Rinnai REU-V1620WG Service Manual page 25

4. Solenoid Valve 1 (Small) (SV
Check Solenoid valve 1 if error indicator "11" is displayed.
a) Measure resistance between Blue-Black wires of main solenoid connector (I
Normal: DC11~13V
If normal, proceed to b.
Faulty: Replace PCB.
b) Measure resistance between Solenoid 1 connectors.
Normal: 35~41
If normal, proceed to Solenoid Valve 2 (SV
Faulty: Replace Solenoid 1
5. Solenoid Valve 2 (Large) (SV
a) Measure voltage between black-yellow and black wires of solenoid valve 2 connector (
Normal: DC11~13V
If normal, proceed to b.).
Faulty: Replace PCB.
b) Measure resistance between Solenoid Valve 2 connectors.
Normal: 37~43
If normal, proceed to Modulating Valve Circuit.
Faulty: Replace Solenoid Valve 2.
6. Modulating Solenoid Valve (POV)
a) Measure voltage between pink-pink wires of the modulating solenod valve.(I
Normal: DC2.0~15V
If normal, proceed to c.).
Faulty: Replace PCB.
b) Measure resistance between modulating solenoid valve connectors.
Normal: 65~85
If normal, proceed to b.).
Faulty: Replace PCB.
c) Check the gas burner pressure changes when set temperature on the water control changes from
37°C to 55°C.
Normal: Burner gas pressure changes. Go to Water Flow Servo Circuit.
Faulty: Burner gas pressure does not change. Replace Modulating Valve.
REU-V1620WG / REU-V1620WB / REU-V1620WS / REU-V2024WG - 20 -
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Issue 1 - 6/04/09 ©Rinnai