Gree GWHD24NK3FO Service Manual page 71

Service Manual
2. Flow Chart of Troubleshooing
Service personnel shall collect the malfunction information as much as possible and research them thoroughly, list
solve the faulted parts.
Observe the status of the complete device and do not observe the partial
It is advised to start from the simple operation during analyzing ,judging and confirming malfunction reason, then
Find the malfunction reason carefully as unit may occur several malfunction at the same time and one malfunction
may develop into several malfunction, so entire system analysis shall be established to make the judged result exact and
credible.
Malfunction display: E1 Compressor 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
Check if gas valve and liquid valve are
Check if the panel of outdoor unit is
Check if the air return and supply from heat
exchanger of indoor unit and outdoor unit is
Check if indoor unit fan and outdoor unit fan
Check if swing louver of indoor unit is
Check if there is filth blockage to indoor/
outdoor filter or heat exchange fin
Installation and Maintenance
High pressure protection
Yes
Yes
properly set
Yes
completely open
Yes
firmly closed?
Yes
smooth
Yes
run
Yes
completely open
Yes
Yes
System pipeline is blocked
Check if pressure switch
No
is abnormal
Refer to Instruction
No
Manual of indoor unit
Completely open the
No
valve
Close the panel
No
Remove the barrier
No
Measure the fan motor and
No
signal input
Measure swing motor and
No
signal input
No Refer to Care and Maintenance
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.
Replace the outdoor
No
unit mainboard
Replace pressure switch
Yes
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