Error Condition And Led Status - Honeywell DBC2000E10 Series Handbook

Sequence
Safety limits opened at any time (no voltage present at T18 (STD model) or
All
T19 (ENH/ULT model)
Air flow switch remains ON (closed) for more than 5 minutes, or START position
interlock switch remains OFF(opened) for more than 5 minutes.
Standby (*2)
Flame signal is present
Blower motor is energized
Air flow switch remains OFF for more than 5 minutes after the heat demand has
started.
PURGE position interlock switch remains OFF for more than 5 minutes after the heat
demand started.
Both PURGE and START position interlocks ON at the same time during prepurge
period
Pre-purge
START position interlock remains OFF more than 5 minutes after pre-purge has
finished
Air flow switch goes ON within 5 minutes after the heat demand started, but air flow
switch goes OFF again.
Flame signal is present.
Air flow switch goes OFF
Ignition Standby
Flame signal is present
Air flow switch goes OFF
Pilot Ignition
Ignition failure (flame signal is not present after ignition-trial).
Air flow switch goes OFF
Pilot only
No flame signal
Air flow switch goes OFF
Main ignition
No flame signal
Air flow switch goes OFF
Main ignition
Stabilization
No flame signal
Air flow switch goes OFF
Run
No flame signal
No power is supplied to Terminal 3 because of internal relay contact failure.
Flame signal is present for more than 10 seconds after heat demand has ended.
Post-purge
Air flow switch keeps ON more than 5 minutes after post-purge.
1. Line voltage out of specs for more than 2 seconds
2. Line frequency out of range for more than 2 seconds
All
3. Excessive noise on power line or in the area
4. Internal device problem: CPU clock out of sync
○
*1 : For LED indication, means 'off',
The LEDs are arranged in the following order: Standby, Purge, Ignition, Pilot, Main, Modulate, Flame and Alarm at the left
front side of the DBC2000.
*2 : If an error occurs during Standby, the DBC2000 will not lock-out but LEDs indicate the current error status.
In this case, the DBC2000 cannot start before the error is resolved.
Table 8: Error condition and LED status
Error condition
●
◐
means 'illuminated', means 'blinking'.
22
Indicator LED
status (*1)
●○○○○○○◐
●◐○○○○○◐
●○○○○○◐◐
●◐○◐◐○○◐
●◐○○○○○◐
●◐◐◐○○○◐
●◐◐◐○○○◐
●◐◐◐○○○◐
●◐○○○○○◐
●◐○○○○◐◐
●◐○○○○○◐
●◐○○○○◐◐
●◐◐○○○○◐
●○◐○○○○◐
●◐○◐○○○◐
●○○◐○○◐◐
●◐○○◐○○◐
●○○○◐○◐◐
●◐○○◐○○◐
●○○○◐○◐◐
●◐○○○◐○◐
●○○○○◐◐◐
●◐○◐◐○○◐
●○○○○○◐◐
●◐○○○○○◐
●○○○○○○●
ENS7003R16 KO65 2013