Hi, Sid. Welcome to Just Answer.
Your unit does not use a mechanical switch to determine if there is an out of balance condition. It incorporates programming into the motor control modual to sense an OOB condition.
Please note the following from the service manual:Important:
If replacing the Service Version “A” suspension rods with the later suspension rods, the
Motor Control Module MUST be replaced as the new rods require modified software.
Also, if replacing a Motor Control Module on a Service Version “A” product, the new
suspension rods (supplied with the Motor Control Module kit) must be fitted.
Please see the following for additional testing and diagnosing your OOB problem.
If this does not correct the problem then you are looking at a new motor control modual.
Let me knoiw if you need anything else.
11 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.