General Diagnostics - GE Monogram ZBD6400 Series Technical Service Manual

6000 & 7000 Series DISHWASHERS
4.11 GENERAL DIAGNOSTICS - All Models except 6600 & 6605
4.11.1 Overfill Mode - Drain Pump Operating
Continuously
Symptom: Overfill mode indicated by Heated Dry or Smart
Dry LED rapidly flashing and drain pump continuously oper-
ating.
An overfill mode may occur if the correct fill time mode not
been selected in relation to the water pressure supplied to the
dishwasher.
Three functions occur with the Overfill Pressure Switch (Level
2) contacts P2-21 & P2-24 continuity circuit and are listed
accordingly:
Circuit Diagram: Overfill Condition with the active circuit highlighted
Important. Check all wiring connections before reconnecting to supply.
• A circuit is connected to the Drain Pump. In this mode the
Drain Pump will run continuously.
• A further function provides an active supply to the drain tab
terminal of the electronic Power Control Board. A monitor
circuit within the electronic Power Control Board is acti-
vated when the drain tab terminal has an active potential.
All outputs from the electronic Power Control Board are
terminated.
• The Heated Dry or Smart Dry LED will rapidly flash.
Refer to the following circuit diagram which illustrates an
overfill condition with the active circuit highlighted.
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