System Number Error Possible Cause Trouble Shooting
EEPROM
1.6
Small tank
float
calibration
error
- Canister was replaced and float was
not calibrated
- Main controller PCBA was replaced
- EEPROM was reset in technician
mode
- Recalibrate small canister
- Calibrate float (see
Performing the Canister
Calibration on page 6-11)
1.7
Small tank
float
calibration
error
- Recalibrate large canister
- Calibrate float (see
Performing the Canister
Calibration on page 6-11)
1.8
PNSN
EEPROM
error
- Serial number board detected did not
match the expected value
- Verify serial number board is
seated properly
COMM
2.0
UART
checksum
error
N/A N/A
2.1
UART
timeout error
N/A N/A
2.2
TWI port
expander
error
- Main controller board failed - Replace main controller board
2.3
TWI MAIN
eeprom error
N/A N/A
2.4 TWI timeout N/A N/A
2.5
TWI PNSN
eeprom error
- Serial number board has been
unplugged
- Verify serial number board is
seated properly
5-22
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