PROBLEM II. Foot switch fails to raise or lower the chair.
1. Bent or broken
1. Visual inspection.
1. Replace foot switch.
2. Broken chain.
2. Visual inspection.
2. Replace broken
3. Sheared pin on
3. Visual inspection.
3. Replace motor.
4. Faulty foot switch
4a. Remove foot switch from
or wiring harness.
4b. Replace wiring
reading of 115v or 220v as
applicable between terminal 2 and
neutral line. If there is no reading,
the wiring harness is faulty.
4c. If there is a reading in 4b above, 4c. Replace foot switch.
check for a reading of 115v or 220v
as applicable between terminal 3 and
neutral line when left side of foot
switch is depressed; between
terminal 1 and neutral when right
side of switch is depressed. If there
is no reading, the switch is faulty.
4d. Replace motor.
4d. If there is a reading on both
switch legs, the motor is faulty.