Siemens Pointek CLS300, Instruction Manual, Page: 26 / 32

Page 24 Pointek CLS 300 – INSTRUCTION MANUAL 7ML19985CK03
Troubleshooting
Symptom Observation Action
No alarm response L3 (green LED) off Check power supply
L1 (yellow) doesn’t respond
to reducing level on the
electrode
Check sensitivity, S1-5,
electrode, connections to
sensor input on trip
amplifier (and zener barrier
continuity if used)
Alarm won’t switch
when material level
moves down the
electrode
L1 (yellow) responds to
reducing level on the
electrode
Check that relay and L2
(red LED) changes state
when S1-3 is toggled
L1 (yellow) doesn’t respond
to the sensing electrode
approaching or touching
Check sensitivity S1-5,
electrode, (and zener
barrier continuity, if used)
L1 (yellow) responds to
increasing level on the
electrode
Alarm doesn’t switch
when material level
moves up the electrode
L1 (yellow) flashes when
approaching the alarm trip-
point
Check that relay and L2
(red LED) changes state
when S1-3 is toggled
Maintenance
The Pointek CLS 300 requires no regular maintenance or cleaning. Even with significant build-
up on the CLS 300 level detector electrode, the level switch will continue to operate. Build-up
of material on the active shield area has little or no effect on the performance of the CLS 300.