Troubleshooting; Error Codes - Daikin FT25CV1A Service Manual

Troubleshooting

4.

Troubleshooting

4.1

Error Codes

System
Indoor
Unit
Outdoor
Unit
86
Code Description
00
Normal
U0#
Insufficient gas
U4
Signal transmission error (between indoor and outdoor units)
A1
Indoor unit PCB abnormality
A5
Freeze-up protection control or high pressure control
A6
Fan motor or related abnormality
C4
Heat exchanger thermistor abnormality
C9
Room temperature thermistor abnormality
∗
Indoor unit PCB abnormality
E5#
OL activation (compressor overload)
E6#
Compressor lock
E8
Input over current detection
EA
Four way valve abnormality
F6
High pressure control in cooling
H8
CT or related abnormality
H9
Outdoor air thermistor or related abnormality
J6
Heat exchanger 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
#
: Displayed only when system-down occurs.
Reference
AC motor
DC motor
Service Diagnosis
Si01-406
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