Teledyne 300E Instruction Manual page 198

TROUBLESHOOTING & REPAIR PROCEDURES
LED Function
D2 Wheel
Yellow Heater
D3 Bench
Yellow Heater
D4 Spare
Yellow
D5 Sample/Cal
Green Gas Valve
Option
D6 Zero/Span
Green
Gas Valve
Option
D7 Shutoff
Green Valve Option
D8 IR SOURCE
Green
198
Signal I/O Parameter
Activated By
WHEEL_HEATER
BENCH_HEATER
N/A
CAL_VALVE
SPAN_VALVE
SHUTOFF_VALVE
IR_SOURCE
Model 300E Carbon Monoxide Analyzer
View Result
WHEEL_TEMP Voltage displayed should change.
If not:
BENCH_TEMP Voltage displayed should change.
If not:
N/A N/A
N/A Sample/Cal Valve should audibly
change states. If not:
N/A Zero/Span Valve should audibly
change states. If not:
N/A Shutoff Valve should audibly
change states. If not:
CO_MEASURE Voltage displayed should change.
If not:
Instruction Manual
Diagnostic Technique
§ Failed Heater
§ Faulty Temperature
Sensor
§ Failed AC Relay
§ Faulty Connectors/Wiring
§ Failed Heater
§ Faulty Temperature
Sensor
§ Failed AC Relay
§ Faulty Connectors/Wiring
§ Failed Valve
§ Failed Relay Drive IC on
Relay Board
§ Failed Relay Board
§ Faulty +12 VDC Supply
(PS2)
§ Faulty Connectors/Wiring
§ Failed Valve
§ Failed Relay Drive IC on
Relay Board
§ Failed Relay Board
§ Faulty +12 VDC Supply
(PS2)
§ Faulty Connectors/Wiring
§ Failed Valve
§ Failed Relay Drive IC on
Relay Board
§ Failed Relay Board
§ Faulty +12 VDC Supply
(PS2)
§ Faulty Connectors/Wiring
§ Failed IR Source
§ Faulty +12 VDC Supply
(PS2)
§ Failed Relay Board
§ Failed IR Photo-Detector
P/N 04288 Rev: A