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K3G280-RR03-M4
Siemens AG PD LD Nbg.
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.
If the device is out of use for some time, e.g. when in storage,
we recommend switching it on for at least two hours to allow
any condensation to evaporate and to move the bearings.
Malfunction/fault
Possible cause
Impeller not
Imbalance in rotating
running smoothly
parts
Motor not turning
Mechanical blockage
Line voltage faulty
Faulty connection
Broken motor winding Replace device
Thermal overload
protector activated
Item no. 55771-5-9970 · ENU · Change 94605 · Approved 2017-09-29 · Page 11 / 13
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
Possible remedy
Clean the device;
replace it if imbalance
persists after cleaning.
Make sure no
weight clips are
removed during
cleaning.
Switch off, isolate
from supply and
remove mechanical
blockage.
Check line voltage,
restore power supply.
Attention! The error
message resets
automatically.
Device restarts
6.1 Vibration testing
automatically without
Checking of fan for mechanical vibration based on ISO 14694.
warning.
Recommendation: Every 6 months. Max. vibration severity is 3.5 mm/
Isolate from supply,
s, measured at the motor fastening diameter on the motor support plate in
correct connection;
the direction of the motor axis of rotation and perpendicular to this.
see connection
diagram.
Allow motor to cool
off, locate and rectify
cause of error,
release restart lockout
if necessary
Deficient cooling
Ambient temperature
too high
Impermissible point of
operation (e.g. back
pressure too high)
In the event of further malfunctions, contact ebm-papst.
Improve cooling. Let
the device cool down.
To reset the error
message, switch off
the line voltage for at
least 25 s and then
switch it on again.
Alternatively, reset
the error message by
applying a control
signal of < 0.5 V to
Din1 or by shorting
Din1 to GND.
Reduce the ambient
temperature. Let the
device cool down.
To reset the error
message, switch off
the line voltage for at
least 25 s and then
switch it on again.
Alternatively, reset
the error message by
applying a control
signal of < 0.5 V to
Din1 or by shorting
Din1 to GND.
Correct the operating
point. Let the device
cool down.
To reset the error
message, switch off
the line voltage for at
least 25 s and then
switch it on again.
Alternatively, reset
the error message by
applying a control
signal of < 0.5 V to
Din1 or by shorting
Din1 to GND.
275
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