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Troubleshootin
g
Error
Code
Error
Location
Type Name
Cause Solution
MBN0
MCM
ADVI-
SORY
Motor Brush
Wear
Brushes have worn
down and need
replacing.
Replace Brush
es. See
system repair
manual.
MMUX
USB
ADVI-
SORY
USB Log Full USB logs have
reached
a level were d
ata loss
will occur if
logs are not
downloaded.
Use a USB driv
eand
download all
logs.
System pressurized
before allowing heat to
reach setpoint.
Turn on the h
eat and allow
thehosetor
each the
setpoint be
fore turning on
the pumps.
Bad pressu
re
transduce
r.
Verify the ADM pressure
reading the 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
follo
ws the transducer.
Disco
nnect transducer
cable
from #8 and #9
conn
ectors on MCM.
Reve
rseAandB
conn
ections and check
if th
e error follows. If
the e
rror follows the
tran
sducer, replace the
pre
ssure transducer. See
sys
tem repair manual. If
the
error does not follow,
rep
lace MCM. See system
rep
air manual.
3A1705J 79