Honeywell DBC2000 Series - TROUBLESHOOTING AND ERROR HANDLING; Error Types and Safe Shutdown Procedures; Using LEDs for Fault Diagnosis

ENI7003R8 KO65 2013
14
7. TROUBLE SHOOTING
ERROR TYPES AND SAFE SHUTDOWN
If a critical error related to safety operation (such as a loss of flame, opening of the air flow switch during the
ignition trial and run sequence) is detected, the DBC2000 instantly goes into lock-out and goes to pre-purge status.
If a non critical error is detected (such as opening of the air flow switch during post-purge), DBC2000 holds the
sequence during the lock-out time, allowing time for the error to rectify, and then goes into lock- out.
For all types of errors, the status LEDs indicate the status information to the operator.
Fig. 6 to Fig. 13 show the sequence of DBC2000 in case of some error. And Table 8 shows the status of LEDs for
each error.
The product handbook (ENS7003) shows the different scenarios for possible failures.