Specifications

SiEN04-306D Troubleshooting
Service Diagnosis 107
4. Troubleshooting
4.1 Error Codes and Description
H: Displayed only when system-down occurs.
Code Indication Description
Referenc
e
Page
System
00
Normal
—
U0H
Insufficient gas
136
U2
Low-voltage detection
138
U4
Signal transmission error (between indoor and outdoor units)
114
Indoor
Unit
A1
Indoor unit PCB abnormality
108
A5
Freeze-up protection control or high pressure control
109
A6
Fan motor or related abnormality
111
C4
Heat exchanger thermistor abnormality
113
C9
Room temperature thermistor abnormality
113
Outdoor
Unit
E5H
OL activation (compressor overload)
115
E6H
Compressor lock
116
E7
DC fan lock
117
E8
Input over current detection
118
EA
Four way valve abnormality
120
F3
Discharge pipe temperature control
122
F6
High pressure control in cooling
123
H6
Position sensor abnormality
125
H8
CT or related abnormality
126
H9
Outdoor air thermistor or related abnormality
128
J3
Discharge pipe thermistor or related abnormality
128
J6
Heat exchanger thermistor or related abnormality
128
L3
Electrical box temperature rise
130
L4
Radiation fin temperature rise
132
L5
Output over current detection
134
P4
Radiation fin thermistor or related abnormality
128