High Current Triac Option
Figure 5. Location of Power, Watchdog, RXD & TXD LEDs
The Power LED (refer Figure 5) lights when the processor board has
power. If this LED flashes, this indicates that the processor has a fault on
the processor power supply.
The Watchdog LED (refer Figure 5) lights only if the watchdog circuit has
been triggered, thereby indicating that a processor fault has occurred.
The TXD and RXD LEDs (refer Figure 5) indicate polling of communications
to/from a controller. The RXD LED flashes whenever any communications
polling is received and the TXD LED flashes whenever the C4000
processor responds to polls for its respective pump number(s).
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