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Possible Cause Checkout Procedure
Board is in spin mode.
Relief Speed Pot (RSP)
is not set correctly.
(RTP) is not working
Switches on SDC
incorrect
I. Spin Torque Selector not
working
J. Check (RSP) remote speed
(10k) on (SDC) board
K. (RTP) (10K) Remove
3 Remote Torque Wires
red wire to term 2
white wire to term 1.
black wire to term 3.
L. Verify postion of all pots and
switch on SDC
Light next to TQ on SDC board should
be ON. If not remove wires
41SDCMOD and 44SDCCOM from
SDC control board. Machine works.
Yes--Machine was in spin mode.
Check continuity of STS switch.
Replace if bad.
No-- Light next to TQ is ON but
machine does not work, go to step J.
Verify (SPEED) pot setting on the (SDC)
board. Should be set as specified on
pages 24 and 25. Adjust if incorrect and
check Relief Torque function. Works
Yes--end of troubleshooting
No--go to Step K. next
Check for 10,000 ohms
Red wire to white wire
Full CCW--0 ohms
Full CW--10,000 ohms
Red wire to black wire
Full CCW--10,0000 ohms
Full CW--0 ohms
Yes--go to Step L. nest
No--replace (RTP)
Verify postion of 4 pots on board.
Should be set as specified on pages
24 and 25. Verify that the Troque
reduction feature is in the OFF position.
(pushed toward the pots on board).
Motor works
Yes--end of troubleshooting
No--replace SDC.
ELECTRICAL TROUBLESHOOTING (Continued)