Rinnai REU-V2632FFUG Service Manual page 28

11). Water Flow Control Device
Check the voltage between the 2-core water controller cable.
Measure the voltage between terminals on the water control terminal (G
Normal: DC 11~13V
If normal, replace the water control after confirming that the cable hasn't been
damaged or shorted.
Faulty: Because normal voltage is not given due a short circuit, despite the PCB being in
normal state, check Water Flow Servo circuit.
If solution is not given from the above replace PCB.
12). Anti-frost Heater Circuit
a.)
Disconnect relay connectors (D
heater side (water flow servo and HW connection).

Normal: 53
If normal, proceed to
Faulty: Replace Valve Heater.
b.)
Disconnect relay connector (D
connector on heater side.

Normal: 618
If normal, proceed to c.).
Faulty: Replace Anti-frost Heater.
13). Frost Sensing Switch
a.)
Disconnect relay connector (D

Normal: < 1
If normal, check wiring (AC240V
circuit).
Faulty: Replace Frost Sensing Switch.
14). Water Controller Connections
a.) Power to water controllers
Connections on the easy connect 12 V DC
Faulty:
If appliance works but no output voltage to water controllers replace PCB.
Infinity REU-V2632FFUG / HD200i REU-VM2632FFUC
REU-V2632FFUG / REU-VM2632FFUC
) and (D ) and measure voltage between Yellow-Yellow on
4 5
b
.).
) and (D ) and measure voltage between Yellow-Yellow on each
4 5
) and measure voltage between Blue-Blue.
4
- 23 -
).Grey-Yellow.
6
Issue 1 - 16/12/09 ©Rinnai