BMK 750-3k Platinum Boiler OPERATION, SERVICE, and MAINTENANCE GUIDE
SECTION 6 – TROUBLESHOOTING GUIDE
OMM-0116_0A
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
Page
73
of
178
GF-201
Ph.: 800-526-0288
03/15/2017
SECTION 6:
TROUBLESHOOTING GUIDE
6.1 INTRODUCTION
This troubleshooting guide is intended to aid service/maintenance personnel in isolating the cause of a
fault in Benchmark 750 through 3000 boilers. 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.
When a fault occurs in the unit, proceed as follows to isolate and correct the fault:
FAULT CORRECTION Instructions
1. Observe the fault messages displayed in the Control Box display.
2. Refer to the Fault Indication column in Troubleshooting Table 6-1 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 6-2 contains 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.
NOTE:
The front panel of the C-More Control Box contains an RS232 port. This port is used only by factory-
trained personnel to monitor onAER communications via a portable computer.
