Daikin FTXS30HVJU - Troubleshooting; Error Codes and Description

Troubleshooting SiUS04-924
72 Service Diagnosis
4. Troubleshooting
4.1 Error Codes and Description
: Displayed only when system-down occurs.
Code Indication Description
Reference
Page
System
00
Normal
—
U0
Insufficient gas
102
U2
Low-voltage detection or over-voltage detection
104
U4
Signal transmission error (between indoor and outdoor units)
79
UA
Unspecified voltage (between indoor and outdoor unit) 80
Indoor
Unit
A1
Indoor unit PCB abnormality
73
A5
Freeze-up protection control or high pressure control
74
A6
Fan motor or related abnormality
76
C4
Heat exchanger temperature thermistor abnormality
78
C9
Room temperature thermistor abnormality
78
Outdoor
Unit
E1
Outdoor unit PCB abnormality
81
E5
OL activation (compressor overload)
82
E6
Compressor lock
83
E7
DC fan lock
84
E8
Input overcurrent detection
85
EA
Four-way valve abnormality
86
F3
Discharge pipe temperature control
88
F6
High pressure control in cooling
89
H0
Compressor system sensor abnormality
90
H6
Position sensor abnormality
91
H8
CT or related abnormality 93
H9
Outdoor air thermistor or related abnormality
95
J3
Discharge pipe temperature thermistor or related abnormality
95
J6
Heat exchanger temperature thermistor or related abnormality
95
L3
Electrical box temperature rise
97
L4
Radiation fin temperature rise
98
L5
Output overcurrent detection
100
P4
Heat radiation fin thermistor or related abnormality
95
U7
Signal transmission error on outdoor unit PCB 105