Rinnai C42e - Page 18

Rinnai Water Heater Service Manual 18 100000098 Rev B
Electrical Diagnostic Points
R50LSi, R63LSe2, R75LSe-VA,
R75LSi-VA, R94LSe-VA, R94LSi-VA
Wire Color Voltage Resistance Connector No. Pin No.’s
(SV1, SV2, SV3, POV) Gas Valve and Modulating Solenoids
(Main) Pink - Black
11 - 13 VDC 36.8 - 44.8 ohms
H5 1 ~ 2
(SV1) Black - Yellow H6 1 ~ 2
(SV2) Black - Blue H7 1 ~ 2
(SV3) Black - Brown H8 1 ~ 2
(POV) Pink - Pink 2 - 15 VDC 67 - 81 ohms H3 1 ~ 2
(M) Water Flow Servo
Red - Blue 11 - 13 VDC 22 - 26 ohms F7 (1, 2) 10 ~ 9 (F)
Gray - Brown 4 - 6 VDC N/A F7 (5, 3) 5 ~ 7 (F)
Gray - Yellow N/A N/A F7 (5,4) 5 ~ 8 (F)
NOTE: At the F connector on the PCB: gray wire turns to black, orange wire turns to red
(QS) Water Flow Sensor
Black - Red 11 - 13 VDC 5.5 - 6.2 K ohms F2 1 ~ 3
Yellow - Black 4 - 7 VDC 1 - 1.4 mega ohms F2 2 ~ 3
Bypass Flow Control (only on R94LSe and R94LSi)
Brown - White
2 - 6 VDC
(unit in operating
mode)
15 - 35 K ohms G1
1 ~ 5
Orange - White 2 ~ 5
Yellow - White 3 ~ 5
Red - White/Ground 4 ~ 5
(IG) Ignition System
Gray - Gray 90 - 110 VAC N/A C1 1 ~ 2
(FM) Combustion Fan Motor
Red - Black 6 - 45 VDC N/A E1 1 ~ 2
White - Black 5 - 10 VDC 9.2 - 9.4 K ohms E1 2 ~ 4
Yellow - Black 11 ~ 13 VDC 3.5 - 3.9 K ohms E1 2 ~ 3
With the meter set on hertz scale, 60-420 hertz should be across the red and yellow wires at
terminals 2 and 4.