PROBLEM III. Lift motor hums when foot switch is used to raise or lower the
chair, or when the automatic switch is used to lower the chair.
PROBABLE CAUSE
TESTING PROCEDURE
CORRECTIVE ACTION
1. Motor or
1. Audible test.
1. Replace motor and/or
capacitor is faulty.
capacitor.
PROBLEM IV. Automatic control fails to operate (manual controls are operating.
TESTING PROCEDURE
CORRECTIVE ACTION
PROBABLE CAUSE
1. Test
1. Test AUTO/MANUAL mode
1. Remove and replace
AUTO/MANUAL
switch as in I. 12b-d above.
the AUTO/MANUAL
mode switch is
mode switch.
faulty.
NOTE: If corrective
action cannot be
accomplished
immediately, place
junction box toggle
switch in manual
position until
corrective action
can be
accomplished.
PROBLEM V. Chair or lift travels beyond exit position.
TESTING PROCEDURE
CORRECTIVE ACTION
PROBABLE CAUSE
1. Limit switch is
1. Visual inspection.
1. Remove and replace
faulty.
lift motor.
MD0371
A-6