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11
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Trial run and installation checking
11.1. Trial run
1). Preparation for trial run
The power supply should be turned on only after finishing all the installation.
All the control wires and cables are connected correctly and safely.
Open the cut-off valves in the gas and liquid pipes.
All the objects like screws and wires etc that remained in the machine should be cleared after
installation.
2).Trial run
Switch on power supply and press the ON/OFF button to start operation.
Select FAN mode to check if the phases of the indoor motor are correct.
Select COOL, HEAT and FAN mode and check if the machine operates normally.
11.2. Checking items after installation
Item Possible defects Checking
Has it been fixed firmly?
How is the installation?
The unit may drop, shake or emit noise.
Have you done the refrigerant leakage test?
It may cause insufficient refrigerating capacity.
Is heat insulation sufficient?
It may cause condensation and dripping.
Does the unit drain well?
It may cause condensation and dripping.
Is the voltage in accordance with the rated
voltage marked on the nameplate?
It may cause electric malfunction or damage the
part.
Is the electric wiring and piping connection
installed correctly and securely?
It may cause electric malfunction or damage the
part.
Has the unit been connected to a secure earth
connection?
It may cause electrical leakage.
Is the power cord specified?
It may cause electric malfunction or damage the
part.
Has the inlet and outlet been covered?
Insufficient refrigerating capacity.
Has the length of connection pipes and
refrigerant capacity been recorded?
The refrigerant capacity is not accurate.
11.3. Checking items after installation
Malfunction Possible
cause
Solution
Ducted air
conditioni
ng unit
can not
start-up
1. The power supply does not connect or
improper phase sequence.
2.The electricity leakage switch is switching
off for the leakage of electricity from the
air conditioner units
3. The voltage is too low
4. The operating button is closed
5.The control system is in malfunction
1. Connect the power supply or
change two random phase
2. Contact the service center of
FISHER
3. Contact the dealer
4. Press ON/OFF button again
5. Contact the service center of
FISHER
Ducted air Air outlet port or intake port of indoor unit or 1. Move the obstacles