LTC Repair Lombardini Engine Troubleshooting - Wacker Neuson

Electrical Troubleshooting Procedures LTC Repair
6.26 Checking Wiring to/from Ballast Transformers
See Graphic: wc_gr003528
WARNING
Electric shock hazard. Only qualified personnel should conduct this
test.
To check the wiring to and from the ballast transformer(s):
6.26.1 Turn off the engine.
6.26.2 Remove the control panel front cover.
6.26.3 Remove the screws (a) that secure the control panel/cover of the
ballast box (b). Position the control panel/cover of the ballast box so
you can access the wiring to the ballast transformers.
6.26.4 Check the B/Y (black-yellow) wire(s) (c) that run from the circuit
breaker(s) to the ballast transformer(s). Repair the wiring as needed.
6.26.5 Check the R (red) wire(s) (d) that run from the ballast transformer(s) to
the ballast capacitor(s). Repair the wiring as needed.
6.26.6 Check the Y (yellow) wire(s) (e) labelled “COMMON” that run from the
ballast transformer(s) to the neutral of the long terminal strip. Repair
the wiring as needed.
6.26.7 If all wiring is OK and 400V±10% is not reaching the ballast capacitor,
the ballast transformer has failed; replace it.
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