Modulex EXT Commercial Series Boilers User Manual
CHAPTER 7: Troubleshooting
OMM-0095_0H AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 109 of 144
GF-139 Phone: 800-526-0288 09/15/2017
CHAPTER 7: TROUBLESHOOTING
7.1 E8 CONTROLLER FAULT CODES
Fault codes are displayed in the upper right hand section of the E8 Controller display (see
Figure 7-1). Use Table 7-1 (next page) to determine the fault message. There are codes for the
following three different devices:
• E8 Controller: These are divided into four basic categories: PCB element faults, system
manager faults, communication faults, and internal faults. These fault codes are shown in
Table 7-2.
• BCM (Boiler Control Module): These fault codes are shown in Table 7-3.
• BMM (Burner Management Module): These fault codes are shown in Table 7-4.
Figure 7-1: E8 Fault Code Location
NOTE:
When interpreting fault codes in the E8 display that refer to the E8 controller itself, the code
number is directly referenced to a fault description in Table 7-2.
Displayed fault codes not listed in Table 7-2 refer to devices other than the E8 controller, such
as the Boiler Management module (BMM) or Burner Controller Module (BCM). Use Table 7-1
(and the formula described below the table) to arrive at a fault number, which can be looked up
in Tables 7-3 and 7-4 for the fault description.
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