Welch Allyn Grason-Stadler GSI 17 Series - Troubleshooting Error Codes E26-E39

Error Code
--
E26
E27
E28 & E29
E31
E32
E33
E34
E35
E36
E37
E38
E39
Probable Cause and Solution
EEPROM CHECKSUM ERROR -
Data in the Mirror Memory
is in error. If not recoverable perform
calibration. If the problem is not resolved by
calibration replace U503.
EPROM TO EEPROM DATA LOAD ERROR - If not
recoverable replace U503 then U505.
CALIBRATION TYPE READ ERROR - Should occur only
upon entry to Calibration Mode.
If not recoverable
the problem may be related to S2, S6, U509, U508,
U506, or U503.
BATTERY SHUT DOWN LEVEL READ ERROR - If not
recoverable perform Battery Low/Shut Down
Calibration (Calibration Section 4.9.4).
If the
problem persists replace U503.
BATTERY WARNING LEVEL READ ERROR - If not
recoverable perform Battery Low/Shut Down
Calibration (Calibration Section 4.9.4). If
problem persists replace U503.
STACK OVERFLOW ERROR - Should always be
recoverable.
If the error persists replace U503 or
U505.
BAD POINTER TO EEPROM ROUTINES - If not recoverable
replace U505 then U503.
INVALID KEY CODE ERROR -
If not recoverable replace
U505 then U503.
INVALID KEY SOURCE ERROR - If not recoverable
replace U505 then U503.
INVALID QUEUE POINTER ERROR - If not recoverable
replace U505 then U503.
BATTERY VALUE OUT OF RANGE - If not recoverable
perform Battery Low/Shut Down Calibration
(Calibration Section 4.9.4).
If problem persists
replace
U503.
ERROR PERTAINS TO FACTORY CALIBRATION PORT - If not
recoverable replace U503.
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