User guide

Maintenance and Troubleshooting Section 8
CODE ERROR CAUSE CORRECTION
E. 0 System error Defective ROM Return for service
E.00 Lost calibration Defective RAM backup Return for service
value battery
E.01 Defective RAM Defective RAM Return for service
E .1 Open circuit in Connector improperly Check connection
Temp probe installed
Intermittent connection Repair or replace
in cable or plug
Faulty temperature sensor Repair or replace
E .2 High background Insufficient warm-up time See Preparation for Use
Incorrect probe zeroing See Zero Calibration
procedure
Probe needs servicing See probe instructions
Probe malfunction Repair or replace
E .3 Low Insufficient electrolyte See probe instructions
sensitivity
Contaminated electrodes See probe instructions
or fouled membrane
Membrane too thick Try another membrane
High resistance in probe Return for evaluation
connection
E .4 Output too high Membrane too thin Try another membrane
Short circuit Repair or replace
Electrodes need Repair or replace
resurfacing
Internal leakage in probe Repair or replace
or cable connector
M.XX Incorrect Mode Switch or circuit defect Return for service
(x may be any
digit or any letter)
YSI, Incorporated Model 52 26