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11 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
How is the installation?
Have you done the refrigerant leakage test?
Is heat insulation sufficient?
Does the unit drain well?
Is the voltage in accordance with the rated voltage
marked on the nameplate?
Is the electric wiring and piping connection
installed correctly and securely?
Has the unit been connected to a secure earth
connection?
Is the power cord specified?
Has the inlet and outlet been covered?
Has the length of connection pipes and refrigerant
capacity been recorded?
11.3 Checking items after installation
Malfunction
Ducted air
conditioning unit
can not start-up
Possible cause
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
Has it been fixed firmly?
The unit may drop, shake or emit noise.
It may cause insufficient refrigerating capacity.
It may cause condensation and dripping.
It may cause condensation and dripping.
It may cause electric malfunction or damage the
part.
It may cause electric malfunction or damage the
part.
It may cause electrical leakage.
It may cause electric malfunction or damage the
part.
Insufficient refrigerating capacity.
The refrigerant capacity is not accurate.
Solution
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
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