Checklist For Troubleshooting And Error Correction - tams elektronik WRM-4 Manual

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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
WRM-4