Grain Systems PNEG-630 - Manual (Page 103)

Portable Dryer Troubleshooting
102
Grain Sensor Testing
SENSORS COMP98.PRT
IF OHMS DOES NOT = 11.0 K CHECK LOWER AND UPPER TERMINAL STRIP (J7-13 GND & J7-14)
IF MEASUREMENTS DO NOT = 11.0 K CHECK CONNECTIONS IN WHITE JUNCTION BOX ON FAR LEFT AND RIGHT SIDES FACING THE FAN END.
IF NONE OF THE MEASUREMENTS = 11.0 K, THEN CHECK EACH INDIVIDUAL SENSOR.
USING OHM METER BEGIN CHECKING THE SENSORS FOLLOWING FIG.1
J2
RL1 COMMON
MONITORING DISPLAY
TRANSFORMER
FUSE
J6
J8 J1
1 1 3 3
J5
1 4
20
J7
1
2
3 5 7 9 11 13 15 17 19
4 6 8 10 12 14 16 18
N/C AIRSWITCH (5 VDC) N/O AIRSWITCH (5 VDC) GRAIN/PLENUM HIGH LIMIT SWITCH REAR DISCHARGE SWITCH + 12VDC OUTPUT TEMP SENSOR (GROUND) + 12VDC OUTPUT
HOUSING HI-LIM
AIRSWITCH COM (DC NEG)
GRAIN TEMP SENSOR
+ 12VDC OUTPUT
RS485 COM PORTS
N N N N N
N N
AC NEUTRAL INPUT RL1 N.C.
110VAC IN
IGN TRAN NEUTRAL
CYCLE SOL NEUTRAL
MAIN SOL NEUTRAL
LOAD COIL NEUTRAL
CYCLE SOL PWR 120VAC MAIN SOL PWR 120VAC IGN TRANS PWR 120VAC
20
1
2
3 5 7 9 11 13 15 17 19
4 6 8 10 12 14 16 18
N
+12V DC
110V NEUTRAL
120VAC TO I/O BOARD
RL3 COM SCR IN
RL3 N.O. SCR DRIVE OUT
NO CONNECTION RL3 N.C.
RL1 N.O.
LIGHT AC NEUTRAL SPARE AC OUTPUT
AC NEUTRAL
+12VDC OUTPUT
FLAME PROBE A
FLAME PROBE B
12VDC NEGATIVE
START SWITCH
STOP SWITCH OUT OF GRAIN SWITCH
PLENUM TEMP SENSOR
MOTOR OVERLOAD
- -
-
-
12 VDC GROUND
11.0 ON A 20K SCALE AT 70 DEGREES
FIG.1
See page 47 for resistance vs.
Temperature chart
Competitor Wiring Reference