MC2: 10/03/12 Page 65 of 90
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
CHAPTER 10: TROUBLE SHOOTING GUIDE
10.1 Introduction
This troubleshooting guide is intended to aid service/maintenance personnel in isolating the cause of a
fault in a Modulex Boiler. In the event of an operational failure, the controller used with Modulex boilers
will display a code to indicate the failure type. Troubleshooting procedures are presented in tabular form
on the following pages. The 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 Modulex Boiler, proceed as follows to isolate and correct the fault:
1. Observe the fault code (E1, E2, E3, etc.) displayed in the controller display (Figure 9-1).
2. Refer to the Fault Indication column in Troubleshooting Tables, which follow, 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 corrected.
6. Table 9-2, found at the end of this section, contains additional troubleshooting information which may
apply when no fault code is displayed.
NOTE
If the fault cannot be corrected using the information provided in the
Troubleshooting Tables, contact your local AERCO Representative.
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