Troubleshooting
WARNING
Risk of electrical shock, risk of damage to equipment.
Electrical installation work must only be executed by qualified personnel that knows and observes the following regulations:
- IEC 364 or CENELEC HD 384 or DIN VDE 0100, respectively,
- IEC-Report 664 or DIN VDE 0110,
- BGV A2 (VBG 4) or equivalent national accident prevention regulation.
CAUTION
During operation the surface of the vacuum pump may reach temperatures of more than 90 °C.
Risk of burns!
Let the vacuum pump cool down prior to a required contact or wear heat protection gloves.
Problem
Possible Cause
Remedy
The vacuum pump does not reach the usual
pressure
The vacuum system or suction line is not
leak-tight
Check the hose or pipe connections for possible
leak
Evacuation of the system takes too long
In case a mesh screen is installed on the suction
connection:
The mesh screen on the suction connection is
partly clogged
Clean the mesh screen
If cleaning is required too frequently install a
filter upstream
In case an inlet filter is installed on the suction
connection:
The filter on the suction connection is partly
clogged
Clean or replace the inlet filter, respectively
Partial clogging in the suction, discharge or
pressure line
Remove the clogging
Long suction, discharge or pressure line with
too small diameter
Use larger diameter
Internal parts worn or damaged
Repair the vacuum pump (Busch service)
The vacuum pump does not start
The drive motor is not supplied with the correct
voltage or is overloaded
Supply the drive motor with the correct voltage
The drive motor starter overload protection is
too small or trip level is too low
Compare the trip level of the drive motor starter
overload protection with the data on the name-
plate
Correct if necessary
In case of high ambient temperature:
Set the trip level of the drive motor starter
overload protection 5 percent above the no-
minal drive motor current
One of the fuses has blown
Check the fuses
The connection cable is too small or too long
causing a voltage drop at the vacuum pump
Use sufficiently dimensioned cable
The vacuum pump or the drive motor is blocked Make sure the drive motor is disconnected from
the power supply
Remove the fan cover
Try to turn the fan by hand
If the unit vacuum pump/drive motor is still
frozen:
Remove the drive motor and check the drive
motor and the vacuum pump separately
If the vacuum pump is blocked:
Repair the vacuum pump (Busch service)
The drive motor is defective
Replace the drive motor (Busch service)
Troubleshooting
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Summary of Contents for COBRA AC 1000 F
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