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Troubleshooting and Service Teledyne API Model T360/T360M Operation Manual
234
Table 8-5: Relay Board Status LED Failure Indications
SIGNAL I/O PARAMETER
LED FUNCTION
ACTIVATED BY VIEW RESULT
DIAGNOSTIC TECHNIQUE
D2
Yellow
WHEEL
HEATER
WHEEL_HEATER WHEEL_TEMP
Voltage displayed should change. If not:
Failed Heater
Faulty Temperature Sensor
Failed AC Relay
Faulty Connectors/Wiring
D3
Yellow
BENCH
HEATER
BENCH_HEATER BENCH_TEMP
Voltage displayed should change. If not:
Failed Heater
Faulty Temperature Sensor
Failed AC Relay
Faulty Connectors/Wiring
D4
Yellow
SPARE
N/A N/A
N/A
D5
Green
SAMPLE/CAL
GAS VALVE
OPTION
CAL_VALVE 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
D6
Green
ZERO/SPAN
GAS VALVE
OPTION
SPAN_VALVE N/A
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
D7
Green
SHUTOFF
VALVE OPTION
SHUTOFF_VALVE N/A
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
D8
Green
IR SOURCE
IR_SOURCE CO
2
_MEASURE
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
07272B DCN6552