Rinnai Continuum Series Service Manual page 43

1) Is the flame rod functioning normally ?
2) Is the earth lead wire connected ?
REU-2532FFU Series
Combustion stops due to flame failure
43
Error code "14" Check the thermal fuse.
a. # Disconnect connector B
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 and C
3
Normal: 100 – 120 VAC
If normal, process to item a below.
Faulty: Replace the bi-metal switch.
a. Measure the voltage between the flame rod
terminal C and the appliance earth.
1
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.
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
and C , measure the
3 3
3.
Rinnai
.