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9.2.2 E1 Malfunction
Start
Are the display panel and main board
connected tightly?
yes
Are the OVC terminal
on the main board connected
well with the high pressure switch on the
complete unit?
yes
Is the wiring of high pressure
switch loosened? Is the high pressure switch broken
or poorly contacted?
no
Is the refrigerant superabundant?
no
Is there poor heat
exchange? (Including filth blockage of heat
exchanger and bad radiating
environment );
no
Is the ambient temperature
too high?(If it is a 3-phase unit, high pressure
protection may be caused by overcurrent
protection due to this)
no
Is the supply voltage normal?
(If it is a 3-phase unit, high pressure protection may
be caused by overcurrent protection
due to this)
yes
Are the air
intake and air discharge at indoor / outdoor heat
exchanger smooth?
yes
Is there filth blockage on the filter or on the
heat exchanger fins of indoor / outdoor unit?
no
Is there blockage inside the pipeline of the system
no
Are the gas valve and liquid valve for
outdoor unit opened completely?
yes
Replace the controller
End
32
Connect the display panel with the main board well
no
no
Connect the OVC terminal on the main board with
no
the high pressure switch on the complete unit well
no
If the wire of high pressure switch is loosened, please
connect the wires according to the circuit diagram.
yes
If the high pressure switch is broken or poorly contacted,
please replace it.
no
Adjust the volume of refrigerant according to the
yes
requirement of the system
no
Adjust the unit to improve the heat exchange of unit
yes
no
Decrease the ambient temperature
yes
no
The normal voltage is lower than 90% of the rated
no
voltage on the nameplate
no
Adjust the system to make the air intake and air
no
discharge of indoor and outdoor heat exchangers
smooth
no
Remove the blockage.
no
no
yes
Remove the blockage inside the pipeline of the system
no
Open the outdoor gas valve and liquid valve completely
no
no
Service Manual
Malfunction is eliminated.
yes
Malfunction is eliminated.
yes
Malfunction is eliminated.
yes
Malfunction is eliminated.
yes
Malfunction is eliminated.
yes
Malfunction is eliminated.
yes
Malfunction is eliminated.
yes
Malfunction is eliminated.
yes
Malfunction is eliminated.
yes
Malfunction is removed.
yes
Malfunction is eliminated.
yes
Installation and Maintenance
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