Troubleshooting; Preliminary Checks - IBC VFC 15-150 Manual

5.0 TROUbLESHOOTING

TROUBLESHOOTING
VFC 15-150 - VFC 45-225 MODULATING GAS BOILERS
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
5.1
PreliMinarY CHeCKs
The first step in troubleshooting this system should be a review of the Controller's
lCd 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 (see Section 2.5.6 Error Mode.)
in addition to checking the display, the following list is a guideline for
troubleshooting:
Confirm power to the boiler: check that control module display is on (e.g.
1.
display is lit).
2. Check that boiler is not in a safety lockout.
ensure wiring is clean and secure.
3.
Check that gas is reaching the unit.
4.
5. Confirm water system is properly charged to 12 psig and pump is
serviceable.
5-1