Bosch WBE 4100, Repair Instructions

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1 695 656 135 2011-01-12
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Robert Bosch GmbH
Problems and error codes | WBE 4100 | 21 WBE 4100 | 21 | 21 en
4. Problems and error codes
During the working of the balancing machine, there can be several problems If the microprocessor detects them,
they appear on the display through the notice "Er“ followed by a number which stands for the meaning.
Here is a list of the general malfunctions and the error codes with their respective and possible solutions:
Error code Problems Causes and possible solutions
The machine does not turn on
R
Absence of power supply from the outside or ab-
sence of a phase. Check that the phase and the neu-
tral are connected to the balancing machine.
R
Break of the fuse F3 in the electric circuit (see the wiring dia-
gram N. 654144). Substitute the fuse F3 with other identical fus-
es having the same characteristics: 2,5A 250V 5X20 glass. A new
break of the fuses involves a malfunction in the electrical part.
R Break of the fuses F1 – F2 on the board (see the wiring di-
agram N. 654144). Substitute the fuse F1 and/or F2 with
other identical fuses having the same characteristics: F1
(500mAT 5X20 glass) F2 (400mAT 5X20 glass). A new break
of the fuses involves a malfunction in the electrical part.
R Substitute the board (chapter 9).
R Check the electric circuit with a tester (See diagram N. 654144).
The machine does not turn on although you
are closing the carter or pressing START.
R Check the micro switch of the carter (chapter 8.5).
R
Check the gear relay
R
Check the engine and the condensers. (chapter 8.3).
R
Substitute the board. (chapter 9).
After the launch, the machine does not brake.
R
Check the two brake relays.
R
Substitute the board (chapter 9)
After the engine starts, it does not stop
(even if you turn the machine on and
off, the engine starts immediately).
R
Check the relay whose contact could remain blocked.
R
Substitute the board (chapter 9).
NOTE: In order to understand if the problem is the relay or the
board, you need to remove the board connector from the cir-
cuit. If the problem persists, check the relay and the board.
Unbalance values are not steady if you
make several consecutive launches on the
same wheel (variations higher than 5 gr.).
Recalibrate the balancing machine (chapter 7).
R
Check the tension and the phase of the pick-
ups. (chapter 8.1 and chapter 8.4.1).
R
Check the correct locking of the wheel on the flange.
Err 1
The board has lost the calibration and
configuration data set up in factory.
Recalibrate the balancing machine (chapter 7).
Err 1
One or more calibration or configura-
tion steps have not been made.
R
Make the missing calibrations steps. (chapter 6 and chapter .5).
R
If the error persists, substitute the board.
Err 2
The protecting carter has been lift-
ed up before the end of the measure.
R
Before lifting up the protecting carter, wait un-
til the launch of the measure has been completed.
R
Check the micro switch. (chapter 8.5).
Err 3
During the spin (when you pressed
START or lowered the carter) the
wheel was turning backwards.
Be sure that the wheel is not moving during the start. An-
yway, do not turn it backwards during the start.
Err 3
Inverted windings of the engine.
Verify the correct connection of the engine. (chapter 8.3).
Err 4
The engine does not reach the neces-
sary turns for a good balancing.
Check the net tension and the wiring diagram N. 654144).
Err 4
Malfunctioning of the electronic board.
Substitute the electronic board. (chapter 9).
Err 4
Malfunctioning of the electric circuit.
Substitute the engine or the condenser. (chapter 8.3).
Err 5
The calibration weight has not
been applied to the wheel.
Repeat the calibration procedure from the beginning and apply the
calibration weight when the calibration requires to. (chapter 2.5).
Err 5
The pick-ups have not been connected.
Check the connection of the pick-ups. (chap-
ter 8.1 and chapter 8.4.1).
Err 6
The protecting carter is not down.
Push down the carter when the wheel is mounted.
Err 6
Break of the carter micro switch.
Substitute the micro switch. (chapter 8.5).