118
11/6/2018
© 2015 Rinnai America Corporation
PROPRIETARY and CONFIDENTIAL
Enhancing Lives By Changing The Way Water Is Heated
7. Measure resistance of I
nlet Water Thermistor
–
(Plug H2)
:
a. Connector “H” white wire (turns black before getting back to board) pin #2 & white wire pin #4
- See values below.
b. Connector “H” blue wire pin #9 & blue wire (turn black before getting back to board) pin #11
- See values below.
8. Measure resistance or voltage of
Water Flow Servo Valve
–
(Plug D4)
:
a. Connector “D” red wire (turns black before getting back to the board) pin #30 & pink wire pin #20 –
44 ~ 52
Ω
.
b. Connector “D” white wire pin #16 & blue wire pin #14 –
44 ~ 52
Ω
.
c. Connector “D” grey wire (turns black before getting to board) pin #30 & orange wire pin #12 = 12 ~ 14 VDC,
9. Measure resistance of
Exhaust Temperature Thermistor - (Plug H3)
:
a. Connector “H” white wire pin #2 (turns black before getting back to board) & white wire pin #5 –
See values below.
10. Measure resistance of
Heat Exchanger Thermistor - (Plug H4)
:
a. Connector “H” white wire pin #2 (turns black before getting back to board) & white wire pin #6 –
See values below.
11. Measure voltage of
Freeze Protection Thermistor - (Plug H5)
:
a. Connector “H” white wire pin #2 & yellow wire pin #12. See resistance value below.
12. Check for 120 VAC to
Freeze Protection Heater Circuit
-
(Plugs C1 ~ C5
):
a. Connector “C” black wire pin #2 & black wire pin #3
- See values below.
59 ˚F
= 11.8 ~ 13.3K ohms
86 ˚F
= 6.7 ~ 7.4K ohms
113 ˚F
= 3.9 ~ 4.3K ohms
140˚F
= 2.4 ~ 2.7K ohms
221 ˚F
= 0.66 ~ 0.76K ohms.
Electrical Diagnostic Points
