Malfunction Display: E3 Compressor Low Pressure Protection - Gree GWHD14NK3BO Service Manual

Troubleshooting

Malfunction display: E3 Compressor Low Pressure Protection

Check if the pressure is really low pressure
with the measurement of a manometer
Check if the refrigerant in the
Check if gas valve and liquid valve
are completely open
Check if the panel of outdoor
unit is firmly closed ?
Check if the air return and supply from
heat exchanger of indoor unit and outdoor
unit is smooth
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
System pipeline is blocked
78
Compressor Low
Pressure Protection
Y
Y
system is sufficient
Y
Check if operation mode of
indoor unit is properly set
Y
Y
Y
Y
Y
Y
Y
N
Refer to the high pressure
protection
Charge refrigerant according to the amount
N
specified in the nameplate and calculated
additional amount
N
Refer to Instruction Manual of indoor unit
N
Completely open the valve
N
Close the panel
N
Remove the barrier
N
Measure the fan motor and
signal input
N
Measure swing motor and
signal input
N
Refer to Care and Maintenance
N
Mainly check the inlet and outlet of main pipe connecting with each indoor unit and
capillary of indoor and outdoor units. Replace the parts like filter, capillary and so on.