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4.2
Electrical Safety Check
Perform the electric safety check after
completing installation:
1.
Earthing work
•
After finishing earthing work, measure
the earthing resistance by visual
detection and earthing resistance tester.
2.
Electrical leakage check (performing
during test running)
•
During test operation after finishing
installation,the service person can
use the electric probe and multimeter
to perform the electrical leakage
check. Turn off the unit immediately if
refrigerant leakage happens. Check and
find out the solution ways till the unit
operate properly.
4.3
Operation Test
1.
Before Operation Test
• Do not switch on power before
installation is finished complete.
• Electric wiring must be connected
correctly and securely.
• Stop valves of the connection pipes
should be fully opened.
• All the impurities such as scraps and
waste must be cleared from the unit.
2.
Operation Test Method
• Switch on power and press “ON/OFF”
button on the remote controller to start
the operation.
• Press the button to select the COOL,
HEAT (if applicable), FAN or any other
mode to check if all the functions work
well.
• When the ambient temperature is lower
than setting temperature, the unit can
not be set on the remote controller
to work in COOL mode. Please use
the Emergency Operation mode
which is used only when the remote is
unavailable or in case of maintenance.
4.4
Pump Down
When relocating or disposing of the air
conditioner, pump down the system
following the procedure as below so
that no refrigerant is released into the
atmosphere.
• Connect the hose of manifold valve to
the charge port of stop valve on the gas
pipe side of the outdoor unit.
• Close the stop valve on the gas pipe
side almost completely.
• Fully close the stop valve on the liquid
pipe side.
• Turn on the unit in COOL mode.
• Fully close the stop valve on the gas
pipe side when the pressure gauge
shows 1 - 0.5 kgf/cm2 (100 ~ 50 kPa).
• Stop the operation by turn the unit off
and all the refrigerant gas has been
collected in the outdoor unit.
4.5
Check After Installation
Items to be checked
Possible malfunction
The unit may drop, shake or
emit noise.
Have you done the
refrigerant leakage test?
cooling (heating)
Is thermal insulation
It may cause condensation.
Is water drainage
satisfactory?
It may cause water leakage.
Is the voltage in
accordance with the
rated voltage marked on
the nameplate?
It may cause electric
malfunction or damage the
unit.
Is the electric wiring
or piping connection
installed correctly and
securely?
It may cause electric
malfunction or damage the
parts.
Has the unit been
securely earthed?
It may cause electrical
leakage.
Is the power cord
It may cause electric
malfunction or damage the
parts.
cooling (heating)
Is the air inlet or
outlet blocked
Are the stop valves of
the connection pipes
fully opened?
It may cause insufficient
cooling (heating)
