Gree GWC36LB-D1NNA2A/I Service Manual page 46

Troubleshooting
Troubleshooting for antifreezing protection (E2)
Malfunction diagnosis flowchart:
Poor air return in the indoor unit
The fan speed is abnormal
Evaporator is dirty
System is normal, but the indoor tube
temperature sensor
Is abnormal
Replace the
controller
Start
yes
no
yes
no
yes
yes
no
End
Solve the
Eliminate the
corresponding
malfunction
system problem
no
Solve the
Eliminate the
corresponding
malfunction
speed problem
no
Clean the Solve the
evaporator problem
no
Replace the
Solve the
temperature
problem
sensor
no
yes
yes
yes
yes
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