Infinity REU-2425W
- 40 -
Issue 2 - 5/07/04 ©Rinnai
22. Electrical Component Analysis
Before starting inspection, re-check wiring harnesses and double check that all connections are tight.
Before carrying out checks marked with
*
, remove power cord from wall plug.
Nature of Fault
Examination
Point
Diagnostic Point
Values
Y/N
Action
Repair
N
o
A.
The ON indicator
does not light up after
switching the unit on.
1.
Is the power cord
plugged in?
Inspect visually
Is it plugged in?
Yes
Go to A - 2.
No
Plug in cord
1
2.
Is supply voltage cor-
rect?
Measure voltage at power
point.
AC 240 V
(NZ 230 V)
Yes
Go to A - 3.
No
Check power supply
circuit.
Check fuses.
2
3. Check 3 Amp electri-
cal fuses.
*Inspect visually
Is the surge protector
indicator lit up
Yes
Go to A - 5
No
Go to A - 6
4.
Check 3 Amp electri-
cal fuses.
*
Disconnect and measure
resistance to confirm if fuse is
blown. Normal< 1 M
Is fuse blown?
Yes
Go to A - 5 and replace
fuse.
No
Go to A - 6.
5.
Check for short cir-
cuits.
i) Measure the resistance of
each solenoid valve.
*
Remove connector I
from the PCB before measur-
ing.
Pink - Black
0.9 ~ 1.3 k
Yellow - Black
1.3 ~ 1.9 k
Blue - Black
1.5 ~ 1.9 k
Are values within
those specified at left?
N.B. Measure after
checking that there
are no broken wires
or shorts.
Yes
Go to A - 6 - 2)
No
Replace faulty solenoid
valves.
ii) Measure the sparker resist-
ance.
*
Disconnect the sparker con-
nector I
4
and measure the
resistance between both termi-
nals.
Is resistance > 1M
Yes
Go to A - 5-iii)
No
Replace sparker
4
iii) Check wiring
Are there any shorts?
Yes
Rectify/Replace
5
No
Replace PCB
6
6.
Check 240V-100V
transformer.
i) Measure voltage between
red-red A
1
connector.
AC 90~110 V
Yes
Go to A - 6 - ii)
No
Replace PCB.
ii) Measure voltage at connec-
tors A, F with appliance on
“standby”.
A, Green-Green
AC16 ~ 20 V
F, Orange-Orange
AC13 ~ 30 V
F, Brown-Grey
AC30 ~ 50 V
F, Yellow (LH)-Grey
AC180 ~ 220 V
Are values within
those specified at left?
Yes
Go to A - 7.
No
Replace 240V trans-
former.
8
7.
Check the remote
control (where con-
nected).
Measure voltage between the
control terminals at H
1
.
DC10 ~ 13 V.
Yes
Check cable for shorts/
broken wires; replace
remote control.
9
No
Replace PCB.
10
B.
Digital monitor
lights up, but
combustion does
not commence.
(When remotes
are connected)
1.
Check water flow
sensor.
i) Measure voltage between
red-black at connector C
2
DC11 ~ 13 V.
Yes
Go to B - 1 - ii)
No
Replace PCB
11
ii) Measure voltage between
yellow-black at connector C
2
DC2 ~ 10 V
Yes
Go to B - 4 - ii).
No
Replace water flow sen-
sor.
12
Error code “72” dis-
played on digital moni-
tor
2.
Check flame rod.
*
Measure resistance between
flame rod terminal A
2
and
earth.
Resistance > 1M
Yes
Replace PCB.
13
No
Replace flame rod.
14
Ω
Ω
Ω
Ω
Ω
Ω
Summary of Contents for REU-2018W
Page 8: ...Infinity REU 2425W 5 Issue 2 5 07 04 Rinnai 3 Dimensions Note All dimensions are in mm ...
Page 14: ...Infinity REU 2425W 11 Issue 2 5 07 04 Rinnai 7 Cut away Diagram ...
Page 15: ...Infinity REU 2425W 12 Issue 2 5 07 04 Rinnai 8 Schematic Diagram ...
Page 33: ...Infinity REU 2425W 30 Issue 2 5 07 04 Rinnai 20 Wiring Diagram ...
Page 54: ...Infinity REU 2425W 51 Issue 2 5 07 04 Rinnai 26 Exploded Diagram ...
Page 55: ...Infinity REU 2425W 52 Issue 2 5 07 04 Rinnai ...
Page 56: ...Infinity REU 2425W 53 Issue 2 5 07 04 Rinnai ...
Page 57: ...Infinity REU 2425W 54 Issue 2 5 07 04 Rinnai ...
Page 60: ...Infinity REU 2425W Issue 1 5 07 04 Rinnai Notes ...