Rinnai INFINITY REU-3203W Service Manual page 33

3d.Solenoid Valve 3 (SV
3e.Modulating Valve Circuit.
Infinity REU-3203W
) Circuit.
3
- 28 -
a.)
Disconnect Solenoid connector, measure
resistance between Yellow and Black.
Ω
Normal: 1.8~2.2k
If normal, proceed to
Faulty: Replace Solenoid Valve 3.
b.)
Measure voltage between Yellow and
Black of SV connector.
3
Normal: DC80~100V
If normal, proceed to Modulating valve
circuit.
Faulty: Replace PCB.
a.)
Disconnect Modulating Valve fasten
terminal and measure resistance between
terminals.
Ω
Normal: 70~90
If normal, proceed to
Faulty: Replace Modulating Valve.
b.)
Measure voltage between Orange and
Orange of Modulating Valve fasten
terminal.
Normal: DC1.0~25V
If normal, proceed to
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.
b .
b .
c .
o
C.
©Rinnai