Washer Vibration; Motor Control Troubleshooting - Bosch WFVC VISION 16 Repair Instructions

5.3

Washer vibration

Front loaders can vibrate more than top loaders due to higher spin
speeds. Checklist for occasional vibration:
Re-level washer – Most vibration service calls come from
improperly leveled washers. Re-level washers side to side and
front to back using a bubble level.
contact the floor firmly -- adjustments as slight as a ¼ of a turn
(in leveling legs) make a difference since each leg must support
25% of the weight.
Raise front of washer – Tests have proven raising both front
legs of washers by 1/8 – ¼ inch (after leveling washers) lowers
vibration.
Retract leveling legs to lower washer as much as possible –
When leveling, start with all legs fully retracted and extend only
as necessary for proper level.
Tighten leveling leg locknuts – Prevents loosening over time.
Remove all four shipping bolts – Shipping bolts or their red
plastic spacers have been left in washers. Make sure all four
shipping bolts and plastic spacers (that have fallen inside
washers) have been removed.
Use double-sided tape under leveling legs – Helpful for
washers on slick floors.
Check dampers – Make sure dampers are working properly and
all nuts are tightened.
Check springs – Make sure all three springs are properly
attached and are free to move.
Check bottom (base) panel for damage – Bent bottom (base)
panels can cause vibration.
damage.
Check counterweights – Replace any broken or cracked top
and front counterweights. Tighten all bolts.
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Each leveling leg must
Check washers for shipment
Reinforce floor – Wooden sub-floors may need reinforcing,
especially on upper floors, as some aren't adequate for modern
high-speed appliances.
5.4

Motor control troubleshooting

•
Test programs (see section 6.1) generate separate fault codes
for washer and motor controls, listed separately in fault code lists
– washer ("Er:xx") & motor control ("dr:xx").
•
Motor control output is 3-phase, variable voltage / frequency,
so averaging digital / analog meters provide inaccurate readings.
•
Run P4 motor test to diagnose problems (section 6.1).
necessary, connect a (2
Replace the motor control if the (2
st
and replace the (1 ) faulty motor if the (2
nd
) good motor and re-run the P4 test.
nd
) good motor doesn't work
nd
) good motor works.
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