TELEDYNE API T300M - Table 5-8. Relay Board Status LED Failure Indications; Figure 5-9. Relay Board Status Leds

120 Maintenance and Service 083730300A DCN8101
Figure 5-9. Relay Board Status LEDs
Table 5-8. Relay Board Status LED Failure Indications
LED FUNCTION
SIGNAL I/O PARAMETER
DIAGNOSTIC TECHNIQUE
ACTIVATED BY
VIEW RESULT
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