C0" Hydro-Box: Flow Sensor Failure - Daikin ESIE13-02 Service Manual

Error Codes: Hydro-box

"C0" Hydro-box: Flow Sensor Failure

3.5
1
Remote controller
display
Method of
malfunction
detection
Malfunction
decision conditions
3
Supposed causes
Troubleshooting
4
5
Part 4 – Troubleshooting
C0
The protection device circuit checks the flow input signal during pump stop operation.
The error is generated in case flow input signal during pump stop operation occurs.
Malfunction of the flow sensor

Water flow caused by external source

Check the installation conditions
Is there an external pump installed
in the water circuit of the hydro-box
No
Check on connector if
pin 2-3 > 0,6V
Yes
Replace flow sensor
[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.
Remove the external pump or separate the external pump
Yes
hydraulically from the hydro-box via a balance vessel.
No Replace hydro-box PCB.
100
ESIE13-02