Component And Circuit Checks - Rinnai REU-K2430WG Service Manual

16. Component and Circuit Checks

1. Combustion Fan Circuit
Check the Motor
Check the combustion fan if the error indicator displays "61".
Measure voltages between Black-Red of the PCB connector (B
Normal: DC15~46V (when fan ON)
DC0V (when fan OFF)
If normal proceed to check the rotation sensor
Faulty: Replace PCB
Check for the Fan Rotation Sensor
a.)
Measure voltages between Black-Yellow of connector (B
Normal: DC11~13V
If normal proceed to b.).
Faulty: Replace PCB.
b.)
Measure voltages between Black-White of connector (B
Normal: DC5~10V (20~400Hz)
If normal proceed to - 2. Sparker Circuit.
Faulty: Replace Combustion Fan.
2. Sparker Circuit
a.)
Measure voltages between Grey-Grey of connector (C
Normal: AC207~264V
If Normal proceed to b.).
Faulty: Replace PCB.
b.) Disconnect connector (C

Normal: 1M
If not sparking, adjust or replace ignition plug.
Faulty: Replace Sparker.
3. Main Solenoid Valve (SV
Check the main solenoid if error indicator "11" is displayed.
a.)
Disconnect Main Solenoid connector (I
Normal: DC11~13V
If normal, proceed to
Faulty: Replace PCB
b.)
Measure voltage between Main Solenoid connectors.
Normal: 24~28
If normal, proceed to 4. Solenoid Valve SV
REU-K2430WG-AK (Envirosmart )
REU-K2430WG-AK
) and measure voltage between both terminals of the sparker.
1
) Circuit (I
0
) and measure voltage between Pink-Black
5
b
.).

).
1
).
1
).
1
).
1
)
5
Faulty: Replace Main Solenoid.
1
- 21 - Issue 1 - 16/12/09 ©Rinnai