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Busbar over voltage protection P0
Phase current detection fault P0
Busbar under voltage protection P0
Capacitor charge error P0
Demagnetization protection P0
Communication error between indoor and
outdoor units, indoor unit’s wired controller
C0
485 communication error between main
controller and drive controller
C2
Fan motor error H0
PFC over current protection E0
PFC module overheat P0
Phase loss protection of compressor P0
Malfunction of lack of IDU C4
1.3 Operation Code
Operation Indoor Unit Display
Trail run A0
Fluorine recycle A2
Defrosting A3
Oil return -
Testing online A3
Vacuumization A8
Test module -
2 Troubleshooting
Troubleshooting principle
(1) Communication malfunction
communication
malfunction
check whether indoor
unit and outdoor unit is
power supplied
Energize indoor unit
and outdoor unit
repiace
communication
wire
measure whether the
communication wire
is in normal
for North America
Photovoltaic Direct-driven VRF
61
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