# Text Description Action
4028 ? Detector channel unknown
error occurred on %4
Undeterminable error occurred on detec‐
tor channel circuit. This error may also be
a secondary error caused by an overflow
on an FID DPM.
Reset. If error repeats, replace DPM.
4029,
4030
? Zero Correction failure on
[first/lower/right; second/
lower/left] channel of %4
Should occur only with a revision 2 TCD
DPM or revision 3 baseboard (PIC firm‐
ware revision 2.006 and up ). Or, the zero
correction value exceeded the maximum
allowed value for that particular board.
This is a balance failure situation.
Eliminate the cause of the balance fail‐
ure:
On TCD detector, replace the detector
bead or filament.
On FID detector, clean or replace the
FID.
4031 ! Flame out on %4 Flame out detected on an Advance+ FID
or FPD Board.
Ignite flame on unit. If flame is burning,
board may be defective.
4032 ? Purge Loss on %4 Loss of purge pressure has been detec‐
ted. Possible causes include low pres‐
sure for supply air, open door, and failed
gaskets. Depending on the environment
classification where the analyzer is instal‐
led, this alarm may indicate an unsafe
condition that requires immediate action
to correct.
Investigate and correct cause of pres‐
sure loss.
4033 ! Zero Correction Out of Lim‐
its on %4
The value of the zero correction (soft‐
ware balance of the detector) has excee‐
ded the balance limits.
Confirm that the corresponding balance
limit values are not too small. See the
maintenance instructions for the specif‐
ic detector type.
4120 ? Pulse DO Within a Pulse
DO is Not Allowed on %4
A pulse DO was requested by the SY‐
SCON while a pulse DO was already in
progress. The latest requested pulse
DO was ignored.
Wait until the on-going pulse has com‐
pleted before requesting another pulse
DO.
4121 + Pulse DO Aborted on %4 A pulse DO was aborted as a result of a
standard (non-pulsed) DO command.
The non-pulsed DO command has
precedence.
Informational message. No action nec‐
essary.
4122 ! Method Conflict: Concur‐
rent Chromatogram Chan‐
nel Acquisition on %4
It is not allowed to use the same detector
channel for more than one chromato‐
gram acquisition at a time, whether within
a method or across methods. The new‐
est request was cancelled.
Verify that the method does not contain
2 concurrent uses of the same detector
channel hardware. Verify that the meth‐
ods running in separate applications
are not erroneously reusing the same
detector channels.
4123 ! Unsupported detector sam‐
pling rate on %4
A request was made to run the specified
detector channel at a standard rate but
the DPM hardware does not support that
rate. The method file is likely corrupt. It
may be necessary to rebuild the method.
Contact Customer Support for assis‐
tance.
4124 ! Run-time Operational Con‐
flict on %4
An operation was requested at a time
when it is not allowed. e.g.: GainSelect
VDO: A gain select was initiated before
the previous GainSelect sequence was
completed.
Revise the method to remove the con‐
flicting events.
General Maintenance and Troubleshooting
4.6 Alarm Codes, Descriptions, and Suggested Actions
Maxum edition II Analyzer General Maintenance
76 Manual, August 2018, A5E42019842001
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