Delta Tau 3Ax-602646-xUxx manual Quad Amp Hardware Reference Manual

Quad Amp Hardware Reference Manual

Motor moves after a

Verify if the bus voltage sags when

Call Delta Tau for an RMA.

command is issued but

the motor is commanded to move.

under voltage fault

The Main IGBT probably does not

comes on shortly after.

turn on. Check if the wiring between

Also, the Soft Start

E1 and G1 (of Main IGBT) and J4-5, -

resistor heats up (and

6 (Soft Start board) is okay. Then

possibly burns).

verify if G1 with respect to E1

switches from approx. –10 VDC to

+15 VDC after the Main power is

turned on. If it does, the Main IGBT

is probably open. If it does not, the

problem is most likely with the Soft

Start board.

Under voltage fault

Check if there is bus voltage across

If not, examine if the 10-pin flat cable between

stays displayed even

15k Ohm bleed resistor.

the Soft Start and the I/O Logic board is

after several enable

connected on both sides and in good shape.

commands.

32

Troubleshooting