Danfoss mcd-500 Operating Instruction page 94

11 Bus Bar Adjustment Procedure
(MCD5-0360C - MCD5-1600C)
NB!
Remove the main plastic slowly to avoid damaging the keypad wiring loom which runs between the main plastic and the backplane
PCB.
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1. Remove all wiring and links from the soft starter before dismantling the unit.
2. Remove the unit cover (4 screws).
3. Unscrew the main plastic and fold away from the starter (4 screws).
4. Unplug the keypad loom from CON 1 (see note).
5. label each SCR firing loom with the number of the corresponding terminal on the main
control PCB, then unplug the looms.
6. Unplug the thermistor, fan and CT wires from the main control PCB.
1. Unscrew and remove the magnetic bypass plates (models MCD5-0620C to MCD5-1600c
ONLY).
2. Remove the CT assembly (three screws).
3. Identify which bus bars are to be moved. Remove the bolts holding these bus bars in
place then slide the bus bars out through the bottom of the starter (four bolts per bus
bar).
1. Slide the bus bars in through the top of the starter. For input bus bars, the short curved
end should be outside the starter. For output bus bars, the unthreaded hole should be
outside the starter.
2. Replace the dome washers with the flat face towards the bus bar, then tighten the bolts
holding the bus bars in place to 20 Nm.
3. Place the CT assembly over the input bus bars and screw the assembly to the body of
the starter (see note).
4. Run all wiring to the side of the starter and secure with cable ties.
MG.17.K2.02 - VLT ® is a registered Danfoss trademark
MCD 500 Operating Instruction