Teledyne API – Technical Manual - Model 300E Family CO Analyzers

Troubleshooting & Repair

 

 

 

Table 13-5:

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

 

 

 

 

Failed Heater

 

Wheel Heater

WHEEL_HEATER

WHEEL_TEMP

Faulty Temperature Sensor

 

Yellow

 

 

 

 

 

Failed AC Relay

 

 

 

 

 

 

 

 

 

 

 

 

Faulty Connectors/Wiring

 

 

 

 

 

 

Voltage displayed should change. If not:

 

D3

 

 

 

 

Failed Heater

 

Bench Heater

BENCH_HEATER

BENCH_TEMP

Faulty Temperature Sensor

 

Yellow

 

 

 

 

 

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 Gas

 

 

 

Failed Valve

 

CAL_VALVE

N/A

Failed Relay Drive IC on Relay Board

 

Green

Valve Option

 

 

 

 

Failed Relay Board

 

 

 

 

 

 

 

 

 

 

 

 

Faulty +12 VDC Supply (PS2)

 

 

 

 

 

 

Faulty Connectors/Wiring

 

 

 

 

 

 

Zero/Span Valve should audibly change states. If

 

 

 

 

 

 

not:

 

D6

Zero/Span Gas

 

 

 

Failed Valve

 

SPAN_VALVE

N/A

Failed Relay Drive IC on Relay Board

 

Green

Valve Option

 

 

 

 

Failed Relay Board

 

 

 

 

 

 

 

 

 

 

 

 

Faulty +12 VDC Supply (PS2)

 

 

 

 

 

 

Faulty Connectors/Wiring

 

 

 

 

 

 

Shutoff Valve should audibly change states. If not:

 

 

 

 

 

 

Failed Valve

 

D7

Shutoff Valve

SHUTOFF_VALVE

N/A

Failed Relay Drive IC on Relay Board

 

Green

Option

Failed Relay Board

 

 

 

 

 

 

 

 

 

 

Faulty +12 VDC Supply (PS2)

 

 

 

 

 

 

Faulty Connectors/Wiring

 

 

 

 

 

 

Voltage displayed should change. If not:

 

 

 

 

 

 

Failed IR Source

 

D8

 

 

 

 

Faulty +12 VDC Supply (PS2)

 

IR SOURCE

IR_SOURCE

CO_MEASURE

Failed Relay Board

 

Green

 

 

 

 

 

Failed IR Photo-Detector

 

 

 

 

 

 

 

 

 

 

 

 

Failed Sync/Demod Board

 

 

 

 

 

 

Faulty Connectors/Wiring

 

 

 

 

 

 

 

 

04288D DCN5752

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Teledyne M300EM operation manual Table, Relay Board Status LED Failure Indications