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K3G560-RA25-21
6. MAINTENANCE, MALFUNCTIONS, POSSIBLE
CAUSES AND REMEDIES
Do not perform any repairs on your device. Send the device to ebm-
papst for repair or replacement.
WARNING
Live terminals and connections even with device
switched off
Electric shock
→ Wait five minutes after disconnecting the voltage at all poles
before opening the device.
CAUTION
If control voltage or a stored speed set value is applied,
the motor will restart automatically, e.g. after a power
failure.
Risk of injury
→ Keep out of the device's danger zone.
→ When working on the device, switch off the line voltage
and ensure that it cannot be switched back on.
→ Wait until the device comes to a stop.
→ After working on the device, remove any tools 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 three hours
once a month to move the bearings and allow any condensate
that may have ingressed to evaporate.
Malfunction/fault
Possible cause
Impeller not
Imbalance in rotating
running smoothly
parts
Motor not turning
Mechanical blockage
Line voltage faulty
Faulty connection
Motor/electronics
Deficient cooling
overtemperature
Item no. 52443-5-9970 · ENU · Change 209539 · Approved 2021-02-10 · Page 12 / 14
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
6.1 Vibration testing
Checking of fan for mechanical vibration based on ISO 14694.
Recommendation: Every 6 months. Max. vibration severity is 3.5 mm/
s, measured at the motor fastening diameter on the motor support plate in
the direction of the motor axis of rotation and perpendicular to this.
Fig. 3: Example illustrating vibration measurement. The arrangement of
Possible remedy
the sensors depends on the device concerned and the installation
Clean the device;
situation.
replace it if imbalance
persists after cleaning.
6.2 Cleaning
Make sure no
weight clips are
To ensure a long service life, check the fans regularly for proper
removed during
operation and soiling. The frequency of checking is to be adapted
cleaning.
accordingly depending on the degree of soiling.
Switch off, isolate
from supply and
remove mechanical
blockage.
Check line voltage,
restore power
supply, apply control
; Dirt deposits on the motor housing can cause overheating of the motor.
signal.
; Soiling of the impeller can cause vibration that will shorten the service
Isolate from supply,
correct connection;
; Severe vibration can destroy the fan.
see connection
; In such cases, switch off the fan immediately and clean it.
diagram.
; The preferred method of cleaning is dry cleaning, e.g. using
Improve cooling. Let
the device cool down.
To reset the error
; Do not use aggressive cleaning agents!
message, switch off
the line voltage for at
least 25 s and then
switch it on again.
Ambient temperature
too high
Impermissible point of
operation
In the event of further malfunctions, contact ebm-papst.
DANGER
Risk of injury from rotating fan.
→ Only clean when not in motion. Do not disconnect the fan
from the power supply, just switch it off via the control input.
This will prevent start-up of the fan.
life of the fan.
compressed air.
NOTE
Damage to the device during cleaning
Malfunction possible
Reduce the ambient
temperature.
Reset by reducing
control input to 0.
Correct the operating
point. Let the device
cool down.
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