Aerco MODULEX EXT 321 User Manual

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

Aerco MODULEX EXT 321 Specifications

General

Brand	Aerco
Model	MODULEX EXT 321
Category	Boiler
Language	English