Troubleshooting; Error Codes And Description - Daikin FTXS09HVJU Service Manual

SiUS04-904

4. Troubleshooting

4.1

Error Codes and Description

System
Indoor
Unit
Outdoor
Unit

98
Code
Description
Indication
00
Normal
U0
Refrigerant shortage
Over-voltage detection
U2
Low-voltage detection
U4
Signal transmission error (between indoor and outdoor unit)
A1
Indoor unit PCB abnormality
Freeze-up protection control or high pressure
A5
control
A6
Fan motor or related abnormality
Heat exchanger temperature thermistor
C4
abnormality
C9
Room temperature thermistor abnormality
E5
OL activation (compressor overload)
E6
Compressor lock
E7
DC fan lock
E8
Input overcurrent detection
EA
Four-way valve abnormality
F3
Discharge pipe temperature control
F6
High pressure control in cooling
H6
Position sensor abnormality
DC voltage/current sensor abnormality
H8
CT or related abnormality
H9
Outdoor air thermistor or related abnormality
J3
Discharge pipe temperature thermistor or related abnormality
Heat exchanger temperature thermistor or related
J6
abnormality
L3
Electrical box temperature rise
L4
Radiation fin temperature rise
L5
Output overcurrent detection
P4
Heat radiation fin thermistor or related abnormality
: Displayed only when system-down occurs.

Troubleshooting

Reference Page
09/12 15/18/24
Class
—
138
142
—
106
99
100
AC Motor 102
DC Motor —
105
105
108
109
111
112
115
119
121
123
125
—
128
128
128
130
132
134
128
Service Diagnosis
Class
—
140
—
143
106
99
100
—
103
105
105
108
110
111
113
117
120
121
124
—
126
128
128
128
130
132
136
128