Faults

TACOCONTROL Z1 S

Fault description

Cause

Remedy

Personnel

Flow rate is not measured,

although fresh water is

flowing.

Flow sensor for

fresh water is dirty

or defective.

Clean or replace the flow sensor.

Electrician

Circuit board defec-

tive.

Replace the circuit board (

Ä Chapter

9.4.2 ‘Replacing the circuit board’

on page 35).

Electrician

Wiring faulty.

Check the wiring and replace it, if

necessary.

Electrician

9.4 Work required for repairing faults

9.4.1 Work required for repairing faults on the heat interface unit

When performing work required to repair faults

affecting the heat interface unit, observe the

operating instructions for the heat interface unit

(

Ä Chapter 1.2 ‘Other applicable documents’

on page 5).

9.4.2 Replacing the circuit board

Personnel:

n Electrician

1.

Save the set parameters externally (service personnel only).

2.

Disconnect the connector from the socket.

3.

Unplug the LAN cable and USB cable.

4.

Remove the screws in the controller box to open the controller

box.

5.

Unplug the terminal plugs from the terminal strips on the circuit

board.

6.

Remove the circuit board.

7.

Insert a new circuit board and click it into place.

8.

Plug the terminal plugs into the terminal strips on the circuit

board.

9.

Close the controller box and screw it together.

10. Connect the HMI to the controller ( Ä Chapter 6.1 ‘Connecting

the HMI’ on page 24).

11. Connect the connector to the socket.

12. Reset the parameters (

Ä Chapter 6.2.1 ‘Setting parameters on

the HMI’ on page 24) or load them using a USB stick (service

personnel only).

05/2024 Item no. 215251 EA no. EA-1291

Operating instructions

35