Rinnai INFINITY REU-3203W Service Manual page 37

11.Hot Water Outlet Thermistor Circuit
12.Surge Protector
Infinity REU-3203W
Check Hot Water Thermistor if error code
32 is displayed.
Disconnect relay connector (E
resistance White -White.
When disconnected: resistance >1M
When short circuit: resitance > 1
Normal: Check Heat exchanger outlet
thermistor
Faulty: Replace
thermistor.
Normal
o
Temp.
15 C
Resistance
12.3 kΩ
If normal proceed to Flame Rod circuit.
Faulty: Replace the Hot water Outlet
Thermiostor.
Note: For controller readout of thermistor
teperature whilst operational refer
maintenance monitor (chapter 17) No. 2.
Disconnect relay connector (E
resistance White -White.
Check the fuse.
a.) Unplug the power plug.
b.) Check whether or not the fuse (3A) x 2
has blown by measuring the resistance.
Normal: <1Ω
If normal go to step Electrical Fuse 13.
Faulty: Replace fuse/s (3Ax2). Check for
a short next time it's turned off.
- 32 -
) and measure
1
Ω
Ω
hot water outlet
o o o
30 C 45 C 75 C
7.0 kΩ 4.1 kΩ 1.6 kΩ
) and measure
1
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