Daikin FCQ35B7V1 Service Manual page 188

Troubleshooting
1.7 Overview of Error Codes
1
Malfunction Code
A1
A3
A6
AF
AJ
C4
C5
C9
3 3
CC
CJ
U4/UF
U5
4
U8
UA
UC
5
Notes:
3–26
Contents/Processing
Failure of PC board ass'y for indoor unit
Malfunction of drain water level system
Indoor unit fan motor overload / overcurrent / lock (Note 1)
Abnormal drain water level
Failure of capacity setting
Malfunction of heat exchanger temperature
sensor system
Malfunction of gas piping temperature sensor
system
Malfunction of suction air temperature sensor
system
Malfunction of humidity sensor system
Malfunction of remote control air temperature
sensor system
Failure of transmission (between indoor and
outdoor unit)
Failure of transmission (between indoor unit and
remote controller)
Failure of transmission (between "main" and
"sub" remote controller
Failure of fieldsetting
Address error of central remote controller
In the case of the shaded error codes, "inspection" is not displayed. The system operates, but be
sure to inspect and repair it.
1 There is a possibility of open phase power supply, check power supply also.
2 Operation when a malfunction occurs may differ according to the model.
Remarks
Activation of float switch during compressor off.
Either capacity data is set incorrectly, or capacity
has not been set for the data IC
FCQ-D only.
Failure of remote controller air thermistor.
Unit can be operated by indoor unit thermistor.
Transmission between indoor and outdoor unit is
not being correctly carried out. (Note 1, Note 2)
Transmission between indoor and remote
controller is not being correctly carried out.
Transmission between "main" and "sub" remote
controller is not being correctly carried out.
System fieldsetting error pair, twin, triple, double
twin or wrong capacity class.
Part 3 – Troubleshooting
ESIE05-04