Infinity REU-VRM3237WG / HD250e REU-VRM3237WC - 25 - Issue 1 - 19/05/09 ©Rinnai
11. Hot Water Outlet Thermistor Circuit (G
5
)
Check Hot Water Thermistor if error code 32 is displayed.
Disconnect relay connector (G
5
) and measure resistance White -Pink.
When disconnected: resistance >1M
When short circuit: resitance > 1
Normal: Check Heat exchanger outlet thermistor
Faulty: Replace hot water outlet thermistor.
Refer circuit dia
gram diagnostic points for normal temperature versus resistant values.
If normal proc
eed to Flame Rod circuit.
Faulty: Replace t
he Hot water Outlet Thermistor.
Note: For controller readout of
thermistor temperature whilst operational refer
maintenance monitor (chapter 17) No.
2.
Refer circuit diagram diagnostic points for normal temperature versus resistant values.
12. Surge Protecto
r (D
1
) and electric fuses
a) Check the electrical fuses between D
3
and D
2
. Normal resistance across fuse < 1 .
If blown, replace with fues of correct rating (240V, 3A). If OK go to b).
b) Check supply voltage at D
1
. Voltage between white and black wires 207-264V.
If supply voltage incorrect check power supply to appliance. If OK go to c).
c) Check voltag
e at D
2
. Voltage between white and black wires 207-264V. If voltage is
zero repeat a). If fuses are OK replace surge protector.
13. Bypass Servo Circuit (H
1
)
a.) Measure working voltage while relay connector (H
1
) is connected.
Normal:
CN Wire Colour Value
B
1
Br - W
O - W
Y - W
R - W
GND
DC 2~6V
Faulty: Replace PCB.
b.) Disconnect relay connector (H
1
) and measure resistance.
Normal:
CN Wire Colour Value
B
1
Br - W
O - W
Y - W
R - W
GND
15~35
If normal, proceed to a).
Faulty: Replace Bypass Servo.
To Next Page
Loading...
Need help?
General
