ProtoNode FPC-N34 & FPC-N35 User Manual
APPENDIX H: FAULT CODES FOR MODULEX E8 CONTROLLER
OMM-0150_B • 5/20/2021 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 127 of 140
Table H-2: BMM Fault Code Table
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.
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.
Flame signal
detected after burner
is OFF.
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.
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.
The air pressure
switch doesn't switch
off.
Disconnect the air proving
switch. If problem goes
away install a new switch.
If not, check the wiring. If
wiring OK then change
BMM.
Fan speed out of
control: It doesn't
reach pre-purge
speed within 30
seconds.
Ignition retry after
60 second delay
and failure remains
until we have a
successful burner
operation.
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