Infinity REU-V3232W /HD250E REU-V3232WC - 36 - Issue 1 - 8/09/03 ©Rinnai
c.) Disconnect relay connector (J1) and ( J3)
and measure resistance between Yellow and
Yellow on Heat Exchanger Heater side.
Normal: 825
Ω
If normal, proceed to Frost Sensing Switch
18.
Faulty: Replace Anti-frost Heater A (assy).
[Measure when temperature is 4+/- 3
o
C.]
Note: If you cannot get the temperature
low enough, cool the low-temperature
sensing switch with ice etc.
18. Frost Sensing Switch
a.) Disconnect relay connector (J
2
) and measure
resistance between Blue and Blue.
Normal: < 1
Ω
If normal, check wiring (AC230V circuit).
Faulty: Replace Frost Sensing Switch.
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