Welch Allyn 420 Series Operator's Manual page 46

Temperature Error Codes
Code
E0.2, E0.3 Ambient temperature out of range
C22 10 minute diagnostic limit exceeded
SpO
Code
E7 Internal malfunction
C9 10 minute diagnostic limit exceeded
40
Description
Error Codes
2
Description
Corrective Action
Adjust temperature or device location.
Check patient. Read Operator's Manual.
Verify that the device is not used for mon-
itoring purposes.
Corrective Action
Contact Customer Service.
Check patient. Press Next Patient/Clear
button to clear error code. Verify that the
device is not used for monitoring pur-
poses.
Welch Allyn