11 | Troubleshooting
36 | 44
Instruction Manual COBRA NC 0400 B WCV_EN_en
11
Troubleshooting
DANGER
Live wires.
Risk of electrical shock.
●
Electrical installation work must only be executed by qualified personnel.
CAUTION
Hot surface.
Risk of burns!
●
Prior to any action requiring touching the machine, let the machine cool down first.
Problem
Possible Cause
Remedy
The machine does not start.
The motor is not supplied with
the correct voltage.
●
Check the power supply.
The rotors are jammed or
seized.
●
Turn the screw rotors
manually from the rotor
access plug (PMR).
●
Repair the machine (contact
Busch).
Solid foreign matter has
entered the machine.
●
Remove the solid foreign
matter or repair the
machine (contact Busch).
●
Install an inlet filter if
necessary.
A temperature sensor has
reached the switch point.
●
Let the machine cool down.
●
See problem “The machine
runs too hot”.
Corrosion in the machine from
remaining condensate.
●
Repair the machine.
●
Check the process and
follow the recommendation
in case of
The motor is defective.
●
Replace the motor.
