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6.TROUBLESHOOTING
6.1 Error code
There are multiple sensors built inside the unit. When an error is detected, the error icon
will flash with the error code displayed. Check the table below for the meaning of the error
codes and contact customer service when needed.
Code
Cause
Troubleshooting
E0
Ambient temperature sensor
(White 2 pin connector)
Use a flathead screw driver to pry open the display panel.
Ensure the white 2pin connector is seated properly. Replace
the sensor or the display panel if needed
E1
Evaporator temperature sensor
(Red 2 pin connector)
E1: Use a flathead screw driver to pry open the display panel.
Ensure the red 2pin connector is seated properly. Replace
the sensor or the display panel if needed.
E2
Over-current
Verify there is no short in the wiring harness. Make sure the
outside fan and the side/bottom air inlet are not blocked.
Rinse the condenser with water to clean off elements.
E3
Blocked rotor
Contact customer service
E4/EL
Low-voltage
Check the system and battery voltage. By default, this error
code triggers when voltage drops below 10.5V/21.5V Make
sure the wiring is connected properly and there is no loose
nuts or crimps
E5
Short protection/faulty controller
Contact customer service
E6/EH
Over-voltage
Check the system voltage. It should be less than 15V/30V
E7
Compressor startup failure
Contact customer service
E8
Condenser fan
Make sure condenser fan connector is seated properly.
EF
Evaporator blower fan
Make sure the blower fan connector is seated properly. Pry
open the display panel and make sure the fuse is intact.
Eb
Controller lack-phase
Contact customer service
EU
Controller overheated
Let the unit sit for ten minutes and restart the unit