Graco Reactor A-20, Repair Parts

Page: 10 / 48

Troubleshooting
10 311512A
Hose Heat
Air motor doesn’t move with air pres-
sure applied Reversing switch failed Inspect and repair parts; see page
32.
Solenoid valve failed Replace valve.
Pump movement speed is erratic Worn air motor seals Replace seals; see page see page
32.
Worn pump seals Replace seals; see Pump manual.
Worn solenoid valve seals Replace solenoid valve; see pages
16 and 32.
PROBLEM CAUSE SOLUTION
PROBLEM CAUSE SOLUTION
Hose temperature controller display
flashing “SbEr” and “H20.0” FTS not connected. Control does not
see thermocouple. Check and connect FTS connector at
each joint; see page 20.
Hose temperature controller display
dropping with hose switch green light
on Hose power-lock connector loose Connect hose power-lock at Reactor
Check and reconnect all connector
points along hose. Use wire tie to
hold together.
Hose heat switch green light goes out Hose over-temperature shutdown Measure hose for proper amperage.
Repair or replace hose power con-
trollers. See page 22. Reset
over-temperature hose control knob
to START.
Set Point 2 (SP2) deviation alarm set
too low. Raise SP2 to 30 °F (17 °C)
default setting.
Hose temperature display overshoots
setpoint and/or green switch light
goes out Hose coiled up on itself too much,
sends overheated fluid to FTS Straighten out coiled hose
Insulation peeled off of hose at FTS
sensor inside hose causes the rest of
hose to overheat. Insulate hose up to FTS. FTS must
represent bulk of heated hose.
Hose heat too low Temperature setpoint too low Check setpoint (SP1); adjust if nec-
essary
Fluid flow too high Use smaller mix chamber. Decrease
pressure.
Hose heat not turned on long
enough. More than 310 ft. connected. Allow more time for hose heat to heat
up or preheat supply drums
Loose electrical connectors. Green
light on Power Controller is off. Check power and FTS connections;
see page 20.
Either heat temperature controller
display dark Controller connector loose Check and reconnect
No lights on hose power controller in
lower cabinet while temperature con-
troller 01 output light is on steady.
Green switch light is on. Not heat in
hose. No 4.5 to 12 Vdc signal from temper-
ature controller Make sure 01 light on top tempera-
ture controller is on.
Polarity is reversed on 4.5 to 12 Vdc Reverse blue wires.
No power to hose power controller
terminals 2 and 3; 220-240 Vac Make sure green light on hose switch
is on. Make sure hose primary circuit
breaker is on.