Operating Instructions – Labmaster
©
130 and MB20G Systems
Instruction Manual
Chapter 10: Maintenance & Troubleshooting
© MBraun, Inc. Edition 1/2007 Page 10-15
Sensor Box Pressure Defective
The main pressure sensor for the system has failed causing circulation, analyzers, gas in and
gas out to be deactivated. Contact the M.Braun Service Department to obtain a replacement
sensor.
O2 or H2O Sensor Defective
The oxygen or moisture analyzer is not displaying a numerical reading on the PLC screen.
Possible reasons for failure are:
• The cable is damaged;
• The RJ45 connector is not inserted correctly;
• The sensor head is damaged or defective.
Check the RJ45 connector to ensure it is
plugged into the analyzer properly. Adjust as
necessary.
Did this fix the problem?
Yes – continue normal operation
No – proceed to the next step.
Unplug the RJ45 connector. Inspect the cable
and plug for damage. Reinsert the connector
back into the analyzer.
Did this fix the problem?
Yes – continue normal operation
No – contact the M.Braun Service Department.
Freezer Motor Protective Switch Activated
Box Cooling Motor Protective Switch Activated
The compressor used to operate the freezer or box cooling unit has exceeded current draw
limit. Possible reasons for failure are:
• The compressor is drawing too much amperage;
• A power outage or power surge;
• System restart;
• The compressor is defective.
Open the electrical cabinet and check the F7
breaker (freezer) or F8 breaker (box cooling).
Reset it if it is blown.
Did this fix the problem?
Yes – continue normal operation
No – contact the M.Braun Service Department.
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