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Troubleshooting
Troubleshooting Guides
6-8
Model 43i Trace Level-Enhanced Instruction Manual
Table 6–4. Troubleshooting - Alarm Messages
Alarm
Possible Cause
Message
Alarm - Internal
Instrument overheating
Temp
Alarm -
Chamber temperature
Chamber Temp
below set point
Heaters have failed
Alarm - Pressure
High pressure
indication
Alarm - Flow
Flow low
Flow high
Alarm - Intensity
Low - lamp is failing
Alarm - Lamp
Low voltage (<550V) –
voltage
lamp power supply has
failed
High voltage (>1200V)
- flash lamp failed
Alarm - SO
Concentration has
2
Action
Replace fan if not operating properly.
Clean or replace foam filter, refer to the
"Preventive Maintenance" chapter in this
manual.
Check 10K thermistor on measurement interface
board, replace if bad.
Check 10K thermistor, replace if bad.
Check temperature control board to insure the
LEDs are coming on. If not, temperature control
board could be defective.
Check connector pins for continuity.
Check plumbing for leaks.
Check the pump for a tear in the diaphragm,
replace with pump repair kit if necessary.
Refer to the "Preventive Maintenance" chapter in
this manual.
Check that capillary is properly installed and O-
rings are in good shape. Replace if necessary.
Check sample capillary for blockage. Replace as
necessary.
If using sample particulate filter make sure it is
not blocked. Disconnect sample particulate filter
from the sample bulkhead, if flow increases,
replace the filter.
Perform leak test to check for internal leaks.
When delivering zero air or gas to the
instrument, use an atmospheric dump.
Check that the lamp and trigger pak are securely
fastened.
Replace lamp.
Replace the lamp power supply.
Replace the flash lamp.
Check to insure range corresponds with expected
Thermo Fisher Scientific
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Troubleshooting
