Teledyne API – Model T300/T300M CO Analyzer
Troubleshooting and Service
247
11.1.4.3.
RELAY BOARD STATUS LEDS
There are eight LEDs located on the Relay Board. The most important of which is D1,
which indicates the health of the I
2
C bus. If D1 is blinking the other faults following
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 11.1.3 and Appendix D).
Table 11-4: I
2
C Status LED Failure Indications
LED
FUNCTION
FAULT STATUS
INDICATED FAILURE(S)
D1
(Red)
I
2
C bus Health
(Watch Dog
Circuit)
Continuously ON
or
Continuously OFF
Failed/Halted CPU
Faulty Motherboard, Touchscreen or Relay Board
Faulty Connectors/Wiring between Motherboard,
Touchscreen or Relay Board
Failed/5 VDC Power Supply (PS1)
Figure 11-5:
Relay Board Status LEDs
06864D DCN7562
Содержание T300
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