Operating instructions
K3G450-PA31-03
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.
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
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.
6.1.1 Warning codes
Number of pulses
Motor status - LED
orange
Message at status
relay
1
Current limitation in
action
2
Line impedance too
high (DC-link voltage
unstable)
3
Power limiter in action
4
Output stage
temperature high
5
Motor temperature high
6
Temperature inside
electronics high
7
DC-link voltage low
8
Braking mode: set in
case of external drive
in opposite direction
at high speed for
lengthy period
Yes
9
Calibration of rotor
position sensor in
progress
Yes
10
Actual speed is lower
than run monitoring
speed limit
Yes
11
Open circuit at analog
input or PWM input
for the set value
Yes
13
DC-link voltage high
15
Line voltage high
16
Shake-loose function
activated
Item no. 55781-5-9970 · ENU · Change 260705 · Approved 2022-09-01 · Page 14 / 16
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
