Teledyne gfc 7000ta operation manual Relay Board Status LED Failure Indications

Models: gfc 7000ta

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Troubleshooting

 

Model GFC7000TA Carbon Dioxide Analyzer

Table 10-5: Relay Board Status LED Failure Indications

 

 

 

 

 

 

LED

FUNCTION

SIGNAL I/O PARAMETER

DIAGNOSTIC TECHNIQUE

ACTIVATED BY

VIEW RESULT

 

 

 

 

 

 

 

Voltage displayed should change. If not:

D2

WHEEL

 

 

Failed Heater

WHEEL_HEATER

WHEEL_TEMP

Faulty Temperature Sensor

Yellow

HEATER

 

 

Failed AC Relay

 

 

 

 

 

 

 

 

Faulty Connectors/Wiring

 

 

 

 

Voltage displayed should change. If not:

D3

BENCH

BENCH_HEATER

BENCH_TEMP

Failed Heater

Faulty Temperature Sensor

Yellow

HEATER

 

 

Failed AC Relay

 

 

 

 

 

 

 

 

Faulty Connectors/Wiring

D4

SPARE

N/A

N/A

N/A

Yellow

 

 

 

 

 

 

 

 

Sample/Cal Valve should audibly change states. If

 

 

 

 

not:

D5

SAMPLE/CAL

 

 

Failed Valve

GAS VALVE

CAL_VALVE

N/A

Failed Relay Drive IC on Relay Board

Green

OPTION

 

 

Failed Relay Board

 

 

 

 

 

 

 

Faulty +12 VDC Supply (PS2)

 

 

 

 

Faulty Connectors/Wiring

 

 

 

 

Zero/Span Valve should audibly change states. If

 

 

 

 

not:

D6

ZERO/SPAN

SPAN_VALVE

N/A

Failed Valve

GAS VALVE

Failed Relay Drive IC on Relay Board

Green

OPTION

 

 

Failed Relay Board

 

 

 

 

 

 

 

Faulty +12 VDC Supply (PS2)

 

 

 

 

Faulty Connectors/Wiring

 

 

 

 

Shutoff Valve should audibly change states. If not:

D7

SHUTOFF

 

 

Failed Valve

SHUTOFF_VALVE

N/A

Failed Relay Drive IC on Relay Board

Green

VALVE OPTION

Failed Relay Board

 

 

 

 

 

 

Faulty +12 VDC Supply (PS2)

 

 

 

 

Faulty Connectors/Wiring

 

 

 

 

Voltage displayed should change. If not:

 

 

 

 

Failed IR Source

D8

 

IR_SOURCE

CO2_MEASURE

Faulty +12 VDC Supply (PS2)

IR SOURCE

Failed Relay Board

Green

 

 

 

Failed IR Photo-Detector

 

 

 

 

 

 

 

 

Failed Sync/Demod Board

 

 

 

 

Faulty Connectors/Wiring

Teledyne Analytical Instruments

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Page 245
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Teledyne gfc 7000ta operation manual Relay Board Status LED Failure Indications