Graco Reactor 2 Repair Parts page 24

Troubleshooting
Error Location
Error Error Location Location
P4AX
HCM
P4BX HCM
P4FA ADM
24
Type Description
Type Type Description Description
High Pressure A
High Pressure B
A Pump Inlet Leak
Cause Cause Cause Solution
Solution Solution
System Pressure in the hose and
pressurized pumps will increase as
before allowing the system heats up.
heat to reach Turn on heat and allow
setpoint all zones to reach the
temperature setpoint
before turning on the
pumps.
Bad pressure Verify the ADM pressure
transducer reading and the analog
gauges at the manifold.
Replace transducer if
they do not match.
H-XP2 or
Alarm level is lower for
H-XP3 system
H-30, H-40 and H-50
configured as
than for H-XP2 and
H-30, H-40, or
H-XP3.. Ensure dial on
H-50
HCM is set to position
"3" for H-XP2 or "4" for
H-XP3.
System Pressure in the hose and
pressurized pumps will increase as
before allowing the system heats up.
heat to reach
Turn on heat and allow
setpoint
all zones to reach the
temperature setpoint
before turning on the
pumps.
Bad pressure Verify the ADM pressure
transducer reading and the analog
gauges at the manifold.
H-XP2 or
Alarm level is lower for
H-XP3 system
H-30, H-40 and H-50
configured as
than for H-XP2 and
H-30, H-40, or
H-XP3.. Ensure dial on
H-50
HCM is set to position
"3" for H-XP2 or "4" for
H-XP3.
Thermal Condition the drum
expansion material to the ambient
is occurring temperature of the
between the Reactor.
drum and Reactor
inlet
Damaged ISO Replace the ISO pump
pump inlet ball inlet ball and seat.
or seat
334946J