Graco Reactor A-20 Repair Parts page 10

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