Service and Parts Manual (2018, 2019, 2020, 2021, 2022)

85 PB
TROUBLESHOOTING
Basic Troubleshooting
Malfunction Possible Reasons Solution
Start Failure
Unit does not have power; Power line
damaged or power not available.
"Check the indicator LED on the LCID
power head, it should be lit up, if not,
push the RESET button, if still no volt-
age, but power grid has output, you
need to change the power cord."
Power cord protection trip.
Check the power cord for damage,
push the RESET button. If not solved,
replace the power cord.
Power cord isn’t plugged in correctly. Plug in cord correctly.
PCB fuse is broken.
Check if any load (in fan, out fan, re-
versing valve, power transformer) has
a 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 does not work
When the unit is switch edto 24V re-
mote thermostat or 12V smart con-
troller, 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 ADVANCED SETTINGS
section.
Indoor fan/outdoor fan does not func-
tion or runs slowly
Fan is locked by something or the
power wires are poorly connected;
fan capacitor is poorly connected; 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 connected well. If fan has slow
running speed replace capacitor.
Figure 711