AERCO BMK 3.0 LN Natural Gas July 2011 - Manual (Page 59)

TROUBLESHOOTING
8-1
Chapter 8 - TROUBLESHOOTING GUIDE
8.1 INTRODUCTION
This troubleshooting guide is intended to aid
service/maintenance personnel in isolating the
cause of a fault in a Benchmark 3.0 Boiler. The
troubleshooting procedures contained herein are
presented in tabular form on the following
pages. These tables are comprised of three
columns labeled: Fault Indication, Probable
Cause and Corrective Action. The numbered
items in the Probable Cause and Corrective
Action columns correspond to each other. For
example, Probable Cause No. 1 corresponds to
Corrective Action No. 1, etc.
NOTE:
The front panel of the C-More Control Box
contains an RS232 port which can be interfaced
to a laptop computer or other suitable device.
This RS232 communication feature permits
service personnel to view menu items and data
logs which can be useful in isolating faults. Refer
to Chapter 9 of this manual for detailed RS232
communication set-up and procedures.
When a fault occurs in the Benchmark Boiler,
proceed as follows to isolate and correct the
fault:
1. Observe the fault messages displayed in the
Control Box display.
2. Refer to the Fault Indication column in
Troubleshooting Table 8-1 which follows and
locate the Fault that best describes the
existing conditions.
3. Proceed to the Probable Cause column and
start with the first item (1) listed for the Fault
Indication.
4. Perform the checks and procedures listed in
the Corrective Action column for the first
Probable Cause candidate.
5. Continue checking each additional Probable
Cause for the existing fault until the fault is
corrected.
6. Paragraph 8.2 and Table 8-2 contain
additional troubleshooting information which
may apply when no fault message is
displayed.
7. If the fault cannot be corrected using the
information provided in the Troubleshooting
Tables, contact your local AERCO
Representative.