Rinnai Continuum REU2532-W Series, Service Manual

Page: 49 / 72

REU-2532W 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 the resistance
>
1M
Ω
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 ~ 2.1K
Ω
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 ~ 2.1K
Ω
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 ~ 2.1K
Ω
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
<
1
Ω ?
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
<
1
Ω ?
No Replace
remaining flame
bi-metal switch
31