Troubleshooting
ESIE13-02
Part 4 – Troubleshooting
78
3
1
4
5
Legend
Note
(1)
There is a possibility of open phase power supply, check power supply also.
Syst
em
malf
unc
tion
s
U0
Lack of gas malfunction
U0
Abnormal suction pipe temperature
U0
U2
Abnormal power supply voltage
Including malfunction of K10R, K11R
U3
Underfloor heating screed dry-out error
Can only be reset when in installer level
U4/UF
Failure of transmission (between hydro-box and outdoor
unit)
Transmission between hydro-box and outdoor
unit is not being carried out correctly.
(1)
UF
Failure of transmission (between hydro-box and outdoor
unit)
or
Gas shortage
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.
U5
Failure of transmission (between hydro-box and remote
controller)
Transmission between hydro-box and remote
controller is not being carried out correctly.
UA
Incorrect hydro-box connected to the system
or
unit type connection not confirmed
In case of spare part PCB.
Malfunction code
Contents/Processing
Remarks
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.
