Instructions pH FUN V1
Page 27 of 28
10
Service
10.1 Connections in the controller housing
The following figure shows the individual connections on the controller board.
Figure: Controller board
Group
Function
Individual connections
Mains voltage range 230V
1
L
2
N
1, 2, 3
230VAC connector for the power supply of the
pH FUN as well as integrated dosing pump.
3
PE
4
N
5
PE
4, 5, 6
Dosing output pH- / pH+ to the connector of the integrated
dosing pump.
6
L (dosing output pH)
Low-voltage/signal range
7
Flow input (GND)
7, 8
Flow input to the connector of the flow switch
8
Flow input (signal)
9
Level input (GND)
9, 10
Level input to the connector of the level sensor
10
Level input (signal)
11
pH input (signal)
11, 12
pH input to the connector of the pH electrode
12
pH input (GND)
10.2 Replacing the fuses
There are 2 fuses on the circuit board:
No.
Fuse of
Fuse
F1
Power supply pH FUN
2 A T (20 mm, slow-blow)
F2
Power supply dosing pump
1 A T (20 mm, slow-blow)
Important:
Replacing the fuses is an intervention in the system and may only be done by trained technicians
(electrician) exclusively.
Replacing the fuse alone is not sufficient. The cause for the failure of the fuse must be located
and corrected. This is the only way to ensure a proper operation!
Important information, danger due to electrical voltage:
Disconnect the device from the mains before starting the work and leave it disconnected until
after the work has been completed. Ensure that the power connection cannot be inadvertently re-
established during the work.
F1
F2