Out Of Balance Detection - Bump Detect - Fisher & Paykel AQUASMART WL26CW1 Service Supplement Manual

517794B
The straps serve two purposes:
1. To limit radial bowl motion during agitate.
2. As the straps stabilise the bowl, it also
improves wash performance.
If one or more straps break, this can cause an
increase in out of balance activity, which again
may lead to cabinet damage and noise from
loose straps.
For a detailed explanation of Bump Detect, refer
to Section 10.
10

OUT OF BALANCE DETECTION - BUMP DETECT

Past electronic machines have used a lever connected to a mechanical switch to detect if the load
in the inner bowl is out of balance. On Phase 7 machines this system has been replaced with
electronic sensing known as 'Bump Detect'. 'Bump Detect' is software written into the Motor
Control Module, which looks at specific feedback from the Rotor Position Sensor.
No fault codes are associated with 'Bump Detect', and there are no hard and fast tests that can be
carried out.
If a machine continually goes into an out of balance condition, then the following need to be
checked in the order given.
1. Even distribution of the clothes load.
2. Ensure that the machine is both level and stable on the floor.
3. Check that any of the straps on the neck ring are not broken and that they are fitted correctly.
4. Check the weight of the inner bowl. Bowl weight is as follows.
•
24lb 3oz +/- 10oz (10.965kg +/- 275g).
5. Check the RPS using a RPS Tester.
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