Relay Board Status Leds - Teledyne T300 Operation Manual

Teledyne API – Model T300/T300M CO Analyzer

12.1.4.3. RELAY BOARD STATUS LEDS

LED FUNCTION
2
I C bus Health
D1
(Watch Dog
(Red)
Circuit)
06864B DCN6314
There are eight LEDs located on the Relay Board. The most important of which is D1,
which indicates the health of the I
LEDs can be used in conjunction with DIAG menu signal I/O to identify hardware
failures of the relays and switches on the relay (see Section 12.1.3 and Appendix D).
2
Table 12-4: I C Status LED Failure Indications
FAULT STATUS
Continuously ON
or
Continuously OFF
Figure 12-5:
2
C bus. If D1 is blinking the other faults following
Failed/Halted CPU
Faulty Motherboard, Touchscreen or Relay Board
Faulty Connectors/Wiring between Motherboard,
Touchscreen or Relay Board
Failed/Faulty +5 VDC Power Supply (PS1)
Relay Board Status LEDs
Troubleshooting and Service
INDICATED FAILURE(S)
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