Daikin EHYHBH05AAV3 Service Manual page 78

Troubleshooting
Malfunction code
1
U0
U0
U0
U2
U3
U4/UF
UF
3
U5
UA
Legend
4
5
Note
Part 4 – Troubleshooting
Contents/Processing
Lack of gas malfunction
Abnormal power supply voltage
Underfloor heating screed dry-out error
Failure of transmission (between hydro-box and outdoor
unit)
Failure of transmission (between hydro-box and outdoor
unit)
or
Gas shortage
Failure of transmission (between hydro-box and remote
controller)
Incorrect hydro-box connected to the system
or unit type connection not confirmed
Colour Meaning
Error code displays automatically and system stops.
Inspect and repair it.
In case of shaded error codes, ‘inspection’ is not displayed. The system operates
but be sure to inspect and repair it.
Error code displayed on user interface.
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.
Abnormal suction pipe temperature
Including malfunction of K10R, K11R
Can only be reset when in installer level
Transmission between hydro-box and outdoor
unit is not being carried out correctly.
Transmission between hydro-box and outdoor
unit is not being carried out correctly.
or
There is very little or no refrigerant flow within
the hydro-box.
Transmission between hydro-box and remote
controller is not being carried out correctly.
In case of spare part PCB.
78
ESIE13-02A
Remarks
(1)