Page 11
Translation of the original instructions MFS-05
Δp, Filtration Group GmbH, 16.01.18, Mat. No. 70303409, Version 03
12
Normal operation
The green ‘operation’ LED lights up when the unit is
switched on.
The unit is now ready.
Fig. 22: Operation LED
•
The yellow LED lights up if the differential pressure
is > 5% (> approx. 2 mbar) and the valves are
activated.
The controller is active.
13
Troubleshooting
13.1 Test
•
Press the S1 test button in the top right-hand corner of
the controller to switch the valves.
•
A settable differential pressure must be supplied for the
duration of the test.
Alternatively:
•
Test the controller in “time control” mode
(terminals 16-17 and 18-19 jumpered).
13.2 Troubleshooting table
Fault
Possible cause
Remedy
Green
‘operation’
LED not lit
Power supply
faulty
Test the voltage
Fuse F1 defective
Replace the fuse
Yellow
LED not lit
No start signal
Check the differential
pressure
No signal enable
18-19 jumpered
Jumper XS1 set
incorrectly
Check the jumper
settings
Both red
valve
LEDs blink
Valve
potentiometer
inadvertently
altered
Set the potentiometer
correctly
One red
LED blinks
Valve not switched Test the valve cable
Potentiometer set
incorrectly
Potentiometer setting =
no. of valves
Red LED
lit
Valve not activated Test the valve
connection
Acknowledge the fault
Terminal 18 + 21
Red LED
row blinks
Post-cleaning
potentiometer
inadvertently
altered
Set the post-cleaning
potentiometer correctly
