Types Of Errors; Table 1: Self-Test Error Table - Welch Allyn SureTemp 986 Service Manual

3. Troubleshooting

3.1.1 Types of Errors

Error Class
E0.1 Instrument
E0.2 Instrument
E1.1 Ambient
E1.2 Ambient
E2.1 Battery
E3.1 Instrument
E4.1 Instrument
E5.0 Instrument
E5.1 Instrument
E5.2 Instrument
E5.3 Instrument
E5.7 Instrument
E5.8 Instrument
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There are three types of recoverable and non-recoverable errors, and
each type of error has a unique display that will last about five seconds
before the unit goes into Low Power Mode (blank display).
Ambient Error The Operating Temperature is out of limits.
An Ambient Temperature Too High error display
(E1.1) shows a © flashing two times per second,
together with an A and the °F or °C icon.
An Ambient temperature Too Low error (E1.2)
display shows a ™ flashing two times per second,
together with an A and the °F or °C icon.
Battery Error The display shows a non-flashing battery icon,
with no other LCD icons visible.
Instrument The display shows a non-flashing Err in the lower
Error
numeric LCD digits, with no other LCD icons.
Each error type can be viewed using the Error Recall Mode
(Section 3.1.2).

Table 1: Self-Test Error Table

Description
Probe heater energy accumulator
test.
Probe A/D pulse width test.
Ambient temperature high test.
Ambient temperature low test.
"Dead" battery test.
RAM error
Ratio Cal resistor A/D pulse width
test.
Heater circuit test.
Heater overheated test.
Heater hardware watchdog time
out test.
No Probe Heater
Data Overrun test
Stack Overflow test
Action
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Move unit to lower ambient
temperature area and retry
Move unit to a higher ambient
temperature area and retry
Replace batteries
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Try a different probe, then
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70995-0000B M986