5-1
TROUBLESHOOTING
SL 35-199, SL 45-260 MODULATING GAS BOILERS
5.0 TROUBLESHOOTING
The troubleshooting section is divided into 3 sections:
5.1 Preliminary Checks
5.2 Electronic Components
5.3 Troubleshooting Guide
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 Using Control Module Errors Displayed
5.3.2 Ignition Problems
5.3.3 Cycling Problems
5.3.4 Temperature Problems
5.3.5 Miscellaneous
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
•
Sequence of Operations Flowchart
•
Boiler Component Layout Diagrams
PRELIMINARY CHECKS
The first step in troubleshooting this system should be a review of the Controller’s
Touch 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. The Touch Screen controller’s display will be fully functional in
90 seconds after power is restored to the boiler.)
2.
Check that boiler is not in a safety lockout.
3.
Ensure wiring is clean and secure.
4.
Check that gas is reaching the unit.
5.
Confirm water system is properly charged to 12 psig and pump is
serviceable.
ELECTRONIC COMPONENTS
5.1
NOTE
This boiler is equipped with a
blocked vent shutoff system,
which closes the gas supply
upon detection of an irregular
venting condition. In such
event, the electronic controller
will automatically carry out a
reset/ retry every 5 minutes.
See Section 5.3.1 Airflow Error
for Troubleshooting steps.
Summary of Contents for SL 35-199
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