Rinnai INFINITY REU-3203W Service Manual page 39

15.Bypass Servo Circuit 15.
16.Remote Control
Infinity REU-3203W
a.)
Disconnect relay connector (B
measure resistance.
Normal
CN Wire Colour
Br - W
B O - W
1
Y - W
R - W
If normal, proceed to
Faulty: Replace PCB.
b.)
Measure working voltage while relay
connector (B ) is connected.
1
Normal
CN Wire Colour
Br - W
B O - W
1
Y - W
R - W
Faulty: Replace Bypass Servo.
Check the voltage between the 2-core remote
control cable.
Measure the voltage between terminals on
the remote control terminal (H
Normal: DC 11~13V
If normal, replace the remote control
after confirming that the cable hasn't
been damaged or shorted.
Faulty: Because normal voltage is not
given due a short circuit, despite the
PCB being in normal state, check Water
Flow Servo circuit.
If solution is not given from the above
replace PCB.
- 34 -
) and
1
Value
Ω
15~35
GND
b .
Value
DC 2~6V
GND
).
1
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