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Modulex EXT Commercial Series
CHAPTER 8: Maintenance Schedule
OMM-0160_A
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95
of
117
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/
MANUAL
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/
MANUAL
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
Содержание AERCO MLX EXT 1500 2S
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