Operating instructions
W2E250-HQ52-12
Translation of the original operating instructions
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.
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
;
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.
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.
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.
Malfunction/error
Possible cause
Possible remedy
Impeller running
roughly
Imbalance in rotating
parts
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.
Motor does not turn
Mechanical blockage
Switch off, de-
energise, and
remove mechanical
blockage.
Mains supply voltage
faulty
Check mains supply
voltage,
restore power
supply.
Faulty connection
De-energise, correct
connection, see
connection diagram.
Thermal overload
protector responded
Allow motor to cool
off, locate and rectify
cause of error, if
necessary cancel
restart lock-out
Unacceptable
operating point
Check operating point
Overtemperature of
motor
Ambient temperature
too high
Lower ambient
temperature if possible
Item no. 14252-5-9970 · ENG · Revision 238441 · Release 2021-10-01 · 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
