Troubleshooting; Preliminary Checks - IBC DC 23-84 Installation And Operating Instructions Manual

5.0 TROUBLESHOOTING

NOTE
This boiler is equipped with a
blocked vent shutoff system,
which closes the gas supply
upon detection of an irregular
venting condition.
TROUBLESHOOTING
DC SERIES COMBI BOILERS DC 23-84, DC 29-106, DC 33-124, DC 33-160
The troubleshooting section is divided into 4 sections:

5.1 Preliminary Checks

5.2 Electronic Components
5.3 Warnings and Faults
5.4 Other Faults
Often, a problem can be identified and solved through simple checks of the basics:
confirming the electrical power supply, gas flow and resetting the thermostat
control. To extend the cover of such preliminary checks, the boiler's control module
offers a clear visual display of the status of the various control circuit components.
Should a problem remain unsolved after applying the preliminary checks,
proceed to the detailed system review, using the Troubleshooting Guide. The
Guide covers potential error conditions as grouped into the following categories:
5.3.1 Warning Codes
5.3.2 Fault Codes
5.4.1 Burner does not Ignite
5.4.2 Burner Ignites Noisily
5.4.3 Burner Resonating
5.4.4 The Power is Reduced
5.4.5 No Space Heating
5.4.6 Indoor Temperature Does Not Reach Desired Temperature
5.4.7 No Hot Water (DHW)
5.4.8 Hot Water Does Not Reach Temperature
Below each section is a list of Symptoms, Diagnoses, and Remedies.
Also provided with this manual are a number of diagrams (see Section 6.0) for
use with troubleshooting including:
•
Electrical Wiring Diagrams
•
Boiler Component Layout Diagrams
5.1 PRELIMINARY CHECKS
The first step in troubleshooting this system should be a review of the Controller's
display screen. There are a number of diagnostic features incorporated in the
software that evaluate system integrity, display error conditions and provide initial
suggested remedial actions.
In addition to checking the display, the following list is a guideline for troubleshooting:
1. Confirm power to the boiler: check that control module display is on (e.g.
display is lit).
Check that boiler is not in a safety lockout.
2.
Ensure wiring is clean and secure.
3.
Check that gas is reaching the unit.
4.
Confirm water system is properly charged to 12 psig and pump is serviceable.
5.
5-1