# Text Description Action
2266 ? Gain override FID DPM Detector PIC: An external sig‐
nal is applied to the DPM, overriding the
DPM gain control. This is a normal situa‐
tion if a signal is connected to the exter‐
nal gain-select connector.
If no external signal is connected, re‐
place the DPM.
2267 ? Gain select not supported FID DPM Detector PIC: An attempt was
made to change the gain on a configura‐
tion that does not support the dual gain
feature. The request was ignored.
Remove access to the GAIN_ALT_SE‐
LECT DO.
2268 ? Igniter type changed FID DPM Detector PIC: The spark igniter
was connected or disconnected during
an ignition sequence, causing the igni‐
tion sequence to be aborted.
Verify that the igniter is properly con‐
nected.
Replace the igniter.
Replace the DPM.
2297,
2298
! Buffer Overflow [FID; TCD]
on %4
FID DPM Detector PIC: The PIC detector
data buffer filled up before an I2C com‐
mand was received to retrieve the data.
Some data was lost. The SNECON
was not fast enough to retrieve the points
or the SNECON stopped polling without
turning off the corresponding detector
channel. This may happen with a combi‐
nation of a very high speed detector with
a large burst of I/O commands.
Stagger the balance events and valve
switching events by approximately
10-20 ms to distribute the load on the
I2C bus.
Disconnect the SNECON debug cable
(if connected) and reset.
Reload SNECON OS and APP soft‐
ware.
2299 ! Detector Disabled on %4 FID DPM Detector PIC: An attempt was
made to read detector information from
a disabled detector.
Cycle power. If the error repeats re‐
place the module.
2305 ! Flame Out on %4 FID DPM Detector PIC: The flame is out;
the data generated on the FID channel is
invalid.
Verify adequate flame gas supply.
Verify the operation of any associated
EPC.
2306 ! FID Bias off on %4 FID DPM Detector PIC: The detector is
used while the 300 Volts bias is disabled.
The data validity is unknown.
Set the 'disable bias' DO to ‘0’.
General Maintenance and Troubleshooting
4.6 Alarm Codes, Descriptions, and Suggested Actions
Maxum edition II Analyzer General Maintenance
Manual, August 2018, A5E42019842001 61
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