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A CSM is a protective device that is part of GE, Prole, Haier, Café, Adora and Monogram Dishwashers
and located on the main control board. This device is designed to trip if current leakage to ground
is above 20mA ± 5mA is detected. The CSM functions similar to commercially available GFCI's. If
tripped, the dishwasher is non-responsive. All the LED's will ash and models with a display will show
888 until the CSM is reset. Cycling power or entering Service Mode will reset the CSM. The Service
LED on the main control ashes to advise the control software is functioning.
The cause of tripping is likely external to the board itself. The board should only be replaced after
all other diagnostic tests have been completed and all other potential causes have been ruled out.
Potential causes of current leakage to ground could be due to water leaking onto a live component, a
component malfunction, or a fault within the wiring harness. If water caused the CSM to trip, the leak
must be repaired. The dishwasher may run until a leak causes the trip to reoccur. Resetting the CSM
without xing the underlying issue will likely result in a repeat call. Always perform a visual inspection
of the exposed heating element, looking specically for cracks, splits, or swelling of the sheath.
CSM Diagnostics
The CSM and Heater may be tested by running test 7 in Service Mode
NOTE: Normal water level must be present when checking the circulation pump, drain pump, and the
heater.
Circulation Pump
causes CSM to Trip
Drain Pump causes
CSM to Trip
Heater causes
CSM to Trip
Check for water Leak(s), as
dishwasher is running in Normal
cycle does it leak?
Replace Heater
No
Yes
Replace Circulation
Pump
Replace Drain Pump
Start a Normal Cycle. Did CSM
trip immediately?
Yes
No
Look for evidence of water leak under
the dishwasher, repair leak(s) as
needed and reset CSM
Use Service
Mode to Test
each Load
Repair leak and retest
CSM is Tripped
CSM (Current Sense Module)
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