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Troubleshooting
SiUS091601E
69
Service Diagnosis
4. Troubleshooting
4.1
Error Codes and Description
: Displayed only when system-down occurs.
Error Codes
Description
Reference
Page
System
00
Normal
—
U2
Low-voltage detection or over-voltage detection
76
U4
Signal transmission error (between indoor unit and outdoor unit)
78
UA
Unspecified voltage (between indoor unit and outdoor unit)
80
Indoor
Unit
A1
Indoor unit PCB abnormality
70
A5
Freeze-up protection control / heating peak-cut control
71
A6
Fan motor (DC motor) or related abnormality
72
C4
Indoor heat exchanger thermistor or related abnormality
75
C9
Room temperature thermistor or related abnormality
75
Outdoor
Unit
E1
Outdoor unit PCB abnormality
81
E5
OL activation (compressor overload)
82
E6
Compressor lock
84
E7
DC fan lock
85
E8
Input overcurrent detection
86
EA
Four way valve abnormality
87
F3
Discharge pipe temperature control
89
F6
High pressure control in cooling
90
H0
Compressor system sensor abnormality
92
H6
Position sensor abnormality
93
H9
Outdoor temperature thermistor or related abnormality
95
J3
Discharge pipe thermistor or related abnormality
95
J6
Outdoor heat exchanger thermistor or related abnormality
95
L3
Electrical box temperature rise
97
L4
Radiation fin temperature rise
98
L5
Output overcurrent detection
99
P4
Radiation fin thermistor or related abnormality
95
Содержание FTX09NMVJU
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