MODULEX EXT 321, 481, 641, 802, 962, 1123 BOILERS
Installation, Operation & Maintenance Manual
Page
118
of
146
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0087_0F
07/13/15
Phone: 800-526-0288
GF-143
BMM (Burner Management Module) Fault Codes
6.1.3
The table below lists the fault codes and troubleshooting tips associated with the BMM.
Table 6-4: BMM Fault Codes
CODE
DESCRIPTION
EFFECT
CORRECTION
RESET
E 1
High Limit (STB)
Thermostat
activated.
All burners
turned OFF and
pump ON at
maximum speed.
Check flow sensor thermal
connection to boiler.
MANUAL - push
reset switch
when
temperature goes
below limit.
E 2
Low gas
pressure.
All burners
turned OFF.
Check gas pressure or gas
pressure switch.
AUTOMATIC -
when gas
pressure switch
closes.
E 4
No flame
detected at
burner start.
Burner control
lockout.
Check flame rod or
combustion.
MANUAL - push
reset switch or
cycle power.
E 5
Flame loss during
run.
Ignition retry.
Check combustion and
wiring.
MANUAL - push
reset switch or
cycle power.
E 6
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 10
Internal failure.
Ignition is
inhibited.
Contact factory for new
BMM.
MANUAL - cycle
the power.
E 11
Flame signal
detected before
ignition.
Ignition is
inhibited.
Disconnect flame rod wire
from BMM. If problem
goes away, change flame
rod and/or wire. If problem
does not go away, change
BMM.
MANUAL - push
reset switch or
cycle power.
E 12
Flow sensor fault. All burners
turned OFF.
Check flow sensor or
wiring.
AUTOMATIC
E 13
Aux sensor fault.
The boiler will
operate from the
Flow sensor
without the Aux
sensor.
Check aux sensor or
wiring.
AUTOMATIC