Operating instructions
K3G500-PB24-03
Translation of the original operating instructions
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 over four months, we recommend
switching it on for at least three hours at full speed to allow any
condensation to evaporate and to move the bearings.
Malfunction/fault
Possible cause
Possible remedy
Impeller not
running smoothly
Imbalance in rotating
parts
Clean the device;
replace it if imbalance
persists after cleaning.
Make sure no
weight clips are
removed during
cleaning.
Motor not turning
Mechanical blockage
Switch off, isolate
from supply and
remove mechanical
blockage.
Line voltage faulty
Check line voltage,
restore power supply.
Attention! The error
message resets
automatically.
Device restarts
automatically without
warning.
Faulty connection
Isolate from supply,
correct connection;
see connection
diagram.
Broken motor winding Replace device
Inadequate cooling
Improve cooling.
Allow the device to
cool down.
Ambient temperature
too high
Reduce the ambient
temperature. Allow
the device to cool
down.
Impermissible
operating point (e.g.
back pressure too
high)
Correct the operating
point. Allow the
device to cool down.
In the event of further malfunctions, contact ebm-papst.
6.1 Warning/status codes
The LED on the electronics housing shows the motor status with various
colors and flash codes. The flash codes have a frequency of 2 Hz.
Each flash code is followed by a pause lasting 3 seconds. The following
colors are used: Green: no warning or fault. Orange: There is a warning.
No user intervention is required for warnings. Red: There is at least one
error. See the following table. If there are multiple simultaneous errors,
their associated flash codes are displayed in succession. If there are
simultaneous warnings and errors, only the errors are displayed.
Number of
pulses
Motor
status -
LED red
Manual
reset
required
Possible
cause
Possible
remedy
1
Phase
failure or
line
undervoltage
no
Missing
phase
Poor grid
quality
Check line
voltage
3
Output
stage
overheating.
yes
Dirty
electronics
housing.
Improve
cooling.
4
Communication
error
between
master
controller
and slave
controller
no
External
supply
applied via
Vout for
setting
parameters.
Internal
error.
Switch off
line voltage
- wait
- switch
back on.
6
Motor
overheating
yes
Ambient
temperature
too high.
Impermissible
operating
point.
Lower the
ambient
temperature.
Correct
the
operating
point.
7
Hall sensor
fault
yes
Internal error Switch off
line voltage
- wait
- switch
back on.
8
Motor
blocked
no
Mechanical
blockage
Switch off
- Verify
isolation
from supply
- Check
rotor
freedom of
movement.
9
Speed limit
exceeded
no
-
-
Item no. 55783-5-9970 · ENU · Change 99204 · Approved 2018-08-01 · 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 · [email protected] · www.ebmpapst.com
