Welch Allyn Duet CO2 Module - User Manual - Manual (Page 75)

Duet CO
2
Module OEM Implementation Manual
Welch Allyn OEM Technologies Confidential Page 75
Error Messages & Recovery
This appendix lists and defines the Duet CO
2
Module status codes. Recovery attempts are suggested if
the status indicates a fault condition. The fault conditions are grouped in three categories.
§ Advisories - non-fatal conditions, which do not halt module operation.
§ Soft faults – conditions which interrupt module operation, including transmission of CO
2
waveform and breath data packets, until the fault is cleared. The module can accept
commands in the soft fault state..
§ Hard faults – Halt Module operation and prevent the module from accepting commands.
A Host reset can be used in an attempt to clear hard faults.
Recovery attempts may include the host initiating a reset.
• Reset – If the host holds the receive data line in a break condition for greater than 10 msec,
but less than 500 msec, the microprocessor is forced into reset.. After a reset, the module
returns to its EEPROM default settings and starts in the sidestream fault mode. The module
can respond to host communication 2 seconds after a hard reset.
Advisories
Mainstream/Sidestream
Status
Message Code
(hex) Definition Possible Causes
00 status ok
01 communication error • host/module communication is in error
02 host command with invalid data • identifier is inconsistent with data
03 unprotected operation violation • host attempts to invoke a protected
operation
10 warm up in progress • status requested during preliminary warm
up phase of mainstream sensor
11 CO
2
sensor start up in progress • status requested during CO
2
sensor
chopper motor start up phase
13 signal low • obstructed airway adapter
• airway adapter windows not clean
• CO
2
sensor windows not clean
• faulty airway adapter/CO
2
sensor