AERCO Modbus Communications Manual - Manual (Page 94)

GF-114
MODBUS
Communication
Appendix A
OMM-0035_0C USER MANUAL Status Messages & Equations
Page 94 of 200 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph.: 800-526-0288 05/18/12
Table A-6: BMM (Burner Management Module) Fault Codes
CODE DESCRIPTION EFFECT CORRECTION RESET
1
High Limit (STB)
Thermostat
activated
All burners
turned OFF and
Pump ON at
maximum speed.
Check FlowSensor thermal
connection to boiler.
MANUAL - push
reset switch
when
temperature goes
below limit.
2
Low Gas
Pressure
All burners
turned OFF .
Check gas pressure or gas
pressure switch.
AUTOMATIC -
when gas
pressure switch
closes.
4
No flame
detected at
burner start
Burner control
lockout.
Check flame rod or
combustion.
MANUAL - push
reset switch or
cycle power.
5
Flame loss during
run.
Ignition retry.
Check combustion and
wiring.
MANUAL - push
reset switch or
cycle power.
6
High outlet
temperature.
FlowSensor
temperature >
203°F.
All burners
turned OFF and
Pump ON at
maximum speed.
Check Flow Sensor or
system pump
AUTOMATIC -
when
FlowSensor <
176°F.
10 Internal Failure
Ignition is
inhibited.
Contact Factory for new
BCM.
MANUAL - cycle
the power.
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.
12 FlowSensor fault. All burners
turned OFF.
Check flow sensor or
wiring.
AUTOMATIC
13 Aux Sensor fault
The boiler will
operate from the
FlowSensor
without the
AuxSensor.
Check aux sensor or
wiring.
AUTOMATIC