AERCO Modulex EXT 321 - 1123 - Manual (Page 116)

MODULEX EXT 321, 481, 641, 802, 962, 1123 BOILERS
Installation, Operation & Maintenance Manual
Table 6-2: E8 Controller Fault Codes (Continued)
FAULT CODE FAULT DESCRIPTION
Communication Fault
E 90
E8: BUS addresses 0 and 1. The BUS codes 0 and 1 cannot be used at
the same time.
E 91
E8: BUS code occupied. The set BUS code is already used by another
appliance.
E 99 E8: Internal failure.
E 200 Communication Error HS1
E 201 Communication Error HS1
E 202 Communication Error HS1
E 203 Communication Error HS1
E 204 Communication Error HS1
E 205 Communication Error HS1
E 206 Communication Error HS1
E 207 Communication Error HS1
Internal Fault
E 81
E8: EEPROM fault. The invalid value has been replaced by the standard
value.
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