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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
Repair Motor Brushes,
page 59
.
MMUX
USB
ADVI-
SORY
USB Log Full
USB logs have reached
a level were data loss
will occur if logs are not
downloaded.
Use a USB drive and
download all logs.
System pressurized
before allowing heat to
reach setpoint.
Turn on the heat and allow
the hose to reach the
setpoint before turning on
the pumps.
P4AX
P4BX
MCM
ALARM
Over Pressure A
Over Pressure B
Bad pressure
transducer.
Verifythe ADM pressure
reading the analog gauges
at the manifold. Replace
transducers if theydo
not match. See
Replace
Transducers, page 65
.
Loose/bad connection.
Check to ensure the
pressure transducer is
properlyinstalled 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. Discon-
nect transducer cable from
#8 and #9 connectors on
MCM. Reverse A and B
connections and check if
the error follows. If the er-
ror follows the transducer,
replace the pressure
transducer. See
Replace
Transducers, page 65
.
If the error does not fol-
low, replace MCM. See
Replace Motor Control
Module (MCM), page 86
.
3A1706K
19
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