S3 0312FC, Руководство оператора

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13 Troubleshooting
When servicing the fan, switch the power OFF at
the fan disconnect switch and Lock Out and Tagged
Out this switch. Activate power only when a check
is being made. The following items will help you
pinpoint a possible malfunction of the fan unit and
explain the corrective action to take.
CAUTION: BE CAREFUL WHEN WORKING WITH
ELECTRICITY. USE A VOLTMETER TO MAKE THE
NECESSARY CHECK.
13.1
Troubleshooting Scenarios
13.1.1 Turn on toggle switch & nothing
happens.
1.
Make sure the power is available to the fan
unit.
2.
Check the motor thermostat to determine if
the thermostat is open or closed. (If the
thermostat is open, take the motor to your
local Authorized Service Centre. Make sure
the motor has time to cool, if hot.)
3.
Check the toggle switch. (If switch is
defective, replace it.)
• The toggle switch circuit should be
checked in the OFF, and ON positions.
13.1.2 The fan hums when turned on.
1. Check to make sure that all leads of your
power source have voltage present. If fan
unit is not receiving power on all leads, check
for a blown fuse, broken wire, or loose
connections.
2. If power is available at all the motor leads
and the motor still hums, then the motor
should be taken to an Authorized Service
Centre for repair or replacement.
3.
The power can be hooked directly to the
motor leads, if the motor hums, replace or
repair the motor.
13.1.3 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 Volts should operate in a
voltage range of 207 to 253 Volts.
2. Check the supply wires required for the fan
unit.
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 Centre.
13.1.4 The fan only comes up to ½ speed.
1. Take the motor to an Authorized Service
Centre for repair or replacement.