Graco Reactor H-25 Series Repair And Parts Manual page 19

PROBLEM
Hose temperature exceeds setpoint.
Erratic hose temperature.
Hose does not heat.
Hoses near Reactor are warm, but
hoses downstream are cold.
312063Z
CAUSE
A and/or B heaters are overheating
material.
Faulty thermocouple connections.
Missing or damaged insulation around
FTS, causing the hose heat to be ON
constantly.
Faulty thermocouple connections.
FTS not installed correctly.
Missing or damaged insulation around
FTS, causing the hose heat to be ON
constantly.
FTS failed or is not contacting
correctly.
FTS not installed correctly.
Temperature control alarm.
Shorted connection or failed hose
heating element.
Troubleshooting
SOLUTION
Check primary heaters for either a
thermocouple problem or a failed
element attached to thermocouple,
E04: Fluid Temperature Sensor
(FTS) or thermocouple
disconnected, page 10.
Verify that all FTS connections are
snug and that pins of connectors are
clean. Examine connection of
thermocouples to long green plug on
heater control board. Unplug and
re-plug thermocouple wires, cleaning
off any debris. Unplug and re-plug long
green connector on heater control
board.
Make sure the hose bundle has
adequate insulation evenly covering
the entire length and connection joints.
Verify that all FTS connections are
snug and that pins of connectors are
clean. Examine connection of
thermocouples to long green plug on
heater control board. Unplug and
re-plug thermocouple wires, cleaning
off any debris. Unplug and re-plug long
green connector.
FTS should be installed close to end of
hose in same environment as gun.
Verify FTS installation, Fluid
Temperature Sensor (FTS), page 39.
Make sure the hose bundle has
adequate insulation evenly covering
the entire length and connection joints.
Check FTS, Fluid Temperature
Sensor (FTS), page 39.
FTS should be installed close to end of
hose in same environment as gun.
Verify FTS installation, page 39.
Check temperature display or
diagnostic code, Fluid Temperature
Sensor (FTS), page 39.
With hose heat on and temperature
setpoint above displayed hose zone
temperature, verify voltage between
connectors at each section of hose.
Voltage should drop incrementally for
each section of hose further from
Reactor. Use safety precautions when
hose heat is turned on.
19