Rinnai REU-2018W Service Manual page 35

Refer to diagram on bottom of previous page.
3) Is the remote control normal?
No combustion (despite remote control indication)
4) Is the water flow sensor normal?
Infinity REU-2425W
e. Check the voltage at centre PCB
connector F, green~green.
Normal: AC 16 ~ 20V
If normal, check item 3) below.
Faulty: Replace the transformer.
Note: Transformer voltage above applies
to the appliance in a standby, non-
functioning state.
Check voltage between the two remote
control cable conductors.
f. Check the voltage between terminals
on the remote control terminal mount
(H ).
1
Normal: DC 10 ~ 13V
If normal, check for open circuit or shorts
before replacing the remote control.
Faulty: Replace PCB.
g. Measure the voltage between red
and black of the relay connector (a
Normal: DC 11 ~ 13V
If normal, go to (h).
Faulty: Replace water flow control.
h. Measure the voltage between yellow
and black of the relay connector (a
Normal: DC 2 ~ 10V
If normal, go to 2).
Faulty: Replace the water flow sensor.
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).
2
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2
Issue 2 - 5/07/04 ©Rinnai