CleaverBrooks CFC-500 Operation, Service And Parts Manual page 231

Code Description
50 Modulation fault
51 Pump fault
52 Motor tachometer fault
53 AC inputs phase reversed
54 Safety GVT model ID doesn't match
application's model ID
55 Application configuration data block CRC
errors
56-57 RESERVED
58 Internal fault: HFS shorted to IAS
59 Internal Fault: Mux pin shorted
Normal Event Status
60 Internal Fault: HFS shorted to LFS
61 Anti short cycle
62 Fan speed not proved
63 LCI OFF
64 PII OFF
65 Interrupted Airflow Switch OFF
66 Interrupted Airflow Switch ON
67 ILK OFF
68 ILK ON
69 Pilot test hold
70 Wait for leakage test completion
71-77 RESERVED
78 Demand Lost in Run
79 Outlet high limit
Table 49. Falcon Lockout and Hold Codes. (Continued)
Recommended Troubleshooting of Lockout Codes
Internal sub-system fault.
1. Review alert messages for possible trends.
2. Correct possible problems.
3. If fault persists, replace module.
1. Check the Module and display connections.
2. Check the Module power supply and make sure that
both frequency and voltage meet the specifications.
3. On 24Vac applications, assure that J4-10 and J8-2 are
connected together.
Internal Fault.
1. Reset Module.
2. If fault repeats, replace module.
Will not be a lockout fault. Hold Only.
1. Check wiring and correct any faults.
2. Check Interlocks connected to the LCI to assure proper
function.
3. Reset and sequence the module; monitor the LCI status.
4. If code persists, replace the module.
1. Check wiring and correct any faults.
2. Check Preignition Interlock switches to assure proper
functioning.
3. Check the valve operation.
4. Reset and sequence the module; monitor the PII status.
5. If code persists, replace the module.
1. Check wiring and correct any possible shorts.
2. Check airflow switches to assure proper functioning.
3. Check the fan/blower operation.
4. Reset and sequence the module; monitor the airflow
status.
5. If code persists, replace the module.
1. Check wiring and correct any possible shorts.
2. Check Interlock (ILK) switches to assure proper
function.
3. Verify voltage through the interlock string to the interlock
input with a voltmeter.
4. If steps 1-3 are correct and the fault persists, replace the
1. Verify Run/Test is changed to Run.
2. Reset Module.
3. If fault repeats, replace module.
1. Internal Fault. Reset Module.
2. If fault repeats, replace module.
1. Check wiring and correct any possible errors.
2. If previous steps are correct and fault persists, replace
the module.
1. Check wiring and correct any possible errors.
2. Replace the Outlet high limit.
3. If previous steps are correct and fault persists, replace
the module.
107
CB FALCON
NOTE
H
H
H
L
L
L
L
L
L
H
H
H
H or L
H or L
H or L
H or L
H or L
H
H
H
H or L
750-265