REU-2532FFU Series 39 Rinnai
2) Is the flame rod normal ? Error “72” is displayed
Checking the flame rod.
a. # Detach the flame rod terminal C
1
, and
re-attempt operation.
(“72 is displayed)
Proceed to check item 3 below.
(no “72” displayed)
Inspect flame rod wiring for current leak and
inspect flame rod for carbon build-up.
Measure resistance between the flame rod
Terminal C
1
and the appliance earth.
Normal: 1 MΩ or more.
If normal, replace the PCB unit.
Faulty: Replace the flame rod.
See page 43 for additional information and
resistance values pertaining to the flame rod.
3) Is the water temperature thermistor normal ?
If error “32” is displayed, check the water
temperature thermistor.
a. # Disconnect connectorB
5
, and measure
resistance of the white ~ white wires.
Resistance > 1 MΩ = open circuit.
Resistance < 1Ω = short circuit.
Normal: Proceed to check item 4 on the
next page.
Faulty: Replace the water temperature
thermistor.
See page 44 for additional information and
resistance readings pertaining to the
temperature themistor.
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