CleaverBrooks CFC-500 Operation, Service And Parts Manual page 238

CB FALCON
Table 50. Alerts. (Continued)
Code
46 Low line frequency occurred
47 Invalid subsystem reset request occurred
48 Write large enumerated Modbus register value
49 Maximum cycle count was reached
50 Maximum hours count was reached
51 Illegal Modbus write was attempted
52 Modbus write attempt was rejected (NOT
53 Illegal Modbus read was attempted
54 Safety processor brown-out reset occurred
55 Application processor watchdog reset occurred
56 Application processor brown-out reset occurred
57 Safety processor watchdog reset occurred
58 Alarm was reset by the user at the control
Demand/Rate Command Faults
59 Burner control firing rate was > absolute max
60 Burner control firing rate was < absolute min rate
61 Burner control firing rate was invalid, % vs. RPM
62 Burner control was firing with no fan request
63 Burner control rate (nonfiring) was > absolute
64 Burner control rate (nonfiring) was < absolute
65 Burner control rate (nonfiring) was absent
66 Burner control rate (nonfiring) was invalid, % vs.
67 Fan off cycle rate was invalid, % vs. RPM
68 Setpoint was overridden due to sensor fault
69 Modulation was overridden due to sensor fault
70 No demand source was set due to demand
71-73 RESERVED
Fan Parameter Errors
74 Periodic Forced Recycle
75 Absolute max fan speed was out of range
76 Absolute min fan speed was out of range
77 Fan gain down was invalid
78 Fan gain up was invalid
79 Fan minimum duty cycle was invalid
80 Fan pulses per revolution was invalid
81 Fan PWM frequency was invalid
82-83 RESERVED
Modulation Parameter Errors
84 Lead Lag CH 4-20mA water temperature setting
85 No Lead Lag add stage error threshold was
86 No Lead Lag add stage detection time was
87 No Lead Lag drop stage error threshold was
88 No Lead Lag drop stage detection time was
750-265
Description
Table 50. Alerts. (Continued)
Code
89 RESERVED
90 Modulation output type was invalid
91 Firing rate control parameter was invalid
92 Forced rate was out of range vs. min/max
93 Forced rate was invalid, % vs. RPM
94 Slow start ramp value was invalid
95 Slow start degrees value was invalid
96 Slow start was ended due to outlet sensor fault
97 Slow start was end due to reference setpoint
98 CH max modulation rate was invalid, % vs. RPM
99 CH max modulation rate was > absolute max
100 CH modulation range (max minus min) was too
101 DHW max modulation rate was invalid, % vs.
102 DHW max modulation rate was > absolute max
103 DHW modulation range (max minus min) was too
104 Min modulation rate was < absolute min rate
105 Min modulation rate was invalid, % vs. RPM
106 Manual rate was invalid, % vs. RPM
107 Slow start enabled, but forced rate was invalid
108 Analog output hysteresis was invalid
109 Analog modulation output type was invalid
110 IAS open rate differential was invalid
111 IAS open step rate was invalid
112 MIX max modulation rate was invalid, % vs. RPM
113 MIX max modulation rate was >absolute max or
114 MIX modulation range (max minus min) was too
Modulation Operation Faults
115 Fan was limited to its minimum duty cycle
116 Manual rate was > CH max modulation rate
117 Manual rate was > DHW max modulation rate
118 Manual rate was < min modulation rate
119 Manual rate in Standby was > absolute max rate
120 Modulation commanded rate was > CH max
121 Modulation commanded rate was > DHW max
122 Modulation commanded rate was < min
123 Modulation rate was limited due to outlet limit
124 Modulation rate was limited due to Delta-T limit
125 Modulation rate was limited due to stack limit
126 Modulation rate was limited due to
127 Fan Speed out of range in RUN
128 Modulation rate was limited due to IAS was open
129 Slow start ramp setting of zero will result in no
130 No forced rate was configured for slow start
114
Description