Grain Systems Bin Accessories PNEG-524 User Manual
Page 28
8. Operating Instructions
28
PNEG-524 Roof Exhaust Fan
If the fan just hums when turned ON, check the following:
1. Check to make sure that all leads of the power source have voltage present. If fan unit is not receiving
power on all leads, check for a blown fuse, broken wire or loose connection.
2. Check to see that all contact sets are closing. If one leg of the supply voltage is not available to the
motor, it will hum.
3. If power is available at all motor leads and the motor still hums, it should be taken to an authorized
service center for repair or replacement.
If the fan starts and operates for awhile and then shuts off, check the following:
1. Check the supply voltage. Voltage should be within ±10% of rated voltage. For example, a motor
rated at 230 volt should operate in a voltage range of 207 volt to 253 volt.
2. Check the supply wire size required for the fan unit.
3. Check the load on the main circuit to make sure other items on it are not overloading the fan circuit.
4. Check the amperage of the fan, if the unit is pulling above nameplate amperage, take the motor to
an authorized service center.