CleaverBrooks CFC-500 Operation, Service And Parts Manual page 232

CB FALCON
Code
80 DHW high limit
81 Delta T limit
82 Stack limit
83 Delta T exchanger/outlet limit
84 Delta T inlet/exchanger limit
85 Inlet/outlet inversion limit
86 Exchanger/outlet inversion limit
87 Inlet/exchanger inversion limit
88 Outlet T-rise limit
89 Exchanger T-rise limit
90 Heat exchanger high limit
Sensor Faults
91 Inlet sensor fault
92 Outlet sensor fault
93 DHW sensor fault
94 Header sensor fault
95 Stack sensor fault
96 Outdoor sensor fault
97 Internal Fault: A2D mismatch.
98 Internal Fault: Exceeded VSNSR voltage
99 Internal Fault: Exceeded 28V voltage
tolerance
100 Pressure Sensor Fault
750-265
Table 49. Falcon Lockout and Hold Codes. (Continued)
Description Recommended Troubleshooting of Lockout Codes
1. Check wiring and correct any possible errors.
2. Replace the DHW high limit.
3. If previous steps are correct and fault persists, replace
the module.
1. Check Inlet and Outlet sensors and pump circuits for
proper operation.
2. Recheck the Delta T Limit to confirm proper setting.
3. If previous steps are correct and fault persists, replace
the module.
1. Check wiring and correct any possible errors.
2. Replace the Stack high limit.
3. If previous steps are correct and fault persists, replace
the module.
1. Check wiring and correct any possible errors.
2. Replace the Inlet sensor.
3. If previous steps are correct and fault persists, replace
the module.
1. Check wiring and correct any possible errors.
2. Replace the Outlet sensor.
3. If previous steps are correct and fault persists, replace
the module.
1. Check wiring and correct any possible errors.
2. Replace the DHW sensor.
3. If previous steps are correct and fault persists, replace
the module.
1. Check wiring and correct any possible errors.
2. Replace the header sensor.
3. If previous steps are correct and fault persists, replace
the module.
1. Check wiring and correct any possible errors.
2. Replace the stack sensor.
3. If previous steps are correct and fault persists, replace
the module.
1. Check wiring and correct any possible errors.
2. Replace the outdoor sensor.
3. If previous steps are correct and fault persists, replace
the module.
Internal Fault.
1. Reset Module.
2. If fault repeats, replace module.
1. Verify the Pressure Sensor is a 4-20ma source.
2. Check wiring and correct any possible errors.
3. Test Pressure Sensor for correct operation.
4. Replace the Pressure sensor.
5. If previous steps are correct and fault persists, replace
the module.
108
NOTE
H or L
H or L
H or L
H or L
H or L
H or L
H or L
H or L
H or L
H or L
H or L
H
H
H
H
H
H
L
L
L
H