Rinnai REU-VR3237WG Service Manual page 26

4d.Solenoid Valve 3 (F
a.) Disconnect Solenoid connector, measure resistance between Yellow and Black.
Normal: 35 ~ 41 k
If normal, proceed to b).
Faulty: Replace Solenoid Valve 3.
b.) Measure voltage between Yellow and Black of SV
Normal: DC11 ~ 13 V
If normal, proceed to Modulating valve circuit.
Faulty: Replace PCB.
4e.Modulating Valve (E
a.) Disconnect Modulating Valve terminal & measure resistance between pink terminals.

Normal: 67 ~ 81
If normal, proceed to b.
Faulty: Replace Modulating Valve.
b.) Measure voltage between Pink and Pink of Modulating Valve fasten terminal.
Normal: DC2 ~ 15V
If normal, proceed to c).
Faulty: Replace PCB.
c.) Check the gas secondary pressure change when set temperature on the remote control
changes from 37 to 55
Normal: If secondary pressure changes, go to Water Flow Servo Circuit.
Faulty: Replace Modulating Valve.
Infinity REU-VRM3237WG / HD250e REU-VRM3237WC
) Circuit
4

) Circuit
2
°
C.
connector.
3
- 21 - Issue 1 - 19/05/09 ©Rinnai