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S4D300-AP28-30
4.5 Checking the connections
⇒ Make sure that the power is off (all phases).
⇒ Secure it from being switched on again.
⇒ Check the correct fit of the connection lines.
4.6 Switching on the device
WARNING
Hot motor housing
Fire hazard
→ Ensure that no combustible or flammable materials are
located close to the fan.
Inspect the device for visible external damage and the proper function of
the protective features before switching it on.
⇒ Apply the nominal voltage to the voltage supply.
4.7 Switching off the device
⇒ Disconnect the device from the supply voltage.
Item no.: 10561-5-9970 · Revision status: KM68158 · Print-out on 27.04.10 · Created by Y. Uhlmann (VM-TDO) · Page 8 of 9
ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · 74673 Mulfingen · Phone: +49 7938 81-0 · Fax: +49 7938 81-110 · www.ebmpapst.com · info1@de.ebmpapst.com
Operating instructions
5. MAINTENANCE, MALFUNCTIONS, POSSIBLE
CAUSES AND REMEDIES
Do not perform any repairs on your device. Return the device to ebm-
papst for repair or replacement.
Malfunction/error
Motor does not turn
Impeller running
roughly
Overtemperature of
motor
5.1 Cleaning
WARNING
Terminals and connections have voltage even with a
unit that is shut off
Electric shock
→ Wait for five minutes after disconnecting the voltage at all
poles before touching the unit.
CAUTION
The motor restarts automatically when operating voltage
is applied, e.g. after a power failure.
Danger of injury
→ Keep out of the danger zone of the device.
→ When working on the device, switch off the mains
supply voltage and secure the latter from being switched on
again.
→ Wait until the device stops.
If the device remains out of use for some time, e.g. when in
storage, we recommend switching the device on for at least 2
hours to allow any condensate to evaporate and to move the
bearings.
Possible cause
Mechanical blockage
Mains supply voltage
faulty
Faulty connection
Imbalance in rotating
parts
Ambient temperature
too high
Unacceptable
operating point
Insufficient cooling
If you have any other problems, contact ebm-papst.
NOTE
Damage to the device during cleaning.
Malfunction possible
→ Do not clean the device using a water jet or high-pressure
washer.
→ Do not use any cleaners containing acids,
bases or solvents.
Possible remedy
Switch off, de-
energise, and remove
mechanical blockage
Check mains supply
voltage, restore power
supply
Correct connection,
see connection diagram
Clean the device, if
imbalance still evident
after cleaning, replace
device
Lower ambient
temperature if possible
Check operating point
Improve cooling
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