Rinnai REU-2018W Service Manual page 40

15) Is the water temperature thermistor normal?
16) Is the changeover solenoid valve (SV
Infinity REU-2425W
Unable to adjust hot water temperature
) normal?
3
- 37 -
aa. Disconnect the connector (C
measure the resistance between
white wires.
See diagnostic points, for temperature at
various resistance.
Normal: Proceed to check item 2) below
Replace water
Faulty:
thermistor.
ab. # Disconnect the changeover
solenoid valve (SV
measure the resistance between the
solenoid terminals.
Ω
Normal: 1.3 ~ 1.9 k
If normal, go to (ac).
Replace
Faulty:
solenoid valve (SV ).
3
ac. Measure the voltage at the
changeover solenoid (SV3) blue ~
black connector.
Normal: DC 80 ~ 100V
If normal, go to item 3) on the next page.
Faulty: Replace the PCB unit.
Issue 2 - 5/07/04 ©Rinnai
) and
1
temperature
) connector, and
3
.
the changeover