CleaverBrooks CFC-500 Operation, Service And Parts Manual page 311

Table 10. Falcon alert codes
572 Heat exchanger high limit was exceeded
573 Heat exchanger high limit wasn't allowed due to
stack limit setting
574 Heat exchanger high limit wasn't allowed due to
stack connector setting
575 Heat exchanger high limit delay was not configured
for recycle response
576 CH pump output was invalid
577 DHW pump output was invalid
578 Boiler pump output was invalid
579 Auxiliary pump output was invalid
580 System pump output was invalid
581 Mix pump output was invalid
582-589 RESERVED
590 DHW plate preheat setpoint was invalid
591 DHW plate preheat ON hysteresis was invalid
592 DHW plate preheat OFF hysteresis was invalid
593 Tap detect degrees was out of range
594 Tap detect ON hysteresis was invalid
595 Inlet - DHW tap stop degrees was out of range
596 Outlet - Inlet tap stop degrees was out of range
Burner control states are provided in Table 11.
CB FALCON MODBUS COMMUNICATION
Table 11. Burner control states
State
0 Initiate
1 Standby Delay
2 Standby
3 Safe Startup
4 Prepurge - Drive to Purge Rate
5 Prepurge – Measured Purge Time
6 Prepurge – Drive to Lightoff Rate
7 Preignition Test
8 Preignition Time
9 Pilot Flame Establishing Period
10 Main Flame Establishing Period
11 Direct Burner Ignition
12 Run
13 Postpurge
14 Lockout
15 Prepurge (Fulton pulse)
16 Ignition (Fulton pulse)
17 Combustion Pressure Establish (Fulton pulse)
18 Combustion Pressure Stabilization (Fulton pulse)
19 Main Flame Stabilization (Fulton pulse)
255 Safety Processor Offline
The Falcon pump status codes are contained in the following
two tables. Table 12 is for older units (application build less
than 1600) and Table 13 is for newer units (application build
1600 or higher).
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