Rinnai B20 Manuel de service télécharger pdf (Page 49)

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 >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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