DC Inverter Multi VRF System
28
7 Error Indication
Inquiry method of error indication: combine division symbol and content symbol to check the
corresponding error.
Indoor:
Error
Code
Content
Error
Code
Content
Malfunction of IDU (uniform)
L1 Protection of indoor fan d2
Malfunction of lower water temperature sensor
of water tank
Auxiliary heating protection
Malfunction of ambient temperature sensor
Malfunction of entry-tube temperature sensor
Abnormal power supply for wired controller
Malfunction of middle temperature sensor
Freeze prevention protection
Malfunction of exit-tube temperature sensor
Malfunction of humidity sensor
Malfunction of water temperature sensor
L8 Power supply is insufficient d9 Malfunction of jumper cap
L9
For single control over multiple units, number of
IDU is inconsistent
dA Web address of IDU is abnormal
LA
For single control over multiple units, IDU series is
inconsistent
dH PCB of wired controller is abnormal
Alarm due to bad air quality
Abnormal setting for capacity button
IDU is not matching with outdoor unit
Malfunction of air outlet temperature sensor
Malfunction of water flow switch
Malfunction of indoor CO
2
sensor
LE Rotation speed of EC DC water pump is abnormal dF
Malfunction of upper water temperature sensor
of water tank
Malfunction of shunt valve setting
Malfunction of backwater temperature sensor
LJ Setting of functional DIP switch code is wrong dP
Malfunction of inlet tube temperature sensor of
generator
LP Zero-crossing malfunction of PG motor dU
Malfunction of drainage pipe temperature sensor
of generator
LU
Indoor unit’s branch is not inconsistent for
one-to-more unit of heat recovery system
db Debugging status
Lb
Inconsistent IDU of group-controlled reheat and
dehumidification system
dd
Malfunction of solar power temperature sensor
Malfunction of inlet tube temperature sensor 2
Malfunction of swing parts
Malfunction of outlet tube temperature sensor 2
Malfunction of water temperature sensor
Malfunction of fresh air intake temperature sensor
Main error of indoor air box sensor
yA
IFD malfunction
— —
Outdoor:
Error
Code
Content
Error
Code
Content
F0 Main board of ODU is poor E0 Malfunction of ODU (uniform)
F1 Malfunction of high-pressure sensor E1 High-pressure protection
F3 Malfunction of low-pressure sensor E2 Discharge low-temperature protection
F5
Malfunction of discharge temperature sensor of
compressor 1
E3 Low-pressure protection
F6 Malfunction of exit-tube temperature sensor E4
High discharge temperature protection of
compressor
Malfunction of humidity sensor
Drive module low temperature protection
Malfunction of water temperature sensor
Protection for other modules
Malfunction of jumper cap
Over-current protection of compressor 1
Web address of IDU is abnormal
Over-current protection of compressor 2
Current sensor of compressor 2 is abnormal
Over-current protection of compressor 3
Current sensor of compressor 3 is abnormal
Over-current protection of compressor 4
Current sensor of compressor 4 is abnormal
Over-current protection of compressor 5
Current sensor of compressor 5 is abnormal
Over-current protection for compressor 6
Current sensor of compressor 6 is abnormal
Gas-mixing protection of 4-way valve
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