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Page 33 of 40
Bulletin
441G
E.
SYMPTOM: The fan starts and operates for a while and then shuts off.
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 to 253 Volts.
2.
Check the supply wire sizes required for the fan unit,
Page 19
.
3.
Check the load on the main circuit to make sure other items on the main
circuit 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.
F.
SYMPTOM: Fan operates when main power supply is turned on.
1.
The top two terminals of the toggle switch should be checked. If the
circuit is closed between the two terminals, the toggle switch should be
replaced.
2.
Check the contact points by removing the front from the contactor to see
if the contacts are locked in or welded in place. If so, the complete
contactor should be replaced.
Summary of Contents for Caldwell AF12-751
Page 2: ...Page 2 of 40 Bulletin 441G ...
Page 23: ...Page 23 of 40 Bulletin 441G Figure 16 Wiring Schematic for AF12 751 Fan ...
Page 24: ...Page 24 of 40 Bulletin 441G Figure 17 Wiring Schematic for AF18 11 Fan ...
Page 25: ...Page 25 of 40 Bulletin 441G Figure 18 Wiring Schematic for 230 Volt Single Phase Axial Fan ...
Page 26: ...Page 26 of 40 Bulletin 441G Figure 19 Wiring Schematic for 230 Volt Three Phase Axial Fan ...
Page 27: ...Page 27 of 40 Bulletin 441G Figure 20 Wiring Schematic for 460 Volt Three Phase Axial Fan ...
Page 38: ...Page 38 of 40 Bulletin 441G NOTES ...
Page 39: ...Page 39 of 40 Bulletin 441G NOTES ...
Page 40: ...Page 40 of 40 Bulletin 441G ...