Hawk 1000 Section 6 — Diagnostics and Troubleshooting
Part No. 750-366 6-3
is indicated. When the system Pressure/Temperature drops below the “On Point”, load demand will again be
displayed.
Limits -This is an indication of the status of the running interlocks on the boiler.
External Interlock - Feedback input from external interlock. When there is a load demand, and the burner
switch and limits are closed, the HAWK 1000 has isolated contacts (2.5A @ 125VAC) for output to an
external interlock device (e.g. fresh air damper, circulating pump). The boiler will start once the external
interlock is proven.
Note: The external interlock must be jumped if not used
ALFCO - Assured Low Fire Cut-Off. An external isolated start-stop contact can be provided to shut down the
boiler. This contact will drive the boiler to low fire prior to shut down.
Note: The ALFCO must be jumped if not used.
6.1.3 System Information
Press <System Information> from the Main screen to access. This screen shows boiler identification
information, the currently loaded programs for the PLC and HMI, elapsed time and cycles since last startup,
and network address information.
Figure 6-3. System Information
6.1.4 PLC Info
Figure 6-4. PLC Info
This screen duplicates the L24 Status LEDs and in addition shows the current PLC firmware revision, serial
number, and PLC keyswitch position.
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