Ufly Controller and BCM for Modulex EXT
CHAPTER 8: TROUBLESHOOTING
OMM-0159_A
• 6/28/2022 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page
73
of
83
FAULT CODE
DESCRIPTION
EFFECT
CORRECTION
RESET
HCM: 40
Low water flowrate
Low system flow
rate.
Water flow is not
detected by sensor
connected to BCM
terminal Y2/FL-TA 20
seconds after the
Pump activation.
Burners turned OFF.
Check water flow or
check switch.
AUTOMATIC
HCM: 56
Heat control lack
BCM: No remote
control detected
It is possible to
activate burner
ignition from the
BCM manual request
button
HCM: 57
Burners lack
BCM: No BMM
detected
Burners turned OFF.
Check electrical
connections BMM
and e-BUS
AUTOMATIC
HCM: 58
Global temperature
sensor
BCM: Sensor global
flow detected.
Burners turned OFF.
Check the flow
sensor connection.
Replace the sensor.
AUTOMATIC
HCM: 73
Flow sensor
Water deficiency
pressure switch -
NOT APPLICABLE
HCM: 93
Security block
AUXILIARY SAFETY
INTERVENTION
Stop burner and stop
pump
check the jumper or
safety devices wired
to connector Y2,
terminals 11/2.
MANUAL
Summary of Contents for AERCO EXT
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