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4.9 Lid Switch and Out of Balance Switch
Lid Switch
If the lid is raised, the lid switch operates and stops the cycle when Smartdrive is stirring during fill or
Smartdrive is spinning, (braking). The motor should stop within 10 seconds, all the energy from the motor
is dumped into the brake resistor (Phase 1-4) or the pump (phase 5). It is important to understand that it
can be a worthwhile test to open the lid at 1000 RPM, this will exercise the braking circuitry in the Motor
Controller. If Smartdrive appears not to start it could be that the lid switch indicates that the lid is
open.
• The user may lift the lid during agitate to add clothes or watch the wash action. However, the motor
will stop if this is tried during spray rinse or final spin, or stop during fill.
• Smartdrive should pause when the lid is opened 50mm and restart at less than 12mm.
• Phase 1 and 2 (most) used a mechanical lid switch located on the Display Module.
• Phase 2 (Late) to 5 .The lid switch is controlled by a reed switch located under the top deck on the
right hand side towards the front. The reed switch is activated by a magnet which is moulded into the
lid assembly. This switch is closed when the lid is closed. Use a multimeter to check operation. The
resistance should be less than 2 ohms. Ensure that the wiring to the reed switch does not get trapped in
the top deck when reassembling.
• A ‘recently manufactured one piece lid’ is not designed for use with Phase 1 & 2 lid mechanical
switches. There is a hole at the back which does not push the lid switch lever.
Out of Balance Switch
When the Smart Drive is spinning it can sense when the wash load is out of balance and will stop and
retry spinning. If Smartdrive still senses an unbalanced load it will stop, give a short burst of beeps every
five seconds and the RINSE or SPIN light will flash. The load must be redistributed more evenly .
However, GW and MW models have the option where Smartdrive tries to automatically correct out of
balance loads. If it detects an unbalanced load, it will fill with water and agitate to redistribute the load
before trying to spin up again. Smartdrive has this option turned off to conserve water, it may be turned on
in OPTION ADJUSTMENT MODE.
• This switch is normally closed, (phase 2-5) normally open, (Phase 1). Some Phase 1 Smartdrive were
fitted with 3 terminal switches, make sure these are connected to the normally open position.
• Check operation using a multimeter. The resistance should be less than 2 ohms when closed.
• Fault code 43 indicates that this switch is permanently activated.
• Replace switch if there is any sign of corrosion.
• Phase 2. Technical bulletin WM70. Changing the OOB lever to an improved design can improve the
operation of this switch.
Out of Balance and Lid Switch Test
The status of the switches may be monitored in Diagnostic
Mode. Diagnostic mode is accessed by pressing ‘Wash Temp
Down’ and ‘Power’ buttons together. See section 8.2.