MODULEX EXT 321, 481, 641, 802, 962, 1123 BOILERS
Installation, Operation & Maintenance Manual
OMM-0087_0F AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 113 of 146
GF-143 Phone: 800-526-0288 07/13/15
CHAPTER 6: TROUBLESHOOTING
6.1 E8 Controller Error Codes
Fault codes are displayed in the upper right hand section of the E8 Controller display (see
Figure-6-1). Use Table 6-1 (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 6-2.
• BCM (Boiler Control Module): These fault codes are shown in Table 6-3.
• BMM (Burner Management Module): These fault codes are shown in Table 6-4.
Figure 6-1: E8 Error 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 6-2.
Displayed fault codes not listed in Table 6-2 refer to devices
other than the E8 controller, such as the Boiler Management
module (BMM) or Burner Controller Module (BCM). Use
Table 6-1 (and the formula described below the table) to
arrive at a fault number, which can be looked up in Tables 6-
3 and 6-4 for the fault description.
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