Low Pressure Protection - Gree Neo GWH09MA-A3DNA3A Installation, Service & Troubleshooting

E3 Error Codes
Compressor Low Pressure Protection
E3

Low Pressure Protection

Status:
Cooling operation, compressor stops while
indoor fans runs. Heating operation, complete
unit stops
Low Pressure Protection
Yes
Verify low pressure with gauge
Yes
Check if the refrigerant is sufficient
Yes
Check if operation mode of indoor unit is set
properly
Yes
Check if gas and liquid valves are open
Yes
Check if panel of outdoor unit is firmly closed
Yes
Check air flow of indoor and outdoor units for
obstructions
Yes
Check for indoor and outdoor fan operation
Yes
Check operation of swing louver
Yes
Check indoor filter and coils for dirt
Yes
System piping is blocked
Error Code Diagnostics
Fault & Status
No
No
No
No
No
No
No
No
No
No
Possible Causes
1. Low refrigerant charge
2. Improper indoor mode setting
3. Improper fan operation
4. Refrigerant valve not fully opened
Refer to high pressure protection
Charge refrigerant according to the amount
specified in the nameplate and calculated
additional amount
Refer to instruction manual of
indoor unit
Completely open all valves
Close the panel
Remove the barrier
Measure the fan motor input
Measure swing motor signal input
Refer to care and maintenance
Check inlet and outlet of main pipes
connecting each indoor unit and capillary of
indoor and outdoor units. Replace the parts
such as filter, etc as needed.
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