REU-2532FFU Series 49 Rinnai
Nature of Fault
Examination Point
Diagnostic Point
Values
Y/N
Action
Repair
N
o
Yes Go to B-5-2 1. Measure voltage
between grey ~ grey of
connector F
8
(sparker)
90 ~ 110 VAC
No Replace PCB 20
Yes Go to B-5-3 2. # Remove connector
F
8
and measure the
resistance between
sparker terminals.
Is resistance >1MΩ
No Replace sparker. 21
Yes Go to B-6 3. Check if unit is
sparking.
Is the sparker
sparking?
No Adjust/replace
electrode.
22
Yes Go to B-6-2 1. # Disconnect the
main solenoid valve
connector E from the
PCB, and measure
resistance between pink
~ black (SV0)
1.7 ~ 2.1KΩ
No Replace main
solenoid valve
(SV0)
23
Yes Go to B-7
5. Check sparker.
6. Check main gas
solenoid valve (SV0)
Error code 71
2. Measure voltage
between pink ~ black of
SV0 connector.
80 ~ 100 VDC
No Replace PCB 24
Yes Go to B-7-2 1. # Disconnect
connector E from the
PCB. Measure
resistance between
yellow ~ black (SV1)
1.7 ~ 2.1KΩ
No Replace (SV1) 25
Yes Go to B-8
7. Check solenoid
valve (SV1)
2. Measure voltage
between yellow ~ black
of SV1 connector.
80 ~ 100 VDC
No Replace PCB 26
Yes Go to B-8-2 1. #Disconnect
connector E from PCB.
And measure resistance
between blue ~ black
(SV2)
1.7 ~ 2.1KΩ
No Replace (SV2) 27
Yes Go to B9
8. Check changeover
solenoid valve (SV2)
2. Measure the voltage
between blue ~ black of
SV2 connector.
80 ~ 100 VDC
No Replace PCB 28
Yes Go to B-10 9. Check thermal fuse 1. #Disconnect
connector B
3
and C
3
measure resistance
between red ~ red
Is resistance <1Ω?
No Replace thermal
fuse
29
Yes Replace PCB 30
Error code “11”
displayed on
digital monitor.
Error code “14”
displayed on
digital monitor
10. Check overheat
(remaining flame) bi-
metal switch.
2. #Disconnect OHS
(remaining flame) bi-
metal switch festoon
terminal B
3
and C
3 ,
and
measure resistance
between terminal on
switch.
Is resistance <1Ω?
No Replace
remaining flame
bi-metal switch
31
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