Error Codes: Hydro-box
ESIE13-02
Part 4 – Troubleshooting
100
3
1
4
5
3.5
“C0”
Hydro-box: Flow Sensor Failure
Remote controller
display
C0
Method of
malfunction
detection
The protection device circuit checks the flow input signal during pump stop operation.
Malfunction
decision conditions
The error is generated in case flow input signal during pump stop operation occurs.
Supposed causes
Malfunction of the flow sensor
Water flow caused by external source
Troubleshooting
[1]: Do not disconnect the connector of the flow sensor on the PCB (X4A). Measure the voltage value
on the connector of the flow sensor between pin 2 and 3.
Check the installation conditions
Is there an external pump installed
in the water circuit of the hydro-box
Replace flow sensor
Yes
No
Remove the external pump or separate the external pump
hydraulically from the hydro-box via a balance vessel.
No
Replace hydro-box PCB.
Yes
Check on connector if
pin 2-3 > 0,6V
