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1-3. Outlet water temperature incorrect
Only connect and disconnect the connector after the fan has stopped rotating and then disconnect the electrical power.
(The Circuit Board and Fan Motor may be damaged otherwise.)
Check whether the Water inlet / Water outlet / Heat exchanger Thermistor are normal.
Normal
Set the"Operation" button to the
on position, and then disconnect
electrical power, and then open
the fixture (pass through the water
to the unit). Close the fixture, and
then reconnect electrical power.
Check the maintenance monitor.
The difference between No.30,
No.31 and No. 32 data should
be within ± 3˚C.
Check that the Water outlet thermistor is normal with the outlet water conditions.
Normal
Turn the unit on, and then set
the temperature to "37˚C" and
"60˚C" by using Remote
Controller*.
Open the hot water fixture fully,
and then confirm Water outlet
thermistor by the maintenance
monitor.
No. 31 data should be within
±3˚C of the set temperature.
No abnormality in appliance.
Normal
①CN38 Red 8 - CN38 Blue 17 DC1V - 16V
②CN38 Yellow 6 - CN38 Blue 17 DC1V or less
When the "Operation" button is ON.
③CN38 White 23 - CN38 Green 18 DC1V - 16V
④CN38 White 23 - CN38 Violet 20 DC1V - 16V
⑤CN38 White 23 - CN38 Orange 16 DC1V - 16V
⑥CN38 White 23 - CN38 Black 24 DC1V - 16V
Check for improper connection of wiring,
then replace the main flow control valve.
B
Abnormal
Check the thermistor resistance.
Normal
1
CN63 White 4 - White 2 (inlet)
2
CN63 White 1 - White 2 (outlet)
3
CN63 White 3 - White 2 (heat exchanger)
Refer to the thermistor temperature characteristics below.
Water inlet / Water outlet / Heat exchanger Thermistor Temperature Characteristics
Circuit Board
<CN42>
W
4
1
BK
5
2
6
3
1
W
2
2
W
1
2
3
3
W
3
4
W
1
5
W
6
W
7
W
<CN63>
Abnormal
1
<The occurrence condition for error code 65>
The error code is displayed if position detection cannot be performed
25 seconds after position resetting performed.
Set the"Operation" button to the off from on position,
and confirm the display of the remote controller.
Normal
Abnormal
(Not show 65)
(Show 65)
Check the voltage of the main flow contol valve.
(Check while the main flow control valve is activating,
for example when the "Operation" button is turned off.)
W
31
32
R
29
30
V
27
28
BK
O
25
26
G
4
3
W
23
24
BK
5
6
21
22
19
20
V
BL
17
18
G
O
O
15
16
13
14
BL
11
12
9 10
Y
7 8
R
Y
5 6
Y
R
3 4
BK
1 2
W
<CN38>
- 27 -
Abnormal
Check for improper connection of wiring,
connectors, etc., then replace the thermistor.
MAIN
CIRCUIT
<CN101>
BL
6
1
R
BOARD
R
7
2
BL
W
8
3
G
W
9
4
W
R
O
10
5
Y
V
O
1
BK
W
2
3
W
4
BL
5
W
O
6
BL
1
W
7
BR
2
W
8
GY
3
W
9
BK
4
W
10
O
5
W
Y
11
6
W
R
7
12
W
W
<CN10>
<CN63>
<CN38>
Error Code 65 Main flow control valve abnormarity
Circuit Board
<CN42>
W
4
1
BK
5
2
<CN101>
6
3
BL
6
1
R
R
7
2
BL
W
8
3
G
9
4
W
O
10
5
Y
6
1
BK
2
4
3
W
4
3
5
W
6
BL
5
7
BR
8
GY
9
BK
10
O
11
12
W
<CN10>
When measuring the resistance, disconnect
the connector and check the male side.
<CN186>
1
R
2
BK
3
W
4
G
5
BL
6
BL
31
32
1
BL
29
30
2
27
28
BK
<CN78>
25
26
G
23
24
BK
21
22
19
20
V
17
18
G
15
16
O
13
14
BL
11
12
9 10
Y
7 8
R
1
BL
5 6
Y
2
BL
1
2
3
3 4
BK
3
BL
BK
1 2
W
<CN89>
<CN197>
Replace the Circuit Board set.
Abnormal
Replace the Circuit Board set.
<CN186>
1
R
MAIN
2
BK
3
W
4
G
CIRCUIT
5
BL
6
BOARD
BL
W
31
32
1
BL
R
29
30
2
V
27
28
BK
<CN78>
O
25
26
G
W
23
24
BK
21
22
19
20
V
BL
G
17
18
O
15
16
O
1
W
13
14
BL
2
W
11
12
3
W
9 10
Y
4
W
7 8
R
1
BL
5
W
Y
5 6
Y
2
BL
6
W
R
3 4
BK
3
BL
7
W
1 2
W
<CN63>
<CN38>
<CN89>
<CN197>
1
2
3
BK
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