User manual
27 of 148
1. Confirm that the sender is connected to the correct input pin terminal.
Check the wiring for continuity. Check that the GSC400 is setup correctly
in the advanced menu.
2. With the generator not running, unplug the sensor (analog inputs) plug
from the controller. It’s the 2x4 pin connector on the bottom. On the
GSC400 sensor terminal, measure the DC voltage of the input pin to
battery negative. Do this on the GSC400 terminal, not the plug. It should
read 5VDC. If it does not, there may be a problem with the controller.
3. Plug the sensor connector back in. You may need to do this step with or
without the generator running. Look at the display on the GSC400 and
note the value displayed. Then measure the DC voltage from the output
of the sensor to battery negative. Note the reading. Lookup the pressure
or temperature value using this voltage in the tables below. If it matches
the value displayed on the GSC400 then the sender may be bad. If it
does not, there is an issue with the wiring or setup or the controller may be
bad.
4. Disconnect the sensor plug again and
measure the resistance from the pin on
the plug to battery negative. Refer to
the below tables. Does the value from
the table match the expected value? If
not, the sender or wiring may be bad.
Datcon 1 - Temperature
Resistance
(Ohms)
Voltage (V)
Temperature
(
0
F)
Pin
2
Pins 3/4
7
---
0.03
330
28
---
0.14
300.8
49
0.23
0.23
275
72
0.34
0.34
248
96
0.44
0.44
221
120
0.54
0.54
203.5
147
0.64
0.64
189.7
173
0.74
0.74
181.5
202
0.84
0.84
175
232
0.94
0.94
167.5
263
1.04
1.04
160
296
1.14
1.14
155
330
1.24
1.24
149.2
367
1.34
1.34
144.1
406
1.44
1.44
140.1
446
1.54
1.54
134.8
491
1.65
1.65
129
628
1.93
---
120.7
736
2.12
---
114.2
855
2.30
---
107
996
2.49
---
99.6
1160
2.69
---
92.4
1349
2.87
---
85.4
1579
3.06
---
79.4
1860
3.25
---
72
Datcon 1 (Stewart) - Oil Pressure
Resistance
(Ohms)
Voltage (V)
Pressure
(PSI)
Pin
2
Pins 3/4
34
---
0.16
99
45
---
0.22
91
57
---
0.27
82.8
68
---
0.32
75.3
79
---
0.37
68
92
---
0.42
57.4
104
---
0.47
50
116
---
0.52
43.5
128
---
0.57
37
142
---
0.62
30.5
154
---
0.67
25
168
---
0.72
20
182
---
0.77
16
196
---
0.82
12
210
---
0.87
8
226
---
0.92
3.8
241
---
0.97
0