AERCO Modbus Communications Manual - Manual (Page 95)

Appendix A
MODBUS
Communication GF-114
Status Messages & Equations USER MANUAL OMM-0035_0C
05/18/12 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288 Page 95 of 200
Table A-6: BMM (Burner Management Module) Fault Codes (Continued)
CODE DESCRIPTION EFFECT CORRECTION RESET
14
Return Sensor
fault
All burners
turned
OFF.
Check return sensor or
wiring.
AUTOMATIC
15
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.
16
Boiler Pipe is
frozen.
FlowSensor
temperature is
36°F or less.
Ignition is
inhibited.
Pump runs
for 5 min at
max speed.
Carefully defrost boiler
AUTOMATIC - when
FlowSensor is greater
than 41°F.
20
Flame signal
detected after
burner is OFF.
Ignition is
inhibited.
Disconnect gas valve wire
from BMM. If failure goes
away, check wiring or
change BMM. If failure
remains check or change
gas valve.
MANUAL - push reset
switch or cycle power.
22
No air flow at
burner after fan
started for 30
seconds.
Ignition
retry after
60 second
delay and
failure
remains
until we
have a
successful
burner
operation.
If fan is stopped, check
supply voltage and fan
wiring. If OK try another
fan. If still not working
change the BMM.
If fan is not stopped, check
the exhaust gas outlet for
blockage. If OK then check
the air pressure switch
wiring. If still not working
try another air pressure
switch. If still not working,
change the BMM.
AUTOMATIC/MANUAL
23
The air pressure
switch doesn't
switch off.
Ignition is
inhibited.
Disconnect the air proving
switch. If problem goes
away install a new switch.
If not, check the wiring. If
wiring OK then change
BMM.
AUTOMATIC