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11/6/2018
© 2015 Rinnai America Corporation
PROPRIETARY and CONFIDENTIAL
Enhancing Lives By Changing The Way Water Is Heated
Venturi Control Device Servo
Power must be turned on to the appliance for this section of troubleshooting.
1. Measure resistance of
Venturi Control Device Servo on the P.C. board at Connector D:
a. Connector “D” Red wire pin #12 & Black wire pin #30 at the P.C. board = 12 ~ 14 VDC when 120 VAC
is on feeding unit at black arrows.
b. Connector “D” Brown wire pin #25 & Black wire pin #30 at the P.C. board = Less than 1 VDC at red
arrows.
c. Connector “D” Grey wire pin #23 & Black wire pin #30 at the P.C. board = Less than 1 VDC at blue
arrows.
d. Connector “D” Blue wire pin #5 and white wire pin #7 = 35 ~ 41 ohms
e. Connector “D” Yellow wire pin #11 and Red wire pin #9 = 35 ~ 41 ohms
