Gree GVH24AK-K3DNC8A Service Manual page 50

Service Manual
5. Malfunction of Protection of High Pressure Protection (E1)
Are the display panel and main board
Are the OVC terminal on the main board connected
well with the high pressure switch on the complete
Is the wiring of high pressure switch loosened? Is the high
pressure switch broken or poorly contacted?
Is the refrigerant superabundant?
Is there poor heat exchange? (Including filth
blockage of heat exchanger and bad radiating
Is the ambient temperature too high?
(If it is a 3-phase unit, high pressure protection may be
caused by over current protection due to this)
Is the supply voltage normal? (If it is a 3-phase unit, high
pressure protection may be caused by overcurrent
intake and air discharge at indoor / outdoor heat
Is there filth blockage on the filter or on the
heat exchanger fins of indoor / outdoor unit?
Is there blockage inside the pipeline of the system
Are the gas valve and liquid valve for
outdoor unit opened completely?
Installation and Maintenance
Start
no
connected tightly?
yes
no
unit?
yes
yes
no
yes
no
yes
environment );
no
yes
no
no
protection due to this)
yes
Are the air
no
exchanger smooth?
yes
yes
no
yes
no
no
yes
Is the high pressure signal
no
at high level?
yes
Replace the controller
End
Connect the display panel with the main board well
no
Connect the OVC terminal on the main board with 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.
If the high pressure switch is broken or poorly contacted,
please replace it.
no
Adjust the volume of refrigerant according to the
requirement of the system
no
Adjust the unit to improve the heat exchange of unit
no
Decrease the ambient temperature
no
The normal fluctuation is within 10% of the rated voltage on
the nameplate
no
Adjust the system to make the air intake and air discharge of
indoor and outdoor heat exchangers smooth
no
Remove the blockage.
no
Remove the blockage inside the pipeline of the system
no
Open the outdoor gas valve and liquid valve completely
no
Check the system further
no
Malfunction is eliminated.
yes
yes
Malfunction is eliminated.
Malfunction is eliminated. yes
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
Malfunction is eliminated.
47