Ufly Controller and BCM for Modulex EXT
CHAPTER 8: TROUBLESHOOTING
OMM-0159_A
• 6/28/2022 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page
75
of
83
CODE
DESCRIPTION
EFFECT
CORRECTION
RESET
BMM: 22
Lack air for
ignition
Air pressure switch
does not close within
30 sec. in the ignition
cycle
Ignition retry after 60
second delay and
failure remains until 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, check the air pressure switch
wiring. If still not working, try
another air pressure switch. If
still not working, change the
BMM.
AUTOMATIC/M
ANUAL
BMM: 23
Unexpected
air flux
Air pressure switch
always active
Ignition is inhibited.
Disconnect the air proving switch.
If problem goes away, install a
new switch. If not, check the
wiring. If wiring is OK, change
BMM.
AUTOMATIC
BMM: 24
Low fan
speed
Modulating fan speed
failure: failed to reach
the correct speed
within 30 seconds
from starting of burner
ignition cycle.
Ignition retry after 60
second delay and
failure remains until
we have a successful
burner operation.
Check fan wiring.
AUTOMATIC/M
ANUAL
BMM: 26
High fan
speed
Modulating fan speed
failure: failed to stop
within 30 seconds
from end of operation
Ignition is inhibited.
Check fan wiring.
AUTOMATIC
BMM: 27
Lack of air
Air pressure switch
fault during the
ignition time
Restart pre-purge
timer. The failure
remains until we have
a successful burner
operation.
Check fan and wiring. Check air
proving switch and wiring.
AUTOMATIC
BMM: 30
Service
parameters
Alteration of the
operating parameters
caused by EMC
disturbances.
Ignition is inhibited.
Pump runs for 5 min at
max speed.
Re-program the settings. Contact
factory.
MANUAL - cycle
the power or
send reset
message.
BMM: 32
Low supply
tension
Mains supply voltage <
108 VAC.
Wait for proper line
voltage (>102 VAC).
Check input voltage. Try another
BMM.
AUTOMATIC
Summary of Contents for AERCO EXT
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