Operating instructions
K3G280-PR04-I5
Translation of the original operating instructions
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.
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 a mains
failure.
Risk of injury
→ Keep out of the device hazard zone.
→ When working on the device, switch off the mains power
and ensure that it cannot be switched back on.
→ Wait until the device stops.
→ After working on the device, remove any tools used or
other objects from the device.
NOTE
If the device is not operated for a lengthy period in installed
condition in a dry environment, it is to be started up and
operated at full speed for one hour at least every four months. If
the device is not operated for a lengthy period in installed
condition in a damp environment (e.g. outdoors), it is to be
started up and operated at full speed for at least two hours once
a month to move the bearings and allow any condensate that
may have ingressed to evaporate.
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,
apply control signal.
Faulty connection
De-energise, correct
connection, see
connection diagram.
Overtemperature of
electronics/motor
Insufficient cooling
Improve cooling. Let
the device cool down.
To reset the error
message, switch off
the mains supply
voltage for a min. of
25 s and switch it on
again.
Thermal overload
protector responded
Allow motor to cool
off, locate and rectify
cause of error, if
necessary cancel
restart lock-out
Ambient temperature
too high
Reduce the ambient
temperature.
Reset by reducing
control input to 0.
Unacceptable
operating point
Correct the operating
point. Let the device
cool down.
If you have any other problems, contact ebm-papst.
6.1 Vibration test
Checking the fan for mechanical vibrations based on ISO 14694.
Recommendation: every 6 months. Maximum vibration severity is 3.5
mm/s measured at the motor’s fastening diameter on the motor support
plate towards and perpendicular to the motor’s axis of rotation.
Fig. 4: Example showing vibration measurement. Positioning of the
sensors will vary depending on the device and the circumstances of
installation.
6.2 Cleaning
NOTE
Damage to the device during cleaning
Malfunction possible
→ Do not use a high-pressure cleaner to clean the device.# Do
not use any acid, alkali or solvent-based cleaning agents.
→ Do not use any pointed or sharp-edged objects for cleaning
Item no. 54780-5-9970 · ENG · Revision 202174 · Release 2018-12-28 · Page 11 / 12
ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone +49 (0) 7938 81-0 · Fax +49 (0) 7938 81-110 · [email protected] · www.ebmpapst.com