Welch Allyn LC101 CO2 Module - User Manual - Manual (Page 72)

LC101 CO
2
Module OEM Implementation Manual
Page 72 Confidential Welch Allyn OEM Technologies
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:
• Do a reset (with the exception of 81, 82, 84 and 85).
System faults are listed in the following table:
Status Message
Code (hex) Definition Possible Causes
40 watchdog error • watchdog timeout
44 system EEPROM error
in CCITT/CRC code • invalid system EEPROM CCITT/CRC code
46 system FLASH ROM
error in CCITT/CRC
code • invalid FLASH ROM CCITT/CRC code
• faulty FLASH ROM chip
47 system communication
error • microprocessor failure to complete task
• malfunctioning real-time operating system
4B system external RAM
error • faulty system external RAM
4C system internal 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 main program
exited • executive failure
80 pump failure • faulty pump;
• pneumatics disconnected
81 unexpected reverse flow • watertrap/cannula/exhaust tubing not properly con-
nected
82 unexpected forward flow • watertrap/cannula/exhaust tubing not properly con-
nected
84 barometric pressure too
high • host system operating above 824 mmHg (1,150 ft
below sea level)
• faulty barometric transducer
85 barometric pressure too
low • host system operating below 408 mmHg (15,000 ft
above sea level)
• faulty barometric transducer