Ohmeda 3000 - Control Unit Troubleshooting Guide; Error Code Analysis

6/Control Unit Troubleshooting Guide
The error code is displayed in the Elapsed Time display.
Error
#01
#02
#03
#04
#05
#06
#07
#08
#09
#10
Description
Instruction test fails
Calibrate high fails
Calibrate low fails
Checksum fails
Ram test fails
Port 1 lines
ADC not converting
Hardware triac timer
Heat not controlied
Line voltage out of
range.
Possible Cause
Microprocessor 8031 defective
ADC calibration
Cal high resistor defective
ADC calibration
Cal low resistor defective
Eprom defective
Microprocessor 8031 defective
Microprocessor 8031 defective
1/0 expander 8243 defective
Microprocessor 8031 defective
A/D Converter ADC3711 defective
Voltage Reference LM10 defective
VO expander 8243 #2 defective
Logic gate 4020B defective
IC in triac test area defective
Heater triac defective
Microprocessor 8031 defective
Heater opto-isolator or
driver defective
Line voltage compensation pot.
on power supply board not
calibrated.
6-1