Troubleshooting
Error
Code
Error
Location
Type Name Cause Solution
MBN0 MCM ADVI-
SORY
Motor Brush
Wear
Brushes have worn
down and need
replacing.
Replace Brushes. See
system repair manual.
MMUX USB ADVI-
SORY
USB Log Full USBlogs have reached
a level were data loss
will occur if logs are not
downloaded.
Use a USB driveand
download all logs.
System pressurized
before allowing heat to
reach setpoint.
Turnon the heat and allow
thehosetor
each the
setpoint before turning on
the pumps.
Bad pressure
transducer.
Verify the ADM pressure
readingthe analog gauges
at the manifold. Replace
transducers if they do not
match. See system repair
manual.
P4AX
P4BX
MCM ALARM Over Pressure A
Over Pressure B
E-XP2i system
configured as E-30i.
Ensure rotary switch on
MCM is set to position 0
for E-30i.
Loose/bad connection. Check to ensure the
pressure transducer is
properly installed and
all wires are properly
connected.
P6AX
P6BX
MCM ALARM Pressure
Transducer
Fault A
Pressure
Transducer
Fault B Bad sensor. Check if the error
follows the transducer.
Disconnect transducer
cable from #8 and #9
connectors on MCM.
ReverseAandB
connections and check
if the error follows. If
the error follows the
transducer, replace the
pressure transducer. See
system repair manual. If
the error does not follow,
replace MCM. See system
repair manual.
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