Leuze electronic CML 720i Ex - Troubleshooting; Diagnosing Failures and LED Indicators

Troubleshooting
Leuze electronic CML 720i Ex 118
13 Troubleshooting
13.1 What to do in case of failure?
After switching on the light curtain, display elements (see chapter 3.4) assist in checking the proper func-
tion and troubleshooting.
In case of error, you can determine the error from the LED displays. With the error message you can deter-
mine the cause of the error and initiate measures to rectify it.
13.2 Operating indicators of the LEDs
Table 13.1: Receiver LED displays - state and causes
NOTICE
If the light curtain responds with an error display, you will often be able to eliminate the cause yourself!
 Switch off the system and leave it switched off.
 Analyze and eliminate the cause of the fault using the following table.
 If you are unable to rectify the fault, contact the Leuze electronic branch responsible for you or call the
Leuze electronic customer service (see chapter 15 "Service and support").
LED green LED yellow State Possible cause
ON
(continuous
light)
- Sensor ready
OFF OFF Sensor not ready Interruption of the operating voltage;
Light curtain in start-up phase
OFF Flashing
(15 Hz)
Missing function reserve Soiling of the lens covers
Misalignment of transmitter or
receiver
Operating range exceeded
Flashing synchronously
(3 Hz)
Teach running
Flashing synchronously
(9 Hz)
Teach error Soiling of the lens covers
Operating range exceeded
Flashing alternately (9 Hz) System error No connection between transmitter
and receiver
Operating voltage too low
Receiver is not compatible with the
transmitter