Grain-systems PNEG-377 User Manual download pdf (Page 13)

Fan and Heater

1. Check for 220V between points C and F. If no

voltage present, check power at primary disconnect.

2. Check for 220V between points C and D. If no

voltage present, check "J" (thermostat) wires.

(on units with " J " wires)

3. Check for 220V between points C and E. If no

voltage present, replace or reset thermal motor

overload.

4. Check for 220V between points F and G. If no

voltage present, replace 1/4 amp fuse.

5. Check for 220V between points F and H. If no

voltage present, checkout stop switch and replace

if necessary.

Push Start Button, Nothing Happens:

CAUTION! BE VERY

CAREFUL WHEN

CHECKING OUT 220V OR

460V CONTROL CIRCUIT.

SERIOUS INJURY OR

DEATH MAY OCCUR IF

PROPER PRECAUTIONS

ARE NOT TAKEN.

Figure 3: Fan circuit board.

6. Check for 220V between points F and I (while

pressing start button). If no voltage present

checkout and replace start switch if necessary.

7. Check for 220V between points A and B (while

pressing start button). If voltage present and

no start, replace coil on contactor.

Push Start Button, Fan Starts but will

not Continue after Start Switch is Re-

leased

1. Auxiliary switch on contactor is probably bad,

checkout and replace if necessary.

Note: Always check for 220 volts at check points.

110 volts to ground does not necessarily mean

check point is okay. Voltage may bleed through

contactor coil and other similar parts.

IMPORTANT: ALL OF THE BELOW SYMPTOMS MAY BE CAUSED BY LOOSE WIRING OR CONNECTIONS.

ALWAYS CHECK IT FIRST!

TROUBLESHOOTING

Fan Control Circuit

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Grain-systems PNEG-377 User Manual Page 13

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