REU-2532FFU Series 43 Rinnai
Error code “14” Check the thermal fuse.
a. # Disconnect connector B
3
and C
3
, measure the
resistance between the red – red wires.
Normal: Less than 1Ω
If normal, check b below.
Faulty: Check manifold gas pressure. Check heat
exchanger for cracks and/or separations. If
there is nothing abnormal, replace the thermal
fuse.
b. Check bi-metal switch, (remaining flame safety
device). Measure resistance between the two
terminals at B
3
and C
3.
Normal: 100 – 120 VAC
If normal, process to item a below.
Faulty: Replace the bi-metal switch.
Combustion stops due to flame failure
1) Is the flame rod functioning normally ?
a. Measure the voltage between the flame rod
terminal C
1
and the appliance earth.
Normal: 5 – 150 VAC from yellow to ground.
If normal, check b below.
Faulty: Replace the PCB unit.
b. Check that the flame rod attachment is not loose.
Normal: Replace the PCB unit.
Faulty: Secure the flame rod bracket.
2) Is the earth lead wire connected ?
a. Check for defective earth terminal, or an open
circuit or short. If normal, investigate other
possible causes for the flame failure.
(Eg. Is the gas valve open ? Is the filter mesh
blocked ?) Was proper venting material used?
Did you regulate your gas supply pressure to the
proper gas pressure for gas type being used?
Faulty: Ensure unit is properly grounded. Check
ground circuit outside home at service pole.
There should be an eight foot ground rod driven
in the earth and a copper lead tied to the service
meter. Ensure connection on ground rod is tight
.
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