Operating Instructions – Labmaster
©
130 and MB20G Systems
Instruction Manual
Chapter 10: Maintenance & Troubleshooting
© MBraun, Inc. Edition 1/2007 Page 10-14
Blower GB1: Motor Protective Switch Activated
The blower has exceeded current draw limit. Possible reasons for failure are:
• The filter(s) is clogged;
• The blower is drawing too much amperage;
• A power outage or power surge;
• System restart;
• The blower is defective.
Check the inlet and outlet filters inside the
glovebox. Replace or clean as needed.
Did this fix the problem?
Yes – continue normal operation
No – proceed to the next step.
Open the electrical cabinet and check the F3
breaker. Reset it if it is blown.
Did this fix the problem?
Yes – continue normal operation
No – proceed to the next step.
Deactivate circulation via the Functions menu.
Push the Fn button on the frequency converter
to reset it. Reactivate circulation.
Did this fix the problem?
Yes – continue normal operation
No – contact the M.Braun Service Department.
Box Pressure Too Low
Vacuum Pump VPG1 Switched Off
The glovebox pressure has dropped to a level below -15mbar. Possible reasons for failure are:
• The antechamber evacuation valve is open and the inner door is not sealed properly;
• An open auxiliary vacuum source inside the glovebox not controlled by the PLC.
Turn the antechamber evacuation valves to the
closed position. Verify the inner door is sealed
completely.
Did this fix the problem?
Yes – continue normal operation
No – proceed to the next step.
Check auxiliary vacuum sources located within
the glovebox. Ensure all seals are seated
properly and securely. Fix the connections as
needed.
Did this fix the problem?
Yes – continue normal operation
No – contact the M.Braun Service Department.
Box Pressure Too High
The glovebox pressure has risen to a level above +15mbar. Possible reasons for failure are:
• Entering the glovebox, using the gloves, too quickly;
• Upper working setpoint parameter is too close to the upper working limit;
• Auxiliary gas supply is open.
Check the upper working setpoint parameter.
Adjust as necessary to a limit of 10mbar or
below.
Did this fix the problem?
Yes – continue normal operation
No – proceed to the next step.
Turn off any unused auxiliary gas supply.
Did this fix the problem?
Yes – continue normal operation
No – contact the M.Braun Service Department.
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