ebm-papst AF1250-001, Operating Instructions Manual, Page: 10 / 12

Part Number
Operating Instructions
Item no. LS-122. Revision 002 Release 18/02/2016 Page 10 of 12
ebm-papst A&NZ Pty Ltd
10 Oxford Road · Laverton North VIC 3026 · Phone +61 (03) 9360 6400 · Fax +61 (03) 9360 6464
ABN 33 115 927 556 NSW Phone +61 (02) 9827 6400 · NSW Fax +61 (02) 9827 6464 · NZ Phone +64 (09) 525 0245 · NZ Fax +64 (09) 525 0246
sales@ebmpapst.com.au · www.ebmpapst.com.au
AF1250-001
AFFB1250-00
4.6 Checking connections

Ensure isolation from supply (all phases).
 Make sure a restart is impossible.

Check the cables for proper fit.
 Screw the terminal box cover back on again. Terminal box
tightening torque, see chapter 3.1 Product drawing.
 Route the cables in the terminal box so that the terminal box
cover closes without resistance.
 Use all plug screws. Insert the screws by hand to avoid
damage to the threads.
 Make sure that the terminal box is completely closed and
sealed and that all screws and cable glands have been
property tightened.
4.7 Switching on the device
The device may only be switched on if it has been installed
properly and in accordance with its intended use, including the
required safety mechanisms and professional electrical hook up.
This also applies for devices which have already been equipped
with plugs and terminals or similar connectors by the customer.
WARNING
Hot motor housing
Risk of fire
→ Ensure that no combustible or flammable
materials are located close to the fan.

Before switching on, check the device for visible external
damage and make sure the protective devices are
functional.
 Check the fan’s air flow paths for foreign matter and remove
any foreign matter found.
 Apply the nominal supply voltage.

Start the device by changing the input signal.
4.8 Switching off the device
Switching off the device during operation:
 Switch off the device via the control input.

Do not switch the motor (e.g. in cyclic operation) on and off
via power supply.
Switching off the device for maintenance:
 Switch off the device via the control input.

Do not switch the motor (e.g. in cyclic operation) on and off
via power supply.

Disconnect the device from the power supply.

When disconnecting, be sure to disconnect the ground
connection last.
5. INTEGRATED PROTECTIVE FEATURES
The integrated protective functions cause the motor to switch off
automatically in the event of the faults described in the table.
Fault Safety features
description/function
Rotor position detection
error
An automatic restart follows.
Blocked rotor  After the blockage is
removed, the motor restarts
automatically.
Line under voltage (line
voltage outside of permitted
nominal voltage range)
 If the line voltage returns to
permitted values, the motor
restarts automatically.
Phase failure A phase of the supply voltage
fails for at least 5 s.
 When all phases are
correctly supplied again, the
motor automatically restarts
after
10–40 s.