Flow Chart Of Troubleshooing; Malfunction Display: E1 Compressor High Pressure Protection - Gree GWHD14NK3BO Service Manual

2. Flow Chart of Troubleshooing

solve the faulted parts.
Find the malfunction reason carefully as unit may occur several malfunction at the same time and one malfunction

Malfunction display: E1 Compressor High Pressure Protection

High pressure protection
Check if the pressure is really high pressure with the
measurement of a manometer
Check if operation mode of indoor unit is
properly set
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
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
Y
Y
N
Y
N
Y
N
Y
N
Y
N
run
Y
N
Y
N
Y
N
N
Check if pressure switch
is abnormal
Refer to Instruction
Manual of indoor unit
Completely open the
valve
Close the panel
Remove the barrier
Measure the fan motor and
signal input
Measure swing motor and
signal input
Refer to Care and Maintenance
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.
N
Replace the outdoor
unit mainboard
Y
Replace pressure switch
Troubleshooting
77