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Digiital Temperature Display Board - 501HT
Service Bulletin
501HTM3, UH200B
April 2008
Part # 0512106 Digital Temperature Display Board
The digital temperature display board does not control temperature, and is not interfaced with the timer board.
The wash display will update every 10 seconds •
The rinse display updates every 20 seconds if the temperature is below 170°F, and every second if the temperature is above 170°F•
TEST PROCEDURE
1. Remove the thermistor harness. The final rinse and wash displays should both read “E”.
2. Press and hold the final rinse display test button. The final rinse display should read 179°F - 180°F.
3. Press and hold the wash display test button for a minimum of 10 seconds. The wash display should read 140°F.
Note: Temperature readings while testing are displayed in °F, even if the board is set for °C during the test mode.
4. If both the wash and final rinse displays indicate specified temperatures, the temperature display board is operating properly.
Final Rinse
Display
Test Button
Wash
Display
Test Button
Display
Selector
Switch
°F or °C
Factory
Use
Only
Input Voltage
120VAC
Thermistor
Harness
Quick
Disconnect
Plug