rst 5.6 & rct 7.6 service manual 2007_rev1.0 |
RST5.6 & RCT 7.6 Sears Service Manual 2007
Auto Calibration Troubleshooting
Symptom
Possible Cause
Test Procedure
Repair
Failed Auto Calibration – Belt runs
for a few seconds and then stops
and E1 message on console.
Failed Auto Calibration – Belt never
runs and E1 message on console.
Failed Auto Calibration – Board
never sets speeds. Belt will con-
tinue to run and not stop.
Failed RPM sensor.
RPM sensor misaligned.
Failed console cable.
Magnet missing in front roller
pulley.
RPM sensor not aligned properly or
has failed.
Failed motor control board (MCB).
-Put machine into Eng1 and check
for slight fluctuation of speed in
speed window of display. (
Speed
should not fluctuate more than a
few hundredths.
)
-Adjust sensor bracket to correct
position.
-Check voltage and continuity of
console cable.
Reference Cut
Console Cable Voltage Chart. (p.
23 & 24)
- Verify positioning of sensor wire.
(Wire coming from RPM sensor
points toward the front of the unit,
sensor is as close as possible to
the magnet in the pulley without
touching, and the sensor bracket
90-degree angle, not bent in any
way.)
- Put machine into Eng1 and check
for slight fluctuation of speed in
speed window of display.
(Speed
should not fluctuate more than a
few hundredths.)
-If other tests mentioned above are
normal then replace MCB.
Replace RPM sensor.
Replace console cable.
Replace magnet.
Reference Troubleshooting for no
motor movement. (p. 4)
Replace RPM sensor.
Replace MCB.
