
42
Check the drain line is clogged or frozen.
n
o
C
e
t
a
s
n
e
d
n
o
C
e
h
t
f
o
e
d
o
r
t
c
e
l
e
l
e
v
e
l
r
e
t
a
w
e
h
t
k
c
e
h
C
tainer.
Disconnect the wiring connector of the
water level electrode
rm
the maintenance monitor # 19 to know
the cause.
[000] : Normal
[001] : Abnormal.
<When not using the maintenance monitor>
CN63 : Between White 11 - Black 2
DC 4.5 - 4.9V
Condensate Container clogging
Error Codes
Description
29
29
Display
Window
Remote
Controller
* It is not necessary to replace the
Display Window Circuit Board.
Check for wiring damage, short-circuiting .
Replace the Circuit Board set .
Replace the Condensate Container .
Check for the clogging of the
Condensate Container drain system.
Normal
Abnormal
Normal
Abnormal
<Condition of occurrence for error code 29>
The error message is displayed if water level electrode is shorted.
The maintenance monitor # 19
is displaying [001].
14
13
12
11
10
9
8
7
6
5
4
3
2
1
BL
W
R
Y
BK
BK
W
W
BK
W
<CN63>
Display Window
Circuit Board
Dip Switch
Data
Display
1 2 3 4
R BL BL BL
<CN142>
14
13
12
11
10
9
8
7
6
5
4
3
2
1
12
11
10
9
8
7
6
5
4
3
2
1
3
2
1
W
Y
O
R
BK
V
G
O
Y
W
4
3
2
1
BL
BL
BL
R
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1
2
3
4
5
6
7
4 3 2 1
BR Y BL R
R
O
Y
W
BL
R
W
O
GY
BK
W
BL
W
BL
2
1
BL/W
BK
BK 4 2
W
W
Fuse
3 1
R/R
G
3
2
1
BL
6
5
4
3
2
1
BK
R
W
W
3
2
1
R
BL
G
BL
W
R
Y
BK
BK
W
W
BK
W
<CN63>
<CN135>
<CN78>
<CN59>
<CN142>
<CN104>
<CN27>
<CN92>
<CN101>
<CN10>
<CN75>
<CN102>
<CN89A>
<CN89B>
<CN42>
Main
Circuit
Board
Po wer
Circuit
Board
Circuit Board
1 2 3
Check the Ther mistor - Air open or short circuit.
CN63 : Between Black 5- Black 2
DC 0.7 - 4.4V
Resistance : Refer to the table below.
When measuring the resistance,
disconnect the connector and
check the male side.
Normal
Abnormal
Thermistor - Air abnormality
Error Codes
Description
301 (Open)
302 (Short)
30
Display
Window
Remote
Controller
* It is not necessary to replace the
Display Window Circuit Board.
Replace the Thermi stor - Air .
Check for improper connection of wiring.
Replace the Circuit Board set.
14
13
12
11
10
9
8
7
6
5
4
3
2
1
BL
W
R
Y
BK
BK
W
W
BK
W
<CN63>
Display Window
Circuit Board
Dip Switch
Data
Display
1 2 3 4
R BL BL BL
<CN142>
14
13
12
11
10
9
8
7
6
5
4
3
2
1
12
11
10
9
8
7
6
5
4
3
2
1
3
2
1
W
Y
O
R
BK
V
G
O
Y
W
4
3
2
1
BL
BL
BL
R
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1
2
3
4
5
6
7
4 3 2 1
BR Y BL R
R
O
Y
W
BL
R
W
O
GY
BK
W
BL
W
BL
2
1
BL/W
BK
BK 4 2
W
W
Fuse
3 1
R/R
G
3
2
1
BL
6
5
4
3
2
1
BK
R
W
W
3
2
1
R
BL
G
BL
W
R
Y
BK
BK
W
W
BK
W
<CN63>
<CN135>
<CN78>
<CN59>
<CN142>
<CN104>
<CN27>
<CN92>
<CN101>
<CN10>
<CN75>
<CN102>
<CN89A>
<CN89B>
<CN42>
Main
Circuit
Board
Po wer
Circuit
Board
Circuit Board
1 2 3
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...