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R3G250-AT39-71
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
The device is not to be switched on until it has been installed properly
and in accordance with its intended use, including the required protective
devices and professional electrical connection. This also applies to
devices which have already been equipped with plugs and terminals or
similar connectors by the customer.
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.
; Start the device by changing the input signal.
NOTE
Damage to device by vibrations
Bearing damage, reduced service life
→ The fan must operate free of vibrations throughout its speed
control range. #Strong vibrations can result from improper
handling, imbalance resulting from damage during transport,
or component-induced or structural resonances. #When
putting the fan into service, determine the speed ranges with
excessive vibration levels and also any resonance
frequencies that may be present. #When regulating the
speed, pass through resonance ranges as quickly as
possible or find another remedy.# Operation at excessive
vibration levels can lead to premature failure.
4.7 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 work:
; 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 supply voltage.
; When disconnecting, be sure to disconnect the earth wire connection
last.
Item no. 50237-5-9970 · ENG · Revision 90396 · Release 2016-09-21 · Page 9 / 11
ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone +49 (0) 7938 81-0 · Fax +49 (0) 7938 81-110 · info1@de.ebmpapst.com · www.ebmpapst.com
Operating instructions
5. INTEGRATED PROTECTIVE FUNCTIONS
The integrated protective functions cause the motor to switch off
automatically in case of faults described in the table.
Malfunctions
Rotor position detection error
Locked rotor
Line under-voltage (mains input
voltage outside of permitted
nominal voltage)
6. 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
Description / Function of
safety feature
An automatic restart occurs.
; After the blockage is
removed, the motor restarts
automatically.
; If the mains supply voltage
returns to permitted values, the
motor restarts automatically.
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
If control voltage is applied or a speed setpoint is stored,
the motor will restart automatically, e.g. after power
failure.
Risk of injury
→ Keep out of the device danger zone.# When working on the
device, switch off the mains power and ensure that it cannot
be switched back on.
→ After working on the device, remove any tools used or
other objects from the device.
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
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,
apply control signal.
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