AERCO Modulex EXT 321 - 1123 - Manual (Page 117)

MODULEX EXT 321, 481, 641, 802, 962, 1123 BOILERS
Installation, Operation & Maintenance Manual
BCM (Boiler Communications Module) Fault Codes 6.1.2
The table below lists the fault codes and troubleshooting tips associated with the BCM.
Table 6-3: BCM Fault Codes
CODE DESCRIPTION EFFECT CORRECTION RESET
E 17
Boiler pipe is frozen.
Flow sensor temp. is
36°F or less. Ignition is
inhibited. Pump
runs for 5 min at
max speed. Carefully
defrost boiler. AUTOMATIC - when Flow
sensor is greater than 41°F.
E 18
Maximum Δ-
temperature protection.
Flow temperature -
Return Temperature >
Water
Δ-Temp
Protection + 50°F
All burners turned
OFF and Pump
ON at maximum
speed. Check the
system
installation. AUTOMATIC -
when Δ-
temperature < Water Δ-
Temp Protection.
E 19
High outlet
temperature. Flow
sensor temperature >
203°F. All burners turned
OFF and pump
ON at maximum
speed. Check Flow
Sensor or
system pump. AUTOMATIC - when Flow
sensor < 176°F.
E 37 BCM: Internal fault
E 38
Settings corrupted by
electromagnetic
interference.
Ignition is
inhibited. Pump
runs for 5 min at
max speed. Re-program
the settings.
Contact
factory.
MANUAL - push reset
switch or cycle power.
E 56
BCM: No remote
control detected
E 57
BCM: No BMM
detected
E 58
BCM: Sensor global
flow detected. Ignition is
inhibited. Close request
input for
manual
operation. MANUAL - push reset
switch or cycle power.
OMM-0087_0E AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 117 of 148
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