47
Not displayed
Displayed
Disconnect the connector from the Flame Rod and to prevent grounding
the connecto r. And check whether “72” is di
.
t
o
n
r
o
d
e
y
a
l
p
s
This is displayed if the Flame Rod detects
fore ignition.
<Condition of occurrence for error code 72>
* It is not necessary to replace the
Display Window Circuit Board.
Flame Rod circuit abnormality
Error Codes
Description
72
72
Display
Window
Remote
Controller
Replace the Circuit Board set.
Replace the Flame Rod.
This error code is displayed due to failure on the circuit board (Gas Solenoid Valve drive circuit) or in the Gas Solenoid
Valve drive system's ground. The cause could be a welding issue on the Circuit Board. Basically, if this error occurs the
Circuit Board set should be replaced.
Gas Solenoid Valve drive circuit abnormality
Circuit Board abnormality
Error Codes
Description
71
71
Display
Window
Remote
Controller
731 Improper maintenance writers setting
Check for improper setting of maintenance writers on Circuit Board.
).
c
t
e
,
e
p
y
t
l
e
d
o
m
,
e
p
y
t
s
a
g
e
h
t
.
x
e
(
733 Dip Switch setting
Check the Dip Switch setting on the Display Window Circuit Board.
(ex. high el evation, vent length, etc.)
e
h
t
g
n
i
g
n
a
h
c
e
r
o
f
e
b
t
i
n
U
e
h
t
o
t
r
e
w
o
p
t
c
e
n
n
o
c
s
i
D
Dip Switches.
w
p
e
t
s
s
i
h
t
m
r
o
f
r
e
p
o
t
e
r
u
li
a
F
ill
d
e
d
o
c
”
3
3
7
“
a
n
i
tl
u
s
e
r
isplayed
on display Window.
734 Circuit Board abnomality
Circuit Board setting abnormality
(Improper maintenance writers settings and Dip Switch settings)
Circuit Board abnormality
Error Codes
Description
731
733
734
73
Display
Window
Remote
Controller
Disconnect the electrical power, then reconnect electrical power to the Unit to reset the system.
If the Circuit Board abnormality is continuous, replace the Circuit Board set.
* It is not necessary to replace the Display Window Circuit Board.
Circuit Board abnormality
Error Codes
Description
70
70
Display
Window
Remote
Controller
Содержание NRC661-DV
Страница 17: ...NR501 OD NR662 OD Thermistor Cold Water Thermistor Hot Water Gas Proportioning Valve 17...
Страница 19: ...19 5 Operation Flow Chart Water heating Shutdown procedure Ignition operation NR501 OD...
Страница 20: ...Water heating Shutdown procedure Ignition operation 20 NR662 OD...
Страница 70: ...the Heat Exchanger must be flushed is set to Flushing Mode from an authorized Noritz wholesaler 70...
Страница 71: ...located 71...