Rinnai REU-V2632FFUG, Service Manual

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Infinity REU-V2632FFUG / HD200i REU-VM2632FFUC - 23 - Issue 1 - 16/12/09 ©Rinnai
REU-V2632FFUG / REU-VM2632FFUC
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
6
).Grey-Yellow.
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
4
) and (
D
5
) and measure voltage between Yellow-Yellow on
heater side (water flow servo and HW connection).
Normal:
53

If normal, proceed to
b
.).
Faulty:
Replace Valve Heater.
b.)
Disconnect relay connector (
D
4
) and (
D
5
) and measure voltage between Yellow-Yellow on each
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
4
) and measure voltage between Blue-Blue.
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.