Table 12-5: Relay Board Status Led Failure Indications - Teledyne T300 Operation Manual

Troubleshooting and Service
Table 12-5: Relay Board Status LED Failure Indications
LED FUNCTION
D2
Wheel Heater
Yellow
D3
Bench Heater
Yellow
D4
Spare
Yellow
D5 Sample/Cal Gas
Green Valve Option
D6 Zero/Span Gas
Green Valve Option
D7 Shutoff Valve
Green Option
D8
IR SOURCE
Green
266
SIGNAL I/O PARAMETER
ACTIVATED BY VIEW RESULT
WHEEL_HEATER WHEEL_TEMP
BENCH_HEATER BENCH_TEMP
N/A N/A
CAL_VALVE N/A
SPAN_VALVE N/A
SHUTOFF_VALVE N/A
IR_SOURCE CO_MEASURE
Teledyne API – Model T300/T300M CO Analyzer
DIAGNOSTIC TECHNIQUE
Voltage displayed should change. If not:
Failed Heater
Faulty Temperature Sensor
Failed AC Relay
Faulty Connectors/Wiring
Voltage displayed should change. If not:
Failed Heater
Faulty Temperature Sensor
Failed AC Relay
Faulty Connectors/Wiring
N/A
Sample/Cal Valve should audibly change states. If
not:
Failed Valve
Failed Relay Drive IC on Relay Board
Failed Relay Board
Faulty +12 VDC Supply (PS2)
Faulty Connectors/Wiring
Zero/Span Valve should audibly change states. If
not:
Failed Valve
Failed Relay Drive IC on Relay Board
Failed Relay Board
Faulty +12 VDC Supply (PS2)
Faulty Connectors/Wiring
Shutoff Valve should audibly change states. If not:
Failed Valve
Failed Relay Drive IC on Relay Board
Failed Relay Board
Faulty +12 VDC Supply (PS2)
Faulty Connectors/Wiring
Voltage displayed should change. If not:
Failed IR Source
Faulty +12 VDC Supply (PS2)
Failed Relay Board
Failed IR Photo-Detector
Failed Sync/Demod Board
Faulty Connectors/Wiring
06864B DCN6314