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11/6/2018
© 2015 Rinnai America Corporation
PROPRIETARY and CONFIDENTIAL
Enhancing Lives By Changing The Way Water Is Heated
Water Flow Sensor
Power must be turned on to the appliance for this section of troubleshooting.
1. Measure voltage of
Water Flow Sensor on P.C. board at Connector H & D on P.C. board:
a. Connector “D” black wire pin #30 & red wire pin #12 should have 11 ~ 13 VDC or less than 1 ohm at
red arrows
b. Connector “H” yellow wire pin #12 & Connector “D” pin #30 black wire should have 4 ~ 7 VDC
at
black arrows.