Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 28 - Issue 2 - 21/03/06 ©Rinnai
7. Flame Rod Circuit
Check flame rod.
Disconnect flame rod terminal (B
5
), and re-operate.
“72” indicated:- Proceed to 3.
“72” is not indicated:- check for electrical leaks
from the flame rod.
Measure resistance between flame rod terminal (B
5
) and appliance earth.
Normal: >1
MΩ
If normal, replace PCB.
Faulty: Replace flame rod.
a.) Remove the Flame Rod terminal (B
5
) repeat operation procedure, if “72” is displayed again
check the Hot water outlet thermistor.
If “72” is not displayed check current leakage from the Flame Rod.
b.) Measure voltage between body earth and Flame Rod terminal (B
5
).
Normal: V
oltage AC100~160V
If normal, replaced PCB
Faulty: Replace Flame Rod.
c.) Check if the Flame Rod is securely fitted.
Normal: re
place the PCB
Faulty: Adjust the fitting of the Flame Rod
8. Earth Lead
Confirm the Earth Lead connection is secure (at round terminal), and check for broken or short
circuits in the lead.
If normal, check other possible causes for flame
failure (is gas valve open?, is the
filter blocked? etc.).
If faulty, tighten the earth lead, PCB, power cord and surge arrester.
9. Thermal Fuse Circuit
Check the Thermal Fuse.
Disconnect relay connector (B
3,
) and measure resistance between Black and Red.
Normal: <
1Ω
If normal, replace PCB.
Faulty: Replace Thermal Fuse if after confirming there is no damage to the appliance.
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