Operating instructions
A4D450-AU01-02
Translation of the original 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.
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
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.
→ Insert the brought-out thermal overload protector into the
control circuit so that the cooled off motor does not switch on
independently after a fault.
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
Insufficient cooling
Improve cooling
If you have any other problems, contact ebm-papst.
5.1 Cleaning
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.
→ Do not use any pointed or sharp-edged objects to clean.
5.2 Safety test
What has to
be tested?
How to test?
Frequency
Which
measure?
Check the
protective
casing against
accidental
contact for
damage and to
ensure that it is
intact
Visual inspection At least every
6 months
Repair or
replacement of
the device
Check the
device for
damage to
blades and
housing
Visual inspection At least every
6 months
Replacement
of the device
Mounting the
connection lines
Visual inspection At least every
6 months
Fasten
Check the
insulation of
the wires for
damage
Visual inspection At least every
6 months
Replace wires
Tightness of
screwed cable
gland
Visual inspection At least every
6 months
Retighten,
replace if
damaged
Condensate
discharge
holes for
clogging, as
necessary
Visual inspection At least every
6 months
Open bore holes
Weld seams
for crack
formation
Visual inspection At least every
6 months
Replace device
Item no. 11391-5-9970 · ENG · Revision 83823 · Release 2015-02-24 · Page 10 / 10
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
