Troubleshooting; Troubleshooting And Alarm States - Pepperl+Fuchs NVD-111 Manual

Warning Device NVD-111

Troubleshooting

6 Troubleshooting
6.1

Troubleshooting and Alarm States

Note!
If switched on ("Acoustic alarm" DIP switch) an acoustic signal sounds in the
event of an alarm and sensor malfunction.
LED indication
All LEDs are off.
"SUPPLY" LED lights up.
n
"SYSTEM OK" LED lights
n
up.
"SUPPLY" LED lights up.
n
"SYSTEM OK" LED
n
flashing.
"SUPPLY" LED lights up.
n
"OVERFLOW ALARM"
n
LED lights up.
"SUPPLY" LED lights up.
n
"OVERFLOW ALARM"
n
LED flashing.
"SUPPLY" LED lights up.
n
"FAT LAYER ALARM"
n
LED lights up.
"SUPPLY" LED lights up.
n
"FAT LAYER ALARM"
n
LED flashing.
Cause
The warning device is
not functioning.
No alarm at present. The warning system is operating normally.
No alarm at present. An
alarm occurred in the
past.
Excessive liquid level
Sensor fault or lead
breakage
Maximum fat layer
thickness is reached.
Sensor fault or lead
breakage
Action
Check that the supply voltage is connected.
1. Check the status of the separator.
2. Press the "ALARM RESET" button.
It is essential to check the separator status. If
necessary, takes measures to stop the alarm
situation. The alarm situation can arise from a
faulty or blocked drain.
Check sensor and sensor installation and
replace the overflow sensor, if necessary.
It is essential to check the separator status.
Empty (disposal) the grease interceptor, if
necessary.
Check sensor and sensor installation and
replace the fat level sensor, if necessary.
EN
EN - 35