850
Faults
Fault 200—Pneumatics shutdown: faulty pneumatics board
Status message: Pneu board FPGA
The pneumatics control board is unable to control the instrument’s
pneumatics.
The pneumatics control board is not functioning properly and will need
to be replaced.
Fault 201—Pneumatics shutdown: faulty pneumatics board
Status message: Pneumatics board
The pneumatics control board is not functioning properly for a non-specific
reason.
The pneumatics control board will need to be replaced.
Fault 202—Hydrogen safety shutdown
Status message: Hydrogen shutdown
An inlet configured for hydrogen gas did not reach the pressure setpoint
within 2 minutes. Because hydrogen presents an explosion hazard, the
following occurred:The GC oven fan and heaters are turned off.
Jun 2001
The oven flaps are fully opened.
Both pressure and flow controls are turned off and the control
parameters are flashing when viewed.
The small zone heaters for inlets and detectors are turned off and the
control parameters are flashing when viewed.
The warning beep continues until the [Clear] key on the keypad is
depressed.
The oven cannot be turned on unless the instrument is power failed. Turn
the GC power off and on again to restore operation.
Error Codes and Internal Diagnostics
Agilent 6890 Gas Chromatograph Service Manual
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Faults
Fault 203—Signal DSP faulty
The sequence would continue until the fault is fixed. To find the fault, check
for the following possible causes:
Check the gas supply pressure. Increase the pressure at the initial supply
if it is too low to reach the setpoint.
Check for a leak somewhere in the system. Leak test the gas supply tubing,
the inlet, and the inlet column fittings. Leak test procedures are found
with each inlet section.
The column may be broken. Use the leak detector to check the column
for leaks and replace the broken column or break off the cracked portion.
An inlet proportional control valve may be stuck open or closed because
of contamination or other fault. Contact your Agilent Technologies
service representative.
Fault 203—Signal DSP faulty
Status message: Signal DSP faulty
The detector’s signal processing electronics are not functioning correctly.
This indicates a malfunction with the 6890 GC main PC board. The signal
path will not function.
Turn the instrument on and then off at least one time. If the error still
occurs, the mainboard must be replaced.
Fault 204—Signal DSP ROM broken
Status message: Sig DSP ROM broken
The detector’s signal processing electronics are not functioning correctly.
This indicates a malfunction with the 6890 GC main PC board. The signal
path will not function.
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Turn the instrument on and then off at least one time. If the error still
occurs, the mainboard must be replaced.
Error Codes and Internal Diagnostics
Agilent 6890 Gas Chromatograph Service Manual
Jun 2001
Faults
Fault 205—Signal DSP RAM broken
850
Fault 205—Signal DSP RAM broken
Status message: Sig DSP RAM broken
The detector’s signal processing electronics are not functioning correctly.
This indicates a malfunction with the 6890 GC main PC board. The signal
path will not function.
Turn the instrument on and then off at least one time. If the error still
occurs, the mainboard must be replaced.
Fault 206—Signal DSP registers
Status message: Sig DSP registers
The detector’s signal processing electronics are not functioning correctly.
This indicates a malfunction with the 6890 GC main PC board. The signal
path will not function.
Turn the instrument on and then off at least one time. If the error still
occurs, the mainboard must be replaced.
Fault 207—Sig DSP data corrupt
Status message: Sig DSP data corrupt
The detector’s signal processing electronics are not functioning correctly.
This indicates a malfunction with the 6890 GC main PC board.
Jun 2001
Turn the instrument on and then off at least one time. If the error still
occurs, the mainboard must be replaced.
Error Codes and Internal Diagnostics
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Faults
Fault 208—Signal path test failed
Fault 208—Signal path test failed
Fault 209—Signal path test failed
Status message: 0-1 mV out # 1 or 0-1 mV out # 2
This error indicates that the signal that the 6890 GC is sending to a stripchart recording device in position 1 or 2 is not within the acceptable
range. The 6890 GC will not be ready.
Turn the instrument on and then off at least one time. If the error still
occurs, the mainboard must be replaced.
Fault 210—Signal path test failed
Fault 211—Signal path test failed
Status message: Analog out # 1 or Analog out # 2
This error indicates that the signal that the 6890 GC is sending to an integrator
in position 1 or 2 is not within the acceptable range. The 6890 GC will not be
ready
Turn the instrument on and then off at least one time. If the error still
occurs, the mainboard must be replaced.
Fault 212—Front detector electrometer out of specification
Fault 213—Back detector electrometer out of specification
Status message: F det electrometer or B det electrometer
The FID, NPD, TCD, and ECD all have an electrometer. The electrometer,
which is inside the detector, measures and amplifies the signal from the
detector, which it then converts to a digital form. Two things could cause the
detector electrometer to be out of specification:
•
•
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The communication cable between the FID, NPD, or ECD detector board
and the detector is not connected properly.
The electrometer is broken, or the detector board is bad.
Error Codes and Internal Diagnostics
Agilent 6890 Gas Chromatograph Service Manual
Jun 2001
Faults
Fault 214—Front detector flame out
850
If the electrometer is out of specification, the detector will never reach a ready
state.
Check that the cable that connects the detector to the board is connected
properly.
If the boards are connected properly but the electrometer is still out of
specification, the electrometer or detector board is broken.
Fault 214—Front detector flame out
Fault 215—Back detector flame out
Status message: Front det flame out or Back det flame out
This message appears when the FID is not able to ignite or if the flame goes
out during a run. During the ignition process or the run, the detector will try
to ignite the flame twice; if both attempts fail, the hydrogen, air, and ignitor
will shut off, and the error message will appear. The detector will be in a not
ready state.
Check the following:
Make sure the hydrogen and air are turned on and that the flow rates are
high enough for the flame to ignite.
Use an electronic leak detector to search for and correct leaks around
the detector column fitting.
Check that you are using the correct jet for your column.
Change the Lit Offset to 0.5 (the default value).
Fault 216—Front TCD filament open
Fault 217—Back TCD filament open
Status message: F TCD filament open or B TCD filament open
The TCD filament bridge voltage indicates that the filament resistance is too
high. The resistance may be too high because the filament is broken or worn
thin from use, or the wires from the TCD are not connected on the detector
Jun 2001
Error Codes and Internal Diagnostics
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Faults
Fault 218—F TCD filament shorted
board, or the ∆PRT is shorted. (Units made before April 1997 may not use a
∆PRT.)
The detector will not be ready until the condition is corrected.
Check that the wires from the detector are connected on the detector
board.
Check that the ∆PRT is properly installed and not damaged. Replace if
damaged.
The TCD’s cell must be replaced.
Fault 218—F TCD filament shorted
Fault 219—B TCD filament shorted
Status message: F TCD filament short or B TCD filament short
The TCD filament bridge voltage indicates that the resistance of the filament
is too low, which indicates a potentially shorted filament. This condition could
be caused by a worn or sagging filament, or if the wires from the TCD are not
connected properly to the detector board or are touching each other, or if the
wires from the ∆PRT are not properly connected to the detector board. (Units
made before April 1997 may not use a ∆PRT.)
The detector will not be ready until the condition is corrected.
Check that the filament and ∆PRT wires from the cell are connected on
the detector board properly.
The TCD’s cell must be replaced.
Fault 220—Heater over current. Thermal shutdown
Status message: Heater overcurrent
This message appears when there is a short in the heater of a heated zone, or
when a heated zone’s electronics are defective. This error does not indicate
a problem with the oven.
Power to the small zones is disabled. To clear the error message, turn off all
the heated zones and turn the GC off and then on again.
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Error Codes and Internal Diagnostics
Agilent 6890 Gas Chromatograph Service Manual
Jun 2001
Faults
Fault 220—Heater over current. Thermal shutdown
Jun 2001
850
The fault could be caused by a malfunction in the heater sensor or the
heater electronics.
See Fault 221—Thermal shutdown (status message).
Error Codes and Internal Diagnostics
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Faults
Fault 221—Thermal shutdown (status message)
Fault 221—Thermal shutdown (status message)
This fault has no popup display message, only a status message.
This fault causes the GC to shut down entirely. A thermal fault is detected if
the oven or another heated zone is not within its allowable temperature range
(lower than minimum temperature or greater than maximum temperature by
25°C). Several things could cause this error:
•
•
•
•
A problem with the electrical supply to the instrument
A malfunction of the zone control electronics
A shorted temperature sensor
A shorted heater
No power will reach the oven and other heated zones. The 6890 GC will be
not ready.
Any of the following components can experience a thermal shutdown: the
oven, the inlets, the detectors, and the aux zones. In addition, problems with
electronics on the main PC board can cause a thermal shutdown.
If you see any thermal shutdown message, first turn the GC off and on.
If the error was caused by a power supply problem, the error will
disappear and the instrument will become ready. If the error reappears,
the main board, or one or more of the heater/sensor assemblies, must be
replaced.
Fault 222—Oven thermal shutdown
Status message: Oven temp too hot
The oven temperature reading indicates the oven is above its maximum
allowable temperature by at least 25°C. This indicates a defective oven heater
drive or a defective oven sensor.
No power will reach the oven and other heated zones. The 6890 GC will be
not ready.
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To determine if the oven sensor is broken, its resistance must be tested.
The resistance will be 100 ohms if the sensor is working correctly; a much
larger value indicates a faulty sensor.
Error Codes and Internal Diagnostics
Agilent 6890 Gas Chromatograph Service Manual
Jun 2001
Faults
Fault 223—Oven thermal shutdown
850
If the oven sensor is operating correctly and the error persists, the main
board must be replaced.
See Fault 221—Thermal shutdown (status message).
Fault 223—Oven thermal shutdown
Status message: Oven temp too cool
The oven temperature reading indicates the oven is less than its minimum
allowable temperature. This indicates a stuck open cryo valve or a shorted
oven sensor.
Power to the small zones is disabled. To clear the error message, turn off all
the heated zones and turn the GC off and then on again.
See Fault 221—Thermal shutdown (status message).
Fault 224—Oven thermal shutdown
Status message: Oven temp sensor
The oven temperature reading reports the oven’s temperature is lower than
expected, which indicates a shorted oven sensor. Power will be turned off for
all the heated zones.
The sensor must be replaced.
See Fault 221—Thermal shutdown (status message).
Fault 225—Front detector thermal shutdown
Status message: F det temp too hot
The front detector’s temperature is higher than the maximum allowable
temperature (detector type maximum temperature plus an additional 25°C).
This indicates a defective heater drive on the mainboard or a defective sensor.
Power is disabled to all the heated zones. This fault can only be cleared by
turning off all the heated zones and turning the instrument off and on again.
Jun 2001
The problem could be caused by a defective sensor or defective heater
driver on the mainboard.
See Fault 221—Thermal shutdown (status message).
Error Codes and Internal Diagnostics
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Faults
Fault 226—Front detector thermal shutdown
Fault 226—Front detector thermal shutdown
Status message: F det temp sensor
The front detector temperature reading reports the detector’s temperature is
lower than expected, which indicates a shorted sensor. Power will be turned
off for the detector.
The sensor must be replaced.
See Fault 221—Thermal shutdown (status message).
Fault 227—Back detector thermal shutdown
Status message: B det temp too hot
The back detector’s temperature is higher than the maximum allowable
temperature (detector type maximum temperature plus an additional 25°C).
This indicates a defective heater drive on the mainboard or a defective sensor.
Power is disabled to the small zones and the oven. This fault can only be
cleared by turning off all the heated zones and turning the instrument off and
on again.
The problem could be caused by a defective sensor or defective heater
driver on the mainboard.
See Fault 221—Thermal shutdown (status message).
Fault 228—Back detector thermal shutdown
Status message: B det temp sensor
The back detector temperature reading reports the detector’s temperature is
lower than expected, which indicates a shorted sensor. Power will be turned
off for detector.
The sensor must be replaced.
See Fault 221—Thermal shutdown (status message).
Fault 229—Front inlet thermal shutdown
Status message: F inl temp too hot
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Error Codes and Internal Diagnostics
Agilent 6890 Gas Chromatograph Service Manual
Jun 2001
Faults
Fault 230—Front inlet thermal shutdown
850
The front inlet’s temperature is higher than the maximum allowable
temperature (detector type maximum temperature plus an additional 25°C).
This indicates a defective heater drive on the mainboard or a defective sensor.
Power is disabled to the small zones and the oven. This fault can only be
cleared by turning off all the heated zones and turning the instrument off and
on again.
The problem could be caused by a defective sensor or defective heater
driver on the mainboard.
See Fault 221—Thermal shutdown (status message).
Fault 230—Front inlet thermal shutdown
Status message: F inl temp sensor
The front inlet temperature reading reports the inlet’s temperature is lower
than expected, which indicates a shorted sensor. Power will be turned off for
inlet.
The sensor must be replaced.
See Fault 221—Thermal shutdown (status message).
Fault 231—Back inlet thermal shutdown
Status message: B inl temp too hot
The back inlet’s temperature is higher than the maximum allowable
temperature (detector type maximum temperature plus an additional 25°C).
This indicates a defective heater drive on the mainboard or a defective sensor.
Power is disabled to the small zones and the oven. This fault can only be
cleared by turning off all the heated zones and turning the instrument off and
on again.
Jun 2001
The problem could be caused by a defective sensor or defective heater
driver on the mainboard.
See Fault 221—Thermal shutdown (status message).
Error Codes and Internal Diagnostics
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850
Faults
Fault 232—Back inlet thermal shutdown
Fault 232—Back inlet thermal shutdown
Status message: B inl temp sensor
The back inlet temperature reading reports the inlet’s temperature is lower
than expected, which indicates a shorted sensor. Power will be turned off for
inlet.
The sensor must be replaced.
See Fault 221—Thermal shutdown (status message).
Fault 233—Aux 1 thermal shutdown
Status message: Aux l temp too hot
The aux zone’s temperature is higher than the maximum allowable
temperature (detector type maximum temperature plus an additional 25°C).
This indicates a defective heater drive on the mainboard or a defective sensor.
Power is disabled to the small zones and the oven. This fault can only be
cleared by turning off all the heated zones and turning the instrument off and
on again.
The problem could be caused by a defective sensor or defective heater
driver on the mainboard.
See Fault 221—Thermal shutdown (status message).
Fault 234—Aux zone 1 thermal shutdown
Status message: Aux l temp sensor
Aux zone 1’s temperature reading reports that its temperature is lower than
expected, which indicates a shorted sensor. Power will be turned off for the
zone.
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The sensor must be replaced.
See Fault 221—Thermal shutdown (status message).
Error Codes and Internal Diagnostics
Agilent 6890 Gas Chromatograph Service Manual
Jun 2001
Faults
Fault 235—Aux 2 thermal shutdown
850
Fault 235—Aux 2 thermal shutdown
Status message: Aux 2 temp too hot
The aux zone’s temperature is higher than the maximum allowable
temperature (detector type maximum temperature plus an additional 25°C).
This indicates a defective heater drive on the mainboard or a defective sensor.
Power is disabled to the small zones and the oven. This fault can only be
cleared by turning off all the heated zones and turning the instrument off and
on again.
The problem could be caused by a defective sensor or defective heater
driver on the mainboard.
See Fault 221—Thermal shutdown (status message).
Fault 236—Aux 2 thermal shutdown
Status message: Aux 2 temp sensor
Aux zone 2’s temperature reading reports that its temperature is lower than
expected, which indicates a shorted sensor. Power will be turned off for the
zone.
The sensor must be replaced.
See Fault 221—Thermal shutdown (status message).
Fault 237—No line interrupt. Thermal shutdown.
Status message: No line interrupt
The electronics on the main board are not functioning correctly. Power will
be shut off to the oven and other heated zones. The 6890 GC will not be ready.
Jun 2001
The main board must be replaced.
See Fault 221—Thermal shutdown (status message).
Error Codes and Internal Diagnostics
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850
Faults
Fault 238—Faulty line interrupt. Thermal shutdown.
Fault 238—Faulty line interrupt. Thermal shutdown.
Status message: Line interrupt
The electronics on the main board are not functioning correctly or there is
an excessive amount of noise in the power supply to the instrument. Power
will be shut off to the oven and other heated zones. The 6890 GC will not be
ready.
Turn the 6890 GC off and then on again. If the problem was caused by
noise in the power supply, the instrument will operate normally again.
If the error persists, the main board must be replaced.
See Fault 221—Thermal shutdown (status message).
Fault 239—Mux ADC thermal shutdown
Status message: No mux ADC response
The multiplexor, which processes the 6890 GC electronic signals, is not
functioning. Most likely, the multiplexor’s circuitry is defective. Power will be
shut off to the oven and other heated zones. The 6890 GC will not be ready.
The main board must be replaced.
See Fault 221—Thermal shutdown (status message).
Fault 240—Mux ADC thermal shutdown
Status message: Mux ADC offset value
The multiplexor, which processes the 6890 GC electronic signals, is not
functioning. Most likely, the multiplexor’s circuitry is defective. Power will be
shut off to the oven and other heated zones. The 6890 GC will not be ready.
The main board must be replaced.
See Fault 221—Thermal shutdown (status message).
Fault 241—Line sense reading thermal shutdown
Status message: Invalid line sense
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Error Codes and Internal Diagnostics
Agilent 6890 Gas Chromatograph Service Manual
Jun 2001
Faults
Fault 242—Pneu aux module invalid constants
850
The line sense circuitry on the mainboard is not measuring the line power
correctly. Since it is indicating the power supply is not within acceptable
limits, the power to the heated zones is disabled. Turn the zones off to clear
the error.
Most likely, the main board must be replaced.
See Fault 221—Thermal shutdown (status message).
Fault 242—Pneu aux module invalid constants
Fault 243—Pneu aux module invalid constants
Fault 244—Pneu aux module invalid constants
Status message: Aux 3 faulty fact cal or Aux 4 faulty fact cal or Aux 5 faulty
fact cal
Two conditions could cause this error:
•
•
The module installed in the aux position is not an aux module.
The aux module is not working correctly; for example, the EEPROM could
be an unsupported version.
Module will not be usable.
Remove the module from the aux position and install the correct module.
Fault 245—Front det module: obsolete EEPROM
Fault 246—Back det module: obsolete EEPROM
Status message: F det module rev or B det module rev
The front or back detector’s EEPROM is not recognized by the 6890 GC. The
module is unusable.
Jun 2001
The version of the module is not compatible with the version of the
6890 GC.
Error Codes and Internal Diagnostics
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Faults
Fault 247—Front inlet module: obsolete EEPROM
Fault 247—Front inlet module: obsolete EEPROM
Fault 248—Back inlet module: obsolete EEPROM
Status message: F inlet module rev or B inlet module rev
The front or back inlet’s EEPROM is not recognized by the 6890 GC. The
module is unusable.
The version of the module is not compatible with the version of the
6890 GC.
Fault 249—Pres aux module: obsolete EEPROM
Status message: Aux module rev
The aux pressure’s EEPROM is not recognized by the 6890 GC. The module
is unusable.
The version of the module is not compatible with the version of the
6890 GC.
Fault 250—Front det: non-det module
Fault 251—Back det: non-det module
Status message: F det wrong module or B det wrong module
The module installed in an inlet slot is unusable. Two things could cause this
condition:
•
•
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The module is installed in the wrong position. For example, a detector
module might be installed in the inlet position.
If the correct module is installed, it may be malfunctioning or its EEPROM
may be unrecognized by the 6890 GC.
Make sure that the correct type of module is installed.
Error Codes and Internal Diagnostics
Agilent 6890 Gas Chromatograph Service Manual
Jun 2001
Faults
Fault 252—Front inlet: non-inlet module
850
Fault 252—Front inlet: non-inlet module
Fault 253—Back inlet: non-inlet module
Status message: F inlet wrong module or B inlet wrong module
The module installed in a detector slot is unusable. Two things could cause
this condition:
•
•
The module is installed in the wrong position. For example, an inlet
module might be installed in the detector position.
If the correct module is installed, it may be malfunctioning or its EEPROM
may be unrecognized by the 6890 GC.
Make sure that the correct type of module is installed.
Fault 254—Non-aux module in pneu aux position
Status message: Aux wrong module
The module installed in aux slot is unusable. Two things could cause this
condition:
•
•
The module is installed in the wrong position. For example, an inlet
module might be installed in the aux position.
If the correct module is installed, it may be malfunctioning or its EEPROM
may be unrecognized by the 6890 GC.
Make sure that the correct type of module is installed.
Fault 255—Front detector: invalid det module
Fault 256—Back detector: invalid det module
Status message: F det invalid type or B det invalid type
The front or back detector module is not supported by the firmware installed
in the 6890 GC.
Jun 2001
Error Codes and Internal Diagnostics
Agilent 6890 Gas Chromatograph Service Manual
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850
Faults
Fault 257—Front inlet: invalid inlet module
Fault 257—Front inlet: invalid inlet module
Fault 258—Back inlet: invalid inlet module
Status message: F inlet invalid type or B inlet invalid type
The front or back inlet module is not supported by the firmware installed in
the 6890 GC.
Fault 259—Front detector: det board not the same as module
Fault 260—Back detector: det board not the same as module
Status message: F det type mismatch or B det type mismatch
The detector module does not match the installed detector electronics board.
The position of the detector pneumatics module and detectors were
changed, but the detector board was not. Change the detector boards.
Fault 261—Host communications: MIO board defective
Status message: MIO board defective
The connection between the MIO PC board and the mainboard could be faulty
or the MIO board is defective. Communication between the 6890 GC and the
host will halt.
Reseat the MIO card.
If reseating did not correct the problem, the MIO PC board is defective.
Fault 262—Host communications: RS232 defective
Status message: RS232 defective
The communications between the RS232 chip and the mainboard are faulty.
Most likely, the mainboard is faulty. Communication between the GC and the
other device will halt.
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Error Codes and Internal Diagnostics
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Faults
Fault 263—Host communications: GPIB (or HPIB)defective
850
Fault 263—Host communications: GPIB (or HPIB)defective
Status message: GPIB (or HP-IB) defective
The communications between the GPIB (or HP-IB) chip and the mainboard
are faulty. Most likely, the mainboard is faulty. Communication between the
GC and the other device will halt.
Fault 264—Sampler communications: RS232 defective
Status message: Sampler RS232 defect
The communications between the RS232 chip and the mainboard are faulty.
Most likely, the mainboard is faulty. Communication between the GC and the
other device will halt.
Fault 265—Front inlet: invalid pids
Fault 266—Back inlet: invalid pids
Status message: F inlet invalid pid or B inlet invalid pid
pid is an abbreviation for the constants used in the algorithm that controls
temperature. This fault means that the module calibration is no longer valid.
Fault 267—Front detector: invalid pids
Fault 268—Back detector: invalid pids
Status message: F detector invalid pid or B detector invalid pid
pid is an abbreviation for the constants used in the algorithm that controls
temperature. This fault means that the module calibration is no longer valid.
Fault 269—Pneu aux module: invalid pids
Status message: Pneu aux invalid pid
pid is an abbreviation for the constants used in the algorithm that controls
temperature. This fault means that the module calibration is no longer valid.
Jun 2001
Error Codes and Internal Diagnostics
Agilent 6890 Gas Chromatograph Service Manual
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850
Faults
Fault 270—Front inlet: invalid module checksum
Fault 270—Front inlet: invalid module checksum
Fault 271—Back inlet: invalid module checksum
Status message: F inlet bad cksum or B inlet bad cksum
The inlet module’s calibration is no longer valid.
Fault 272—Front detector: invalid module checksum
Fault 273—Back detector: invalid module checksum
Status message: F det bad cksum or B det bad cksum
The detector module’s calibration is no longer valid.
Fault 274—Pneu aux module: invalid module checksum
Status message: Pneu aux bad cksum
The aux pneumatics module’s calibration is no longer valid.
Fault 275—Front inlet: invalid constants from factory
Fault 276—Back inlet: invalid constants from factory
Status message: F inlet bad fact cal or B inlet bad fact cal
The inlet module’s calibration is invalid.
Fault 277—Front detector: invalid constants from factory
Fault 278—Back detector: invalid constants from factory
Status message: F det bad fact cal or B det bad fact cal
The detector module’s calibration is invalid.
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Error Codes and Internal Diagnostics
Agilent 6890 Gas Chromatograph Service Manual
Jun 2001
Faults
Fault 279—Pneumatics aux: invalid constants from factory
850
Fault 279—Pneumatics aux: invalid constants from factory
Status message: P aux bad fact cal
The aux pneumatics module’s calibration is invalid.
Fault 280—F inlet read/write failure. Module is unusable.
Fault 281—B inlet read/write failure. Module is unusable.
Status message: F inlet i/o failure or B inlet i/o failure
The EPC module is malfunctioning. Replace the module.
Fault 282—F det read/write failure. Module is unusable.
Fault 283—B det read/write failure. Module is unusable.
Status message: F det i/o failure or B det i/o failure
The EPC module is malfunctioning. Replace the module.
Fault 284—Pneu aux read/write failure. Module is unusable.
Status message: Pneu aux i/o failure
The EPC module is malfunctioning. Replace the module.
Fault 285—Front detector offset adjustment failed
Fault 286—Back detector offset adjustment failed
Status message: F det adjust failure or B det adjust failure
An ECD or NPD detector has failed to successfully achieve the target offset
setpoint within the adjustment range. The instrument will not be ready until
“Adjust Offset” is turned Off or On.
Fault 287—F OIM not installed
Fault 288—B OIM not installed
The OIM module is required by the method but is not present.
Jun 2001
Error Codes and Internal Diagnostics
Agilent 6890 Gas Chromatograph Service Manual
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Faults
Fault 288—B OIM not installed
Error Codes and Internal Diagnostics
Agilent 6890 Gas Chromatograph Service Manual
Jun 2001