Welch Allyn 420 Series - Temperature Error Codes; SpO2 Error Codes

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