Graco ProMix PD2K Repair Parts page 22

Troubleshooting
Type Description
Code
P9D# Alarm Press. Sens.
Failed Outlet
#
P9F# Alarm Press. Sens.
Failed Inlet #
QADX Alarm Differential
Pressure A
Over B
QBDX Alarm Differential
Pressure B
Over A
22
Problem
Outlet pressure
transducer has failed.
Inlet pressure transducer
has failed.
Low differential pressure.
This alarm is active only
during Mix mode.
High differential
pressure. This alarm
is active only during Mix
mode.
Cause
Outlet pressure
transducer has failed
or the pressure is above
the readable range.
Inlet pressure transducer
has failed or the pressure
is above the readable
range.
There is a leak on the B
side.
The B side pump is
cavitating.
There is a leak on the A
side.
The A side pump is
cavitating.
Solution
Relieve system pressure.
Verify connections, or
replace if reconnecting
does not eliminate the
alarm.
Relieve system pressure.
Verify connections, or
replace if reconnecting
does not eliminate the
alarm.
Check the system for
internal and external
leaks on all catalyst
manifolds and plumbing.
Check paint supply on
the B side, increase paint
supply pressure.
Check the system for
internal and external
leaks on all color
manifolds and plumbing.
Check paint supply on
the A side, increase paint
supply pressure.
332709D