Honeywell DBC2000 Series Product Handbook

ENS7003R0 KO06 2010
2. 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 (such as opening of the air flow switch opening during post-purge) is detected, DBC2000 holds the
sequence for lock-out time 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.5 shows the status of LEDs for each
error.
Ignition Trial
CONTROLLER ON
POWER SW ON
Post-Purge
Lockout
20 SEC
BLOWER
IGNITION TR
PILOT VALVE
MAIN VALVE
ALARM
HIGH
LOW
DAMPER
AIR FLOW SW
FLAME SIGNAL
POWER
PRE/POST-PURGE
IGNITION TRIAL
PILOT ONLY
M-TRI/M-STA
RUN
FLAME
ALARM
I
N
D
I
C
A
T
I
O
N
L
O
A
D
Fig. 6: Failure to ignite the pilot

Honeywell DBC2000 Series Specifications

General

Brand	Honeywell
Model	DBC2000 Series
Category	Controller
Language	English