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Benchmark 2500DF-3000DF Installation, Operation & Maintenance Manual
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 3000 MBH boiler. The troubleshooting procedures contained herein are presented in
tabular form on the following pages.
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.
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 unit, 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. Section 8.2 and Table 8-2 contain additional troubleshooting information which may apply
when a no fault message is displayed.
If the fault cannot be corrected using the information provided in the Troubleshooting Tables, contact your
local AERCO Representative.
OMM-0099_0A
GF-145
CHAPTER 8 – TROUBLESHOOTING GUIDE
These tables are comprised of three columns labeled: Fault
NOTE
Isolation and Correction of Faults
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Ph.: 800-526-0288
Page 103 of 234
PR1: 05/21/2014
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