Graco Reactor 2 H-30 Repair Manual page 27

Error Location
Error Error Location Location
P7BX HCM
T2DA Heater A
334946C
Type Description
Type Type Description Description
Pressure Imbalance
B High
Low Temperature A
Cause Solution
Cause Cause Solution Solution
Pressure Ensure material flow is
difference between
equally restricted on both
A and B material material lines.
is greater than the
defined value.
Pressure Ensure that the pressure
imbalance is imbalance value, on the
defined too low. System Setup screen, is at
an acceptable maximum
pressure to prevent
unnecessary alarms and
abort dispenses.
Out of material. Fill tanks with material
Fluid leaking from Check if heater
heater inlet rupture and PRESSURE
disk. RELIEF/SPRAY valve are
plugged. Clear. Replace
rupture disk. Do not replace
with a pipe plug.
Feed system Check feed pump and
defective. hoses for blockage. Check
that feed pumps have
correct air pressure.
Flow is too high at Use a smaller mix chamber
current setpoint. that is rated for the unit
in use. If recirculating,
decrease flow or decrease
temperature setpoint.
Bad RTD or bad Swap A and B heater output
RTD placement
cables and RTD cables and
against heater. see if issue follows. If so,
replace RTD.
Bad heater Confirm resistance of
element. heater. Heater resistance
should be 9-12 Ω for 10
kW systems and 6-8 Ω for
15 kW systems. If out of
tolerance, replace heater
element.
Loose heater Check for loose heater
wires. element wires.
Troubleshooting
27