AERCO Modulex E8 Controls Guide - Manual (Page 109)

PR1: 11/30/12 Page 109 of 112
GF-115-C Modulex E8 Controller and BCM
Operations and Maintenance Manual
OMM-0084_0D
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526- 0288
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/MAN
UAL
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