46 _ Troubleshooting
Check type
Check code
Checking method
Corrective actions
High
Temperature
Heating Check
HC
1. Check the hot water connections for the Inlet Valve.
- See the “Temperature Sensor Check”.
2. Check the operation of the Thermistor.
- See the “Heater Check”.
Leakage Check
LC
Check whether there is any trace of water leakage in the shutter.
�
Normal: No water leakage trace
- Faulty: Check the leakage location. Replace the faulty part.
- Normal: Replace the Main PBA assy.
Temperature
Sensor Check
tC
1. Check the connections for the Thermistor
(or Assy Sensor ECS) connector.
- Reconnect the Thermistor(or Assy Sensor ECS) connector.
Temperature
Sensor Check
tC
2. Check whether the Thermistor(or Assy Sensor ECS)
is operating normally.
- Measure the voltage between both ends of the Thermistor(or Assy Sensor ECS).
�
Normal: 0.2 to 4.5V
- Measure the resistance between both ends of the thermistor :Remove the
connector before measuring.
(DMT800/610/400/350, DW7933, DW80J3020, DW80K3021)
- Measure the voltage between number 2 and 4 in the
connector with power. (DW80F800, DW80F600)
See the Table right
THERMISTOR TABLE
Temp.
(ºC)
Temp.
(ºF)
Resistance (kΩ)
[DMT800/610/400/350,
DW7933, DW80J3020]
Current (Vdc)
[DW80F800,
DW80F600]
Resistance
(kΩ)
[DW7050,
DW5050]
Resistance
(kΩ)
[DW7050,
DW5050]
5
41
125.78
0.865
133.219
10
50
98.323
1.026
103.638
103.638
15
59
77.454
1.203
81.249
81.249
20
68
61.465
1.393
61.477
61.477
25
77
49.12
1.594
51.042
51.042
30
86
39.517
1.804
39.51
39.51
35
95
31.996
2.018
31.985
31.985
40
104
26.065
2.234
25.024
25.024
45
113
21.358
2.447
21.347
21.347
50
122
17.599
2.656
17.59
17.59
55
131
14.579
2.475
14.573
14.573
60
140
12.14
3.048
12.136
12.136
65
149
10.159
3.228
10.157
10.157
70
158
8.542
3.396
8.541
8.541
- Faulty: Replace the Thermistor(or Assy Sensor ECS).
-Normal: Replace the Main PBA assy. [Senser ECS]
[Senser ECS]
