Troubleshooting; Troubleshooting Chart For Recorder Unit - GE B30 Technical Reference Manual

7

Troubleshooting

7.1 Troubleshooting chart for recorder unit

Problem
Module not responding to front panel
key, but operates through Recorder
menu.
Recorder will not start.
No error messages shown.
Recorder works but nothing appears
on the paper.
7.2 Troubleshooting chart for CO
Problem
No response to breathing
'SENSOR INOP.' message
'ZEROING ERROR' message
'CHECK D-FEND' message
Cause
Membrane switch cable loose or
broken.
Recorder: Module not properly
inserted.
Recorder: Flex-strip cable broken.
Recorder board faulty.
Recorder unit faulty.
Active side of the paper downwards. Turn the paper roll over.
Recorder unit faulty.
Cause/What to do
Sampling line or water trap blocked or loose, or improperly attached.
Water trap container full.
See the gas sampling system troubleshooting.
The temperature is too low or high, check the temperature in the service
menu. Supply voltage is too low or high, IR source current or voltage is
too low or high, check current in the service menu.
Pump is not working properly, check sample flow and pump voltage in
the service menu.
Ambient pressure too low or high, check the ambient pressure in the
service menu.
Zero valve not working properly, check the functionality by switching
zero valve on and off in the service menu.
Gas zeroing failed. Condensation or residual gases are affecting the zero
measurement. Allow the module to run drawing room air for half an hour
and calibrate again.
Amb – Work pressure difference too small.
Probably water trap or the sampling line is not attached properly. Gas
zero valve failure. Pump failure or gas outlet blockage.
What to do
Check the cable. Replace the
front panel if necessary.
Re-insert the module properly.
Check the cable. Replace if
necessary.
Replace the recorder board.
Replace the recorder unit.
To test which side is active:
Place the paper on a hard
surface and draw a line with a
fingernail - a dark line will
appear on the active (thermal)
side.
Replace the recorder unit.
measurement
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Document no. 2044677-001
Troubleshooting
8-29