Noritz NRC661-DV, Service Manual, Page: 40 / 78

40
CN10
Between Blue 15 - White 13
2 or less
*If the Thermal Fuse is blown again, correct the . e s u a c
Normal Abnormal
Replace the Circuit Board set.
Check the overheat prevention device (Thermal Fuse) resistance.
When measuring the
resistance, disconnect the
connector and check the
male side.
Overheat Prevention Device (Thermal Fuse) triggered
Error Codes
Description
14 14
Display
Window
Remote
Controller
* It is not necessary to replace the
Display Window Circuit Board.
Check for improper connection of wiring.
Check for the Heat Exchanger-Pr imar y is norm al
(ex. The surface discolors black, clogging, etc.)
Replace the overheat pr evention device (Thermal Fuse).
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
Error Codes
Error Codes
Description
Description
121, 122 12
121
122 When the Unit fails the re-iginition after the Unit detected extinction.
When the Unit detects extinction 6 times in 5 minutes.
Display
Window
Remote
Controller
The trouble diagnosis for “Error Code 12” is same as “Error Code 11”.
<The occurrence condition for Error Code 121 and 122>