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W4E400-CP02-31
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 Switch on 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.
; Check the air flow paths of the fan for foreign objects and remove any
that are found.
; Apply the nominal voltage to the voltage supply.
4.7 Switching off the device
; Disconnect the device from the supply voltage at the main switch for
the supply line.
; When disconnecting, be sure to disconnect the earth wire connection
last.
Item no.: 12155-5-9970 · Revision: 76115 · Print-out: 2012-02-17 · Y. Uhlmann (VM-TDO) · Page 8 / 9
ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone +49 7938 81-0 · Fax +49 7938 81-110 · info1@de.ebmpapst.com · www.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
Impeller running
roughly
Motor does not turn
WARNING
Terminals and connections have voltage even with a
unit that is shut off
Electric shock
→ Wait five minutes after disconnecting the voltage at all poles
before opening the device.
CAUTION
Electrical load on the capacitor after device is switched off
Electric shock, risk of injury
→ Discharge the capacitors before working on the device.
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
two hours to allow any condensate to evaporate and to move
the bearings.
Possible cause
Imbalance in rotating
parts
Mechanical blockage
Mains supply
voltage faulty
Faulty connection
Thermal overload
protector responded
Possible remedy
Clean the device; if
imbalance is still
evident after
cleaning, replace the
device.
If you have
attached any weight
clips during cleaning,
make sure to
remove them
afterwards.
Switch off, de-
energise, and
remove mechanical
blockage.
Check mains supply
voltage,
restore power
supply.
De-energise, correct
connection, see
connection diagram.
Allow motor to cool
off, locate and rectify
cause of error, if
necessary cancel
restart lock-out
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