Troubleshooting - Split Type Indoor Unit Si18-201
230 Service Diagnosis
1.3 Code Indication on the Remote Controller
1.3.1 Error Codes and Description of Fault
Code
Indication
Description of Problem
System
00
Normal
U0
Insufficient gas
U2
Power factor module abnormality
U4
Signal transmission error (between indoor and outdoor units)
U5
Signal transmission error (between indoor unit and remote controller)
Indoor Unit
A1
Faulty indoor unit PCB
A3
Faulty drainage
A5
Operation halt due to the freeze protection function or high pressure
control
A6
Fan motor or related abnormality
C4
or
C5
Heat exchanger temperature thermistor abnormality
C9
Room temperature thermistor abnormality
CA
Discharge air temperature thermistor abnormality
Outdoor Unit
E5
OL activation (IT activation) or High discharge pipe temperature
E6
Compressor startup error
F3
Operation halt due to discharge pipe control function
H8
CT or related abnormality
H9
Outside air thermistor or related abnormality
J3
Discharge pipe temperature thermistor or related abnormality
J6
Heat exchanger temperature thermistor or related abnormality
J9
Gas pipe temperature thermistor or related abnormality
L4
Radiation fin temperature rise
P3
Heat radiation fin thermistor or related abnormality
P4
Heat radiation fin thermistor or related abnormality
E0
Protectors Function
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