Malfunction Codes Of Idu - Lennox VEMD007N432U Installation Manual

Multi Variable Air Conditioners Duct Type Indoor Unit

8 Malfunction Codes of IDU

Error
Content
Code
L0 Indoor Unit Error
L1 Indoor Fan Protection
L2 E-heater Protection
L3 Water Full Protection
Wired Controller Power
L4
Supply Error
L5 Anti-freezing Protection
L7 No Master Indoor Unit Error
Power Insufficiency
L8
Protection
o1 Over low voltage of IDU bus
o4 IDU startup failure
IDU non-synchronism
o7
protection
Over high temperature of IDU
oA
module
o0 Other drive error
Error
Content
Code
Quantity Of Group Control
L9
Indoor Units Setting Error
Indoor Units Incompatibility
LA
Error
LH Low Air Quality Warning
Outdoor-Indoor
LC
Incompatibility Error
Indoor Unit Circuit Board
d1
Error
Ambient Temperature
d3
Sensor Error
Inlet Pipe Temperature
d4
Sensor Error
Outlet Pipe Temperature
d6
Sensor Error
o2 Over high voltage of IDU bus
o5 IDU overcurrent protection
IDU drive communication
o8
error
Temperature sensor error of
ob
IDU module
Special Code:
db
Field Debugging Code
25
Error
Content
Code
d7 Humidity Sensor Error
Water Temperature Sensor
d8
Error
d9 Jumper Cap Error
Indoor Unit
dA
Hardware Address Error
Wired Controller Circuit Board
dH
Error
Capacity DIP Switch Setting
dC
Error
Outlet Air Temperature
dL
Sensor Error
Indoor Unit CO Sensor
2
dE
Error
o3 IDU IPM module protection
IDU current detecting circuit
o6
error
Communication error of IDU
o9
master controller
oC IDU charging circuit error
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