AERCO Modulex EXT 321 - 1123 - Manual (Page 120)

MODULEX EXT 321, 481, 641, 802, 962, 1123 BOILERS
Installation, Operation & Maintenance Manual
Table 6-4: BMM Fault Codes (Continued)
CODE DESCRIPTION EFFECT CORRECTION RESET
E 24
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.
Check fan wiring. AUTOMATIC/MANUAL
E 26
Fan speed out of
control: It
doesn't stop
within 30
seconds after
turned OFF.
Ignition is
inhibited.
Check fan wiring. AUTOMATIC
E 27
Air flow failure
during ignition.
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
E 30
Settings
corrupted.
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.
E 32
Line voltage too
low (<96 VAC).
Wait for
proper line
voltage (>102
VAC).
Check input voltage. Try
another BMM.
AUTOMATIC
E 40
Low water flow.
Low water flow
switch activated.
Burners
turned OFF. Check water flow or
check switch.
AUTOMATIC
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