Fresenius Medical Care 2008K Troubleshooting Manual page 63

MOTORS- 3.0.0 MOTOR ROTATING COUNTERCLOCKWISE
a) Turn the machine off.
b) Referring the Figure (right) and
the wires from the distribution board to the NOTED motor to
assure it is connected properly.
c) Referring to Figure 29
oriented properly; locate its 'ID Decal', either on the top or
front of the head. If on the front, assure it is right side up. Is
the pump head oriented correctly?
Yes See procedure number
No Install the pump head correctly.
Figure 29 – Deaeration and Flow Motors Location / Orientation
NOTE: The DEAERATION motor/pump creates loading pressure and can be easily heard. It
should run at a constant speed (i.e. tone). If it 'stalls' the tone decreases indicating the motor (or
brushes) are bad. In this event, loading pressure decreases below minimum!
MOTORS- 3.0.1 CHECK THE MOTOR
a) Referring to the Figure (right), remove the pump head from the
motor.
b) Manually spin the 'Drive Magnet' 360°. Does it rotate freely?
Yes a) Assure the 'Drive Magnet' rotates the motor shaft. It
may have uncoupled.
b) A problem is not indicated however, the motor may
be stalling intermittently due to an intermittent bad
motor or brushes. Replace the brushes!
No Replace the motor (brushes WON'T help).
Figure 316 (page 60), trace
(page 61), to verify the pump head is
MOTORS- 3.0.1
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
(page 61).
Troubleshooting Motors
Page 61