# Text Description Action
1091 + I2C Write Before Read on
%4
All PICs: An attempt was made to write
an I2C message before reading the re‐
sponse from a previous message. This
indicates that an attempt was made to do
a Slave Write - RepeatStart - Slave
Write combination.
Contact Customer Support.
1092 + I2C Read Unexpected on
%4
All PICs: An I2C read from the peripheral
was attempted before a slave write loa‐
ded a command.
Contact Customer Support.
1093 + I2C Invalid Checksum on
%4
All PICs: An I2C message with an invalid
checksum was received. The mes‐
sage was ignored.
Contact Customer Support.
1094 ! Data not available on %4 All PICs: Some data was lost and is no
longer available. For a detector channel
it means that a 'Detector Read' command
was received with an invalid index. This
can happen when a request to retransmit
detector data came too late when the da‐
ta was already gone from the buffer.
This situation may also happen while ac‐
cessing the I/O related to the LM75
(BOARD_TEMPERATURE and OVER‐
TEMP_SETPOINT). It indicates that the
local I2C bus was not available to per‐
form the desired action.
Cycle power.
If the error repeats, replace the module
or the SNECON.
1095 + Invalid Message on %4 All PICs: An I2C message with a valid
checksum was not recognized or had an
invalid op-code.
Cycle power.
If the error repeats, replace the module
or the SNECON.
1096 + Diagnostic mode enabled
on %4
Informational message. No action Necessary.
1121 ! Firmware Math error on %4 All PICs: An unexpected math operation
error was detected by the PIC. It can be
an un-handled overflow, underflow, etc.
This flag is always associated with a
FIRMWARE_FAULT flag.
Cycle power.
If the error repeats, replace the module.
1122 ! Firmware Mem error on %4 All PICs: A jump or a call was made to an
invalid PIC memory location causing the
PIC to be reset. This flag is always as‐
sociated with a FIRMWARE_FAULT flag.
Cycle power.
If the error repeats, replace the module.
1123 ! Firmware Table error on
%4
All PICs: An error was detected when ad‐
dressing an internal PIC firmware table.
The index in the table is likely to be inva‐
lid. This flag is always associated with a
FIRMWARE_FAULT flag.
Cycle power.
If the error repeats, replace the module.
General Maintenance and Troubleshooting
4.6 Alarm Codes, Descriptions, and Suggested Actions
Maxum edition II Analyzer General Maintenance
Manual, August 2018, A5E42019842001 51
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