Daikin ESIE13-02, Service Manual

Page: 97 / 170

ESIE13-02 Error Codes: Hydro-box
97 Part 4 – Troubleshooting
4
3
4
5
4
3.4
“7H”
Hydro-box: Flow Error
User interface
display
7H
Method of
malfunction
detection The malfunction is detected by the flow sensor.
Malfunction
decision conditions The error is generated in case the water flow is too low or no water flow at all for 15 seconds.
Supposed causes

Closed shut off valve

Air in the system

Clogged water filter

Insufficient water pressure

Too high external static pressure (pump speed setting)

Malfunction of hydro-box pump

Hydro-box pump fuse open [FU2]

During defrost

Malfunction of the backup heater [Q1L]

Backup heater fuse [F1B]

In case of EKSWW(U) / EKHWS(U) / EKHWE

Malfunction of the 3-way valve

In case of the EKSWWU / EKHWSU

Malfunction of the tank thermostat [Q1T, Q3L]

Malfunction of 2-way valve

Malfunction of flow sensor (damaged membrane)

7H-01 waterflow problem