Rinnai Continuum Series Service Manual page 48

Nature of Fault Examination Point
7. Check remote(s)
(where connected).
B. Digital monitor 1. Check water flow
lights up, but sensor.
combustion does
not commence.
(When remotes
are connected).
Error code "72" 2. Check flame rod
displayed on the
digital monitor.
Error code "32" 3. Check outgoing
displayed on water temperature
digital monitor. thermistor.
Error code "61" 4. Check combustion
displayed on fan.
digital monitor
REU-2532FFU Series
Diagnostic Point
2. Measure the Are valves within
voltage at connector those specified at left.
F with appliance
power supply on.
F – Black ~ white
100 ~ 120 VAC
F – Blue ~ Brown
7
100 ~ 120 VAC
Measure voltage 11 ~ 13 VDC Digital
between remote
control terminals at
D.
1. Measure voltage 11 ~ 13 VDC
between red ~ black
of connector B .
4
2. Measure voltage 4 ~ 7 VDC
between yellow ~
black at connector B
4.
Resistance > 1MΩ?
# Measure resistance
between flame rod
terminal C and earth
1
# Disconnect Are values as shown
connector B and at left.
5
measure resistance.
Open circuit: > 1MΩ
Short circuit: <1Ω
1. Check motor. 6 ~ 45 VDC (Fan on)
Measure voltage
between black ~ red 0 VDC (Fan off)
at connector A .
1
2. Check fan rotation 11 ~ 13 VDC
sensor. Measure
voltage between
black ~ yellow at
connector A
1..
3. Measure voltage 6 ~ 45 VDC
between black ~
white of connector
A
1.
48
Values Y/N
Yes Go to A – (7)
No Replace
transformer
Yes Check cable for
shorts or broken
wires. Replace
remote control
No Replace PCB.
Yes Go to B–1-2
No Replace PCB
Yes Go to B - 2
No Replace water
flow sensor.
Yes Replace PCB
No Replace flame
rod
Yes Replace water
temperature
thermistor.
No Go to B-4
Yes Go to B–5-2
No Replace PCB
Yes Go to B-4-3
No Replace PCB
Yes Go to B-5
No Replace fan
Action Repair
o
N
8
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11
12
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19
Rinnai