Troubleshooting; Error Codes And Description - Daikin FTXS30HVJU Service Manual

Troubleshooting

4. Troubleshooting

4.1

Error Codes and Description

System
Indoor
Unit
Outdoor
Unit

72
Code Indication Description
00
Normal
U0
Insufficient gas
U2
Low-voltage detection or over-voltage detection
U4
Signal transmission error (between indoor and outdoor units)
UA
Unspecified voltage (between indoor and outdoor unit)
A1
Indoor unit PCB abnormality
A5
Freeze-up protection control or high pressure control
A6
Fan motor or related abnormality
C4
Heat exchanger temperature thermistor abnormality
C9
Room temperature thermistor abnormality
E1
Outdoor unit PCB 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
H0
Compressor system sensor abnormality
H6
Position sensor abnormality
H8
CT or related abnormality
H9
Outdoor air thermistor or related abnormality
J3
Discharge pipe temperature thermistor or related abnormality
J6
Heat exchanger temperature thermistor or related abnormality
L3
Electrical box temperature rise
L4
Radiation fin temperature rise
L5
Output overcurrent detection
P4
Heat radiation fin thermistor or related abnormality
U7
Signal transmission error on outdoor unit PCB
: Displayed only when system-down occurs.
SiUS04-924
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Service Diagnosis