COATS Series XR 1750, 1750-2D, 1750-3D, 1750-3DI Balancer - Manual (Page 32)

26 • Important: Always read and follow the on-screen operating instructions.
Video Balancer
Error
Err. 2
Err. 3
Err. 4
Err. 5
Err. 6
Err. 7 /
Err. 8
Err. 9
Err. 11
Symptom
Too low speed when taking the
measurement.
During turns to measure the
unbalance value, the wheel
speed has gone below 42 r.p.m.
Calculation Error.
Incorrect Machine Self-
Calibration.
Counterclockwise rotation.
After pushing the wheel
turns in the opposite direction.
Wheel guard hood open or the
button has been pushed
without closing the wheel
guard hood.
RAM error or defect.
Reading error of NOVRAM
parameters.
Access error in writing NOVRAM
parameters.
Too high speed error.
During rotation to measure the
unbalance value, the wheel
speed has gone over 270 r.p.m.
START
START
Check
1. Very light / small wheel mounted on balancer - not enough inertia to
keep wheel rotating.
2. Check belt tightening.
3. Check the operation and adjustment of the encoder and in particu-
lar, the reset signal. (in MACHINE SELF-TEST “Green Screen”, Pos
counts from 0 to 255 and then 0 again). UP = cw, DOWN = ccw.
4. Replace the main PCB.
1. Check the wheel dimensions setting.
2. Check the piezo pick-ups connections - electrical & mechanical. (in
MACHINE SELF-TEST “Green Screen”, push on spindle shaft and
verify that both piezo outputs change.
3. Execute the 4-ounce weight (machine self-calibration).
4. Mount a wheel having a known unbalance (lower than 4.00 ounces
or 100 grams) and check the balancer reading.
5. Replace the PC board.
1. In MACHINE SELF-TEST “Green Screen” - check the operation of
UP/DOWN - RESET signals of the encoder.
2. Check the connection of the motor for rotation.
1. Reset the error by pushing button = .
2. Close the wheel guard hood and press button.
3. Check operation of the Hood Switch.
4. Press the button.
1. Reset NOVRAM and check operation or replace PCB.
1. Repeat the entire balancer calibration.
2. Switch the balancer OFF.
3. Wait a minimum time of 1 minute (approx).
4. Switch the balancer ON and check the proper operation.
5. Replace the Main PCB board.
1. Replace the Main PCB board.
1. Check for possible damage or dirt on the encoder disc - clean dirt
with a soft cloth - blow air across the optical units.
2. Check the operation and adjustment of the encoder and in particu-
lar, of the reset signal. (in MACHINE SELF-TEST “Green Screen”, Pos
counts from 0 to 255 and then 0 again). UP = cw. DOWN = ccw.
3. Replace the main PCB.
START
START
EXIT 7