BERNSTEIN SCR OM, Manual

Page: 13 / 14

Fault Diagnosis Chart
FC Fault Possible cause What to do
1 Differences between the channels Only one Channel detects an Error Look at the Flash Code of the other channel
2 One of the channels activates One channel faulty Reset system
3
Feedback circuit open Normally closed contacts of external
relays are not connected
Link not wired Check wiring
Check external relays
4 Start button constantly activated Start button faulty
Start switch is used instead of start push
button Check start button on short circuit
Check start button (must be a momentary push
button)
5 Key switch is activated during start up Key switch activated
Key switch defect Reset system
Check key switch
6 Light curtain active on start up Wiring error of the light curtain Check wiring; emitter test signal must activated
with output 63-64.
7
Internal fault of the safety output Wiring error of safety outputs
Noise on the control line
Output faulty Check wiring of safety outputs.
8 Internal fault of emitter control Wiring fault of the light curtain
Noise on control line
Output fault Check wiring of output 63-64.
9 Muting lamp disconnected Muting lamp faulty
Muting lamp is missing
No link on AML terminals Check muting lamp and change if necessary
Insert link between AML terminals
10
Key switch activated twice After the clearance of the light barrier
the key switch was activated a second
time Reset system
11 Light curtain disconnected during start or
time out on receiver Wiring fault for the light curtain
Optical Path is broken
Timeout reached Check wiring
Check optical path
Check technical data of the light barrier (start
time, power consumption)
12 Simultaneousness of muting sensors
exceeded (3s) Wrong position of the muting sensors
Only one muting sensor was activated Check position of muting sensors, the material
must activate both sensors within 3s
all muting sensors wired ?
13 Internal fault of muting lamp control Wiring fault of the muting lamp
Muting lamp defect
PIN 53 is connected to GND
Output fault Check wiring at PIN 53 and ESS+
Check muting lamp
14 Mute Over-ride timeout exceeded Manual muting timeout (10 min)
reached Reset System
15 Internal memory fault Noise on control / Power lines
Internal error Reset; if fault occurs again: check system for
noise
13