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t
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ms elektronik
WRM-4
6. Checklist for troubleshooting and error correction
Warning:
If you notice a strong heat development, immediately disconnect the connection to the
supply voltage.
Fire hazard!
Possible causes:
One or more connections are faulty.
à
Check the connections.
"Kit" version: one or more components are soldered incorrectly.
à
Carry out a visual
inspection (
à
section 3.5.) and eliminate the faults, if necessary.
The turnout detector is defective.
à
Send the detector in for inspection.
The lamps or LEDs connected to the detector do not light.
Possible causes:
The voltage supply is interrupted.
Check the connection to the voltage supply.
LEDs are connected inncorrectly polarised
Check the connections.
The lamps or LEDs are defective.
Check the lamps by connecting them directly to the
voltage supply.
The diode D17 is soldered in the wrong way around.
Alter the mounting direction.
Both lamps for one point light permanently.
Possible cause:
The turnouts have not switched properly and have stopped midway.
à
Check the position
of the turnouts.
There is no change over from the one to the other lamp or LED after switching the
turnout.
Possible cause:
The turnout is not properly connected to the turnout detector.
à
Check the three
connections to the turnout.
A connected relay "rattles" (does not switch properly).
Possible cause:
This phenomenon occurs when supplying the WRM-4 with a.c. voltage.
à
Solder a
capacitor in parallel to the relay (> 100 µF / 25 V). Also note the information in section 5.3.
Checklist for troubleshooting and error correction | 21