CB FALCON MODBUS COMMUNICATION
33
128 Fan speed failed during prepurge
Hold/
Lockout
129 Fan speed failed during preignition
Hold/
Lockout
130 Fan speed failed during ignition
Hold/
Lockout
131 Fan movement detected during standby Hold
132 Fan speed failed during run Hold
133-135 RESERVED
136 Interrupted Airflow Switch failed to close Hold
137 ILK failed to close Hold
138-142 RESERVED
143 Internal fault: Flame bias out
of
range
1 Lockout
144 Internal fault: Flame bias out
of
range
2 Lockout
145 Internal fault: Flame bias out
of
range
3 Lockout
146 Internal fault: Flame bias out
of
range
4 Lockout
147 Internal fault: Flame bias out
of
range
5 Lockout
148 Internal fault: Flame bias out
of
range
6 Lockout
149 Flame detected
Hold/
Lockout
150 Flame not detected Hold
151 High fire switch ON
Hold/
Lockout
152 Combustion pressure ON
Hold/
Lockout
153 Combustion pressure OFF
Hold/
Lockout
154 Purge fan switch ON
Hold/
Lockout
155 Purge fan switch OFF
Hold/
Lockout
156 Combustion pressure and Flame ON
Hold/
Lockout
157 Combustion pressure and
Flame
OFF
Lockout
158 Main valve ON Lockout
159 Main valve OFF Lockout
160 Ignition ON Lockout
161 Ignition OFF Lockout
162 Pilot valve ON Lockout
163 Pilot valve OFF Lockout
164 Block intake ON Lockout
165 Block intake OFF Lockout
166-171 RESERVED
172 Main relay feedback incorrect Lockout
173 Pilot relay feedback incorrect Lockout
174 Safety relay feedback incorrect Lockout
175 Safety relay open Lockout
176 Main relay ON at safe start check Lockout
177 Pilot relay ON at safe start check Lockout
178 Safety relay ON at safe start check Lockout
179-183 RESERVED
Table 8. Falcon lockout and hold codes Table 8. Falcon lockout and hold codes
81 Delta T inlet/outlet limit
Hold/
Lockout
82 Stack limit
Hold/
Lockout
83 Delta T exchanger/outlet limit
Hold/
Lockout
84 Delta T inlet/exchanger limit
Hold/
Lockout
85 Inlet/outlet inversion limit
Hold/
Lockout
86 Exchanger/outlet inversion limit
Hold/
Lockout
87 Inlet/exchanger inversion limit
Hold/
Lockout
88 Outlet T-rise limit
Hold/
Lockout
89 Exchanger T-rise limit
Hold/
Lockout
90 Heat exchanger high limit
Hold/
Lockout
91 Inlet sensor fault Hold
92 Outlet sensor fault Hold
93 DHW sensor fault Hold
94 S2 (J8-6) sensor fault Hold
95 Stack sensor fault Hold
96 S5 (J8-11) sensor fault Hold
97 Internal fault: A2D mismatch Lockout
98
Internal fault: Exceeded VSNSR
voltage tolerance
Lockout
99
Internal fault: Exceeded 28V
voltage tolerance
Lockout
100 Pressure sensor fault Hold
101-104 RESERVED
105 Flame detected out of sequence
Hold/
Lockout
106 Flame lost in MFEP Lockout
107 Flame lost early in run Lockout
108 Flame lost in run Lockout
109 Ignition failed Lockout
110 Ignition failure occurred Hold
111 Flame current lower than WEAK
threshold
Hold
112 Pilot test flame timeout Lockout
113 Flame circuit timeout Lockout
114-121
RESERVED
122 Lightoff rate proving failed Lockout
123 Purge rate proving failed Lockout
124 High fire switch OFF Hold
125 High fire switch stuck ON Hold
126 Low fire switch OFF Hold
127 Low fire switch stuck ON Hold
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