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Error Code 760
Remote Controller transmission abnormality
Check the voltage of Remote Controller terminal on Circuit Board.
Normal
Blue 1 - Blue 3
DC14-16V
Remove the Remote Controller cord.
Error Code 90 Air flow abnormality
Combustion abnormality
90 Air flow abnormality
1 Check air inlet for blockage or obstruction.
2 Check exhaust for blockage or obstruction.
3 Check whether the fan motor is normal.
(ex. Clogging of fan blades, etc.)
90 Combustion abnormality
1 Check air inlet for blockage or obstruction.
2 Check exhaust for blockage or obstruction.
3 Check the Fan Motor is normal.
(ex. Clogging of fan blades, etc.)
4 Check the Burner is normal (clogged*).
The detail conditions for this error code are shown on page 22.
* How to check for clogged burner
* Check for clogged burner
Note) Remove the Manifold.
Abnormal
Circuit Board
<CN42>
1
BL
2
BL
3
BL
<CN89>
Check for Remote Controller cord damage, short - circuiting or ground fault.
If there is no problem, replace the Remote Controller.
Burner
- 40 -
MAIN
W
4
1
BK
CIRCUIT
5
2
<CN101>
6
3
BL
6
1
R
BOARD
R
7
2
BL
W
8
3
G
9
4
W
O
10
5
Y
1
BK
2
3
W
4
5
W
6
BL
1
W
7
BR
2
W
8
GY
3
W
9
BK
4
W
10
O
5
W
11
6
W
12
W
7
W
<CN10>
<CN63>
Check for improper connection of wiring,
then replace the Circuit Board set.
<Condition of occurrence for error code 90>
Detected abnormal air flow when the unit will start.
If 1 to 3 check out okay, replace the Fan Motor.
Replace the Circuit Board set if the error code is
displayed again.
<Condition of occurrence for error code 90>
When the unit has begun to operate,
- Air inlet for blockage or obstruction
- Exhaust for blockage or obstruction.
If 1 to 4 check out okay, replace the Circuit Board set
if the error code is displayed again.
<CN186>
1
R
2
BK
3
W
4
G
5
BL
6
BL
W
31
32
1
BL
R
29
30
2
V
27
28
BK
<CN78>
25
26
O
G
W
23
24
BK
21
22
19
20
V
BL
17
18
G
O
15
16
O
13
14
BL
11
12
9 10
Y
7 8
R
1
BL
Y
5 6
Y
2
BL
1
2
3
R
3 4
BK
3
BL
BK
1 2
W
<CN38>
<CN89>
<CN197>
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