Chapter 8. Troubleshooting Guide; Introduction - Watts Aerco BENCHMARK 750 User Manual

Benchmark 750 – 1000 Boiler User Manual - INTERNATIONAL
CHAPTER 8.

8.1 INTRODUCTION

This troubleshooting guide is intended to aid service/maintenance personnel in isolating the
cause of a fault in Benchmark 750 and 1000 Heating 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:
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.
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.
OMM-0119_0A
GF-130-I
CHAPTER 8 – TROUBLESHOOTING GUIDE
TROUBLESHOOTING GUIDE
Fault Correction
NOTE
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Ph.: 800-526-0288
Page 99 of 170
11/03/2016