Code Indication on the Remote Controller Si12-411A
168 Service Diagnosis
4. Code Indication on the Remote Controller
4.1 Error Codes and Description of Fault
Code Indication Description of Problem
System
00
Normal
U0
Insufficient gas
U2
Low-voltage detection
U4
Signal transmission error (between indoor and outdoor units)
UA
Unspecified voltage (between indoor and outdoor units)
UH
Anti-icing function in other rooms
Indoor
Unit
A1
Indoor unit PCB abnormality
A5
Freeze-up protection function or high pressure control
A6
Fan motor or related abnormality
C4
Heat exchanger temperature thermistor abnormality
C7
Shutter drive motor / shutter limit switch abnormality
C9
Room temperature thermistor abnormality
Outdoor
Unit
E5
OL activation (compressor overloaded)
E6
Compressor lock
E7
DC fan lock
E8
Input over current detection
EA
Four way valve abnormality
F3
Discharge pipe temperature control
H6
Position sensor abnormality
H8
CT or related abnormality
H9
Outdoor air thermistor or related abnormality
J3
Discharge pipe thermistor or related abnormality
J6
Heat exchanger thermistor or related abnormality
J8
Liquid pipe thermistor or related abnormality
J9
Gas pipe thermistor or related abnormality
L3
Electrical box temperature rise
L4
Radiation fin temperature rise
L5
Output over current detection
P4
Radiation fin thermistor or related abnormality
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