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LED 1
LED 2
7797831 - v04 - 07122022
LED 3
Error name
External coil sensor error
External room temperature sensor
error
Indoor and outdoor unit communica
tion error
Main external control panel and
module panel communication error
Outdoor EE error
Outdoor DC fan error
Internal room temperature sensor
error
Internal coil sensor error
Indoor fan error
Refer to tooling display for other er
rors
Compressor cap sensor error
Recirculated sensor error
Compressor overpower protection
Over current protection
Exhaust sensor error
Cooling overload protection
Indoor high temperature heating pro
tection
Indoor cooling freezing protection
Compressor shell temperature pro
tection
OVP or UPV error
Probable Trouble Location
External coil sensor, main external control panel.
External room temperature sensor, main external
control panel.
Connection wire, main internal control panel,
main external control panel, EE reverse connec
tion, module panel.
Connection wire of module and main control da
ta, module panel, main external control panel
Main external control panel
Mechanical jam of external fan, external DC fan,
main external control panel.
Internal room temperature sensor, main internal
control panel.
Internal coil sensor, main internal control panel.
Mechanical jam of fan, internal fan, main internal
control panel.
Entire set of external controller.
System pressure, compressor cap sensor (pro
tection switch), main external control panel.
Recirculated sensor, four-way valve switch error,
main external control panel.
Power voltage, module panel, main external con
trol panel.
Power voltage, system pressure, module panel,
main external control panel.
System pressure, exhaust sensor, main external
control panel.
Condenser, external fan, capillary, external coil
sensor, main external control panel.
Evaporator, internal fan, thin unit connection
pipe, internal coil sensor, main internal control
panel.
Evaporator, internal fan, capillary, internal coil
sensor, main internal control panel.
Same as
Compressor cap sensor er
ror.
Power voltage, reactor, module panel, main ex
ternal control panel.
en
8 Troubleshooting
131
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