Rinnai REU-V2632FFUG Service Manual page 27

7). Water Flow Servo Circuit
a.) Disconnect relay connector (G
PCB unit side (while operating).
Normal: DC11-13V
If normal: proceed to c.).
Faulty: Replace PCB unit.
b.) Measure voltage between Black and Yellow with relay connector (
flowing, water flow servo fully open).
Normal: DC4~7V (Pulse 17~460Hz)
Faulty: Replace Water Flow Servo with Water Flow Sensor.
c.)
Measure voltage between Black and Brown with relay connector (G
flowing, water flow servo fully open).
Normal: DC4~6V
Faulty: Replace Water Flow Servo and Water Flow Sensor.
8). Hot Water Outlet Thermistor Circuit
Check Hot Water Thermistor if error code "32" is displayed.
Disconnect relay connector (G
When disconnected: voltage >1M
When short circuit: voltage > 1
Normal: Check Heat exchanger outlet thermistor
Faulty: Replace hot water outlet thermistor.
If normal proceed to Flame Rod circuit.
Faulty: Replace the Hot water Outlet Thermistor.
Note: For controller readout of thermistor temperature whilst operational refer maintenance
monitor. Disconnect relay connector (G
9). Surge Protector (D
Check the fuse. Blue-Brown
AC207~264V
a.) Unplug the power plug.
b.) Check whether or not the fuse (3A) x 2 has blown by measuring the voltage.
Normal: <1
If normal go to step Electrical Fuse 13.
Faulty: Replace fuse/s (3A x 2). Check for a short next time it's turned off.
10). Electrical Fuse
a.) Measure voltage between Blue-Brown on the connector (
Normal :AC 207~264V
If normal proceed to b.). (11~13
Faulty: Check if voltage on the fuse
terminal is AC207~264V
b.) Measure voltage between White-White on the (F
Normal: AC207~264V.
Faulty: replace surge protector unit.
Infinity REU-V2632FFUG / HD200i REU-VM2632FFUC
REU-V2632FFUG / REU-VM2632FFUC
), and measure voltage between Red (+) and Black (-) on
6
) or (G ) and measure voltage White -White.
5 4


) and measure voltage White -White.
5
)
1
G
1
)
D
1
).
1
- 22 -
) connected (with no water
6
) connected (with no water
Issue 1 - 16/12/09 ©Rinnai