Watts Aerco Modulex MLX EXT 1530 - Page 118

Modulex EXT Commercial Series Boilers User Manual
CHAPTER 7: Troubleshooting
Page 118 of 144 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0095_0H
09/15/2017 Phone: 800-526-0288 GF-139
TABLE 7-4: BMM Fault Codes
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