AERCO Modulex E8 Controller (and BCM) For Modulex EXT Boilers - Manual (Page 106)

E8 Controller and BCM for Modulex EXT
Installation, Operation & Maintenance Manual
CHAPTER 10: E8, BCM, AND BMM FAULT CODES
Page 106 of 108 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0093_0A
PRI: 06/24/2013 Phone: 800-526-0288 GF-136-C
Table 10-4: BMM Fault Codes (Continued)
CODE DESCRIPTION EFFECT CORRECTION RESET
14
Return Sensor
fault
All burners
turned OFF.
Check return sensor or
wiring.
AUTOMATIC
15
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.
16
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.
20
Flame signal
detected after
burner is OFF.
Ignition is
inhibited.
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.
22
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.
AUTOMATIC/
MANUAL
23
The air pressure
switch doesn't
switch off.
Ignition is
inhibited.
Disconnect the air proving
switch. If problem goes
away install a new switch. If
not, check the wiring. If
wiring OK then change
BMM.
AUTOMATIC