REU-2532FFU Series 37 Rinnai
22. Electrical Component Analysis
Before carrying out checks marked with a # sign, disconnect power supply.
Unit’s wiring diagram can be found on page 35.
Appliance fails to operate (even remote control fails to operate).
1) Is the fuse blown
Fuses are located in plastic
holders in the main harness,
on the lower right hand side
of the appliance.
Check fuse.
a. Disconnect unit from power supply.
b. # Measure resistance to check the electric fuse (3
amp)
Normal: less than 1Ω
If normal, proceed to check item 2 below.
Faulty: Replace 3 amp glass fuse. If the fuse
blows again, investigate cause of short
circuit.
2) Is the main transformer normal ?
Check the transformer.
a. Measure the voltage and/or resistance at
connector F, black ~ white wires.
Normal: 100 ~ 120 VAC
51 ~ 63 Ω resistance
Faulty: Check for 120 – 125 VAC at the surge
protector, blue ~ brown wires, connector
F
7
.
Resistance reading 51 ~ 63 Ω
If normal, check item 3 on next page.
Faulty: Replace the transformer.
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