Welch Allyn Duet CO2 Module - User Manual - Manual (Page 82)

Duet CO
2
Module OEM Implementation Manual
Page 82 Confidential Welch Allyn OEM Technologies
79h, CO
2
Sensor Motor Start Error
CO
2
sensor’s chopper motor does not start.
Action If mainstream operation, try a different sensor and issue a new measurement mode
command. If sidestream operation, send a new host measurement mode command.
7Bh, CO
2
Sensor Signal Unable to Synchronize
After enabling the IR source, the software attempts to determine which phase of chopper
wheel rotation the CO
2
sensor is in. If the software is unable to detect, or synchronize to the
phase after 60 seconds, this fault occurs and a CO
2
sensor shutdown occurs.
•
Action If mainstream operation, try a different sensor and issue a new measurement mode
command. If sidestream operation, send a new host measurement mode command.
7Eh, CO
2
Sensor IR Source Error
IR source current is out of range when the source is active.
Action If mainstream operation, try a different sensor and issue a new measurement mode
command. If sidestream operation, send a new host measurement mode command.
System Faults
The majority of system faults are conditions that are internal to the module and not caused by the host.
The exceptions are 81h, 82h, 84h and 85h.
To clear most system faults With the exception of 81h, 82h, 84h and 85h, do a hard reset.
System faults are listed in the following table.
Status
Message Code Definition Possible Causes
40 watchdog error • watchdog timeout
44 system EEPROM error in CRC
code • invalid system EEPROM CRC code
46 system FLASH ROM error in
CRC code • invalid FLASH ROM CRC code
• faulty FLASH ROM chip
47 system communication error • microprocessor failure to complete task
• malfunctioning real-time operating system
4B/4C system RAM error • faulty system internal RAM
4D system FLASH ROM error in
checksum • invalid system internal FLASH data
• faulty FLASH ROM chip
4E stack overflow error • stack usage error
4F system SW error in main
program •
53 no mainstream daughter board • faulty/absent mainstream daughter board
• faulty interface to mainstream daughter
board
57 no sidestream daughter board • faulty/absent sidestream daughter board
• faulty interface to sidestream daughter
board
80 pump failure • faulty pump
• pneumatics disconnected