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8-2 Display error code of outdoor unit's indicator lights
Display by the 3 LED indicator lights on the PCB of the outdoor unit:
○ for off; ● for on; ★ for flashing.
Probable Trouble Location
Normal (outdoor
unit standby)
Normal, all three lights off for standby
status.
Normal
(compressor
running)
Normal, all three lights flash while
compressor running.
Forced service
(test mode)
Power voltage, compressor cable, reactor,
module panel, Outdoor Unit main PCB,
compressor.
Power voltage, reactor, module panel,
Outdoor Unit main PCB.
Compressor
out-of-step error
Power voltage, compressor cable, module
panel, Outdoor Unit main PCB,
compressor.
System pressure, exhaust air sensor,
Outdoor Unit main PCB.
Outdoor Unit coil
sensor error
Outdoor Unit coil sensor, Outdoor Unit
main PCB.
Outdoor Unit
room temperature
sensor error
Outdoor Unit room temperature sensor,
Outdoor Unit main PCB.
Indoor and
outdoor unit
communication
error
Connection wire, Indoor Unit main PCB,
Outdoor Unit main PCB, EE reverse
connection, module panel.
Outdoor Unit
main PCB and
module panel
communication
error
Connection wire of module and main
control data, module panel, Outdoor Unit
main PCB
Mechanical jam of Outdoor Unit motor,
Outdoor Unit DC motor, Outdoor Unit
main PCB.
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