ebmpapst Denmark ApS, Vallensbaekvej 21, 2605 Broendby
+45 4363 1111
2019.08.01 – page 12
5.3 Troubleshooting
49 The integrated protection features cause the motor to shut down automatically in the case of errors described
below:
Malfunction
Possible cause
Possible solution
Motor not running
Mechanical blocking
Turn off, disconnect, and remove the
mechanical blockage. Reset by
disconnecting the power supply for at
least 20 seconds after the motor comes
to a stand-still.
Voltage failure
Check voltage
Restore supply
Connect control signal
Connection error
Correct connection. See connection
diagram. Reset by disconnecting the
power supply for at least 20 seconds
after the motor comes to a stand-still
Thermal overload
Protection active
Let the unit cool off. Reset by
disconnecting the power supply for at
least 20 seconds after the motor comes
to a stand-still
High electronic temp
Insufficient cooling
Improve cooling if possible. Reset by
disconnecting the power supply for at
least 20 seconds after the motor comes
to a stand-still
High operating temperature
Lower temp. if possible
Reset by reducing control signal to 0
VDC
Impeller runs unevenly
Imbalance in rotating parts
Clean the unit and balance it properly.
If imbalance Is still present, the unit is
replaced.
50 The machine cannot be repaired. Only original part is the fan.
Therefore, return the unit to ebm-papst for repair or replacement.
51
WARNING
Terminals and connections have voltage even when the device is turned off.
Electrical shock.
Wait for 5 minutes after disconnection all connections before touching the unit.
52
WARNING
The machine is equipped with several electronic systems designed to protect the motor from overheating.
These systems do NOT protect against accidental start. For manual intervention, service and repair switch must
therefore be used.
53
ATTENTION
If the control signal is connected or a setpoint is stored, the motor will automatically restart, e.g. after a power
failure. Risk of injury.
Stay outside the unit’s danger zone.
When working on the unit, the supply voltage must be disconnected and it must be ensured that it does not
connect again.
Wait for the unit to stop.
54 If the unit has not been used for an extended period of time, we recommend turning on the unit at least 2 hours
before using it to remove any condensate, as well as moving the bearings.