Installation & Operation Manual (2019, 2020, 2022)

29
Basic Troubleshooting
Malfunction
Possible Reasons
S olution
Start Failure
power line bad, units don’t have power
supply.
Check the indicator LED on the LCID power head,
it should be lit up, if not, push the RESET button,
if still don’t have voltage, but power grid has
output, you need to change the power cord.
Power cord protection trip.
Check the power cord if somewhere is broken,
push the RESET button. If not solved, replace the
power cord.
Power cord isn’t fixed well.
Check that whether power cord is fixed well.
PCB fuse is broken.
Check if any load (in fan, out fan, reversing valve,
power transformer) is short circuit. Eliminate the
error and replace the fuse with the same type.
Bad contact between main board and
control panel.
Check the contact wires, make sure all contact
well.
Compressor delay start.
It’s normal, compressor will start after 3 minutes
Power fail protection.
When power on, because of auto-restart, unit
will delay starting in 120~240s
Unit in protection mode.
Please check the ERROR CODE
Main board or Control panel is bad.
Replace the main board or control panel
Control panel do not work
When the unit is switch to 24V remote
thermostat or 12V smart controller, the
control panel will not be functioning.
If you need to use control panel to take control,
you need to switch the control master. See the
SENIOR SETTINGS section.
Indoor fan/outdoor fan not function or run
slowly
Fan is locked by something or the power
wires are not fixed well; fan capacitor is not
fixed well; fan capacitor is out of service life.
Disconnect the power cord, check whether the
fan can run smooth by hand or other tools,
whether motor wire is fixed well. For the slow
running speed, you could change a new
capacitor.
Not cooling/heating adequately
Something may block the indoor/outdoor air
outlet.
Make sure that there is no obstacle at the
indoor/outdoor air outlet.
Make sure that the grill is suitable for the unit,
inappropriate grill will cause the compressor
being protected; make sure that the grill has
more than 70% turn over.
Set unsuitable temperature.
Set higher/lower temperature by the control board.
NOTE: temperature setting restriction will restrict
the setting temperature. See the SENIOR
SETTINGS section.
Indoor air filter is dirty.
Should clean the filter every month at least.
Room is hot/cold.
Let unit run a little longer that room temperature
will be lower/higher.
Heat leakage between indoor and outdoor.
Block the leakage place.
Indoor coil not cold/heat.
Charge the refrigerant.
Unit has noise
Some moving parts of the unit get loose
fixing or cause bad vibration.
Something in the air way.
Make sure that all moving parts are assembled
well, and nothing is in the air way.
Bad smell when heating
The dust on the E-heater is heating.
The bad smell will disappear a little later.