MASTERFLEX L/S Variable-Speed Modular Drives Operating Manual 4-1
Masterflex
Symptom
Cause
Remedy
Section 4
Troubleshooting
Troubleshooting Chart
Motor does not rotate,
when switched to FWD
or REV. POWER indicator
does not glow.
Motor does not rotate,
when switched to FWD
or REV. Power indicator
glows. Speed control
setting is greater than 0.
Defective line cord or fuse.
Defective Motor or Controller.
1. Check that unit is plugged into
a live line.
2. On 115V and 230V unit, check
line cord for continuity and
replace if defective.
3. On 230V units only, check fuse
and replace if defective.
4 On 115V units, return for
servicing.
1. Place the FWD-OFF-REV switch
in the OFF position.
2. Test motor and controller:
a) Check the drive motor cable
connector on the rear of the
controller and insert the
connector fully into the
controller receptacle.
b) Replace motor, with similar
unit. Reconnect the drive
motor cable connector on
the rear of the controller.
Retest.
c) Replace controller with
similar unit. Reconnect
the drive motor cable to
connector on the rear of
the controller. Retest.
