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33
Does Handwheel
shudder about
one position?
Is the “TEMP °F”
LED lit?
Is the “STALL”
LED lit?
Is the “TEMP °F”
LED still lit?
Is binding or an
obstruction
present?
Clear
obstruction
Move Handswitch
to CW/CCW per
direction drive does
not move
Check SLM for damage;
rebuild or replace
as necessary.
Check linkage and
driven element
Replace
Handswitch,
see p. 77
Is the “FB OPEN”
LED lit?
Does the voltage
across terminals
B–U/B–V = line
voltage?
Is green/red wire
connected to NC
switch contact?
Is the “STOP/LIMIT”
LED lit?
Does voltage from
CW/CCW switch
green/red to term.
B = line voltage?
Does Handwheel
turn freely without
repositioning drive?
Does drive respond
correctly and is
“STALL” LED out?
Does drive respond
correctly and is
“STALL” LED out?
Is binding or
an obstruction
present?
Place Handswitch in
“STOP” - check
linkage and driven
element
Clear
obstruction
Place Handswitch
in “AUTO”-modulate
control signal
both ways
Replace
limit switch,
see p. 76
Connect
wire
properly
Apply correct
loop
resistance
Replace the
DCM
Replace the
DCM
Confirm
proper operation
of drive
Replace
the
DCM
Replace
the
DCM
Confirm
proper operation
of drive
Consult
Factory
Consult
Factory
Consult
Factory
Consult
Factory
YES
YES YES
YES
YES YES YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
YES
YES
YES
YES
NO
NO
NO
NO NO
NO
NO
NO
NO
NO
NO NO
NO NO
NO
Is a feedback loop
of 800 ohms or less
connected to the
terminal board?
Is the “FB OPEN”
LED still on?
Is the Handswitch
in “AUTO”?
Is the “STAT”
LED still on?
Is the “STAT”
LED still on?
Restore ambient
temperature to
drive’s rated range
Cycle drive
power
off and on
Place drive
in “AUTO”
Check limit switch
wiring & setting,
see p. 26
Note: Choose
the side of the slash
corresponding with the
direction of travel in which
the drive is not working;
i.e., CW/CCW or
green/red