
the compressor and cooling operation does not work.
Troubles and Solutions
Troubles
➲
Occurrence of strange noise from
compressor
➲
No variation of pressure gages.
Outdoor unit circuit
Outdoor Unit
Test Running
1. Check that all tubing and wiring have been properly connected.
2. Check that the gas and liquid side service valves are fully open.
Evaluation of the performance
Operate unit for 15~20 minutes, then check the
system refrigerant charge:
1. Measure the pressure of the gas side
service valve.
2. Measure the temperature of the intake and
discharge of air.
3. Ensure the difference between the intake
temperature and the discharge is more than
8°C
4. For reference, the gas side pressure of
optimum condition is as below.(Cooling)
Outside ambient
Refrigerant
TEMP.
R-22
35°C (95°F)
R-410A
35°C (95°F) 8.5~9.5kg/cm
32 Concealed Duct Air Conditioner
R S T N
Terminal
block
change
The pressure of the gas side
service valve.
4~5kg/cm
2
G(56.8~71.0 P.S.I.G.)
2
G(120~135 P.S.I.G.)
Solutions
➲
Change the R,S wires to the terminal
block.
Power Supply Cable
: If the actual pressure are higher than
NOTICE
shown, the system is most likely over-
charged, and charge should be removed.
If the actual pressure are lower than
shown, the system is most likely
undercharged, and charge should be
added.
The air conditioner is now ready for use.
building
R S T
N
Discharge air
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