Gree GWHD24NK3FO Service Manual page 72

Malfunction display: E3 Compressor Low Pressure Protection
Check if indoor unit fan and outdoor unit fan run
Check if swing louver of indoor unit is completely open
Check if there is filth blockage to indoor/outdoor
filter or heat exchange fin
70
Compressor Low
Pressure Protection
Yes
Check if the pressure is really low pressure
with the measurement of a manometer
Yes
Check if the refrigerant in the
system is sufficient
Yes
Check if operation mode of
indoor unit is properly set
Yes
Check if gas valve and liquid valve
are completely open
Yes
Check if the panel of outdoor
unit is firmly closed ?
Yes
Check if the air return and supply from
heat exchanger of indoor unit and outdoor
unit is smooth
Yes
Yes
Yes
Yes
System pipeline is blocked
Refer to the high pressure
No
protection
Charge refrigerant according to the amount
No
specified in the nameplate and calculated
additional amount
Refer to Instruction Manual of indoor unit
No
No Completely open the valve
No
Close the panel
No Remove the barrier
Measure the fan motor and
No
signal input
Measure swing motor and
No
signal input
Refer to Care and Maintenance
No
Mainly check the inlet and outlet of main pipe connecting with each indoor unit and
No
capillary of indoor and outdoor units. Replace the parts like filter, capillary and so on.
Service Manual
Installation and Maintenance