Noritz NRC661-DV, Service Manual, Page: 41 / 78

41
CN10
Between White 13 - White 5
1 or less.
Check the High Limit Switch resistance .
Replace the High Limit Switch.
Check for improper connection of wiring .
Replace the Circuit Board set.
Normal Abnormal
When measuring the resistance,
disconnect the connector and
check the male side.
High Limit Switch triggered
Error Codes
Description
20 20
Display
Window
Remote
Controller
* It is not necessary to replace the Display
Window Circuit Board.
Check for the Heat Exchanger-Primar y is normal.
(ex. The surface discolors black, clogging, etc.)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
BL
R
W
O
GY
BK
W
BL
W
BL
<CN10>
Display Window
Circuit Board
Dip Switch
Data
Displ ay
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
CN63 : Between White 1 - Black 2
Check the Thermistor - Hot Water resistance.
Check for the Water Servo Main.
Check for improper connection of wiring.
When measuring the resistance,
disconnect the connector and
check the male side .
Normal
Normal
Normal
Abnormal
Replace the Circuit Board set .
Refer to the thermistor temperature
characteristics belo w.
Replace the Thermistor - Hot Water.
It is shown on page 7 ( 3). Check the Gas Proportioning Valve.
It is shown on page 6 ( 2).
Abnormally high output temperature
Error Codes
Description
161, 162, 163 16
Display
Window
Remote
Controller
* It is not necessary to replace the
Display Window Circuit Board.
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