Multi Variable Air Conditioners Floor and Ceiling Type Indoor Unit 
20 
7 Table of Error Codes for Indoor Unit 
Error 
Content 
Error 
Content 
Error 
Content 
L0  Indoor Unit Error  LA 
Indoor Units 
Incompatibility Error 
d9  Jumper Cap Error 
L1  Indoor Fan Protection  LH 
Warning 
dA 
Address Error 
L2  E-heater Protection  LC 
ODU-IDU 
Incompatibility Error 
dH 
Wired Controller PCB 
Error 
L3  Water Full Protection  d1  Indoor Unit PCB Error  dC 
Capacity DIP Switch 
Setting Error. 
L4 
Wired Controller Power 
Supply Error 
d3 
Ambient Temperature 
Sensor Error 
dL 
Outlet Air Temperature 
Sensor Error 
L5  Freeze Protection  d4 
Inlet Pipe Temperature 
Sensor Error 
dE 
Indoor Unit CO
2
 
Sensor Error 
L7 
No Master Indoor Unit 
Error 
d6 
Temperature Sensor 
dy 
Water Temperature 
Sensor Error 
L8 
Power Insufficiency 
Protection 
d7  Humidity Sensor Error  C0  Communication Error 
L9 
Control Indoor Units 
d8 
Water Temperature 
Error 
AJ 
Filter Cleaning 
Reminder 
db  Special Code: Field Debugging Code