Checking The Magnetic Brake; Checking The Freewheel Switch - Invacare Twister Service Manual

Twister / Twister Junior

16.4.3 Checking the magnetic brake

•
Engage motors.
•
Set the Multimeter to resistance measuring.
•
Measure the continuity or resistance (R
20 200 Ω) of the brake coil motor circuitry at
the connector plug contacts shown in the
adjacent sketch.

16.4.4 Checking the freewheel switch

•
Disengage motors.
•
Set the Multimeter to resistance measuring.
•
Measure the brake coil resistance (R
illustrated in 16.4.3. The measured value must be infinite.
Fault
No continuity of the
motor electric circuit .
R = 0 Ω.
.
R > 200 Ω, but <
Issued: 21.01.02
Checking the magnetic
req
= ∞ Ω) between the connector plug contacts
req
Cause
•
Broken cable in motor.
Carbon brushes worn out.
•
Short-circuit in magnetic
brake.
•
Fine short circuit in
magnetic brake.
Service Manual
=
R
Remedy
Replace motor.
Check / replace carbon
brushes.
Replace motor.
Replace motor.
Page 155
Cha
pt.
12.4
16.3
12.4
12.4