Graco Reactor A-25 Repair Parts page 21

Hose Heat System
PROBLEM
Hose heats but heats slower than
usual or it does not reach tempera-
ture.
Hose does not maintain temperature
while spraying.
Hose temperature exceeds setpoint.
3A1570L
CAUSE
Ambient temperature is too cold.
FTS failed or not installed correctly.
Low supply voltage.
A and B setpoints too low.
Ambient temperature is too cold.
Flow too high.
Hose was not fully preheated.
Low supply voltage.
A and/or B heaters are overheating
material.
Faulty thermocouple connections.
Missing/damaged insulation around
FTS, causing the hose heat to be ON
constantly.
Troubleshooting
SOLUTION
Use auxiliary hose heat system.
Check FTS, page 12.
Verify line voltage. Low line voltage
significantly reduces power available
to hose heat system, affecting longer
hose lengths.
Increase A and B setpoints. Hose is
designed to maintain temperature,
not to increase it.
Increase A and B setpoints to
increase fluid temperature and keep
it steady.
Use smaller mix chamber. Decrease
pressure.
Wait for hose to heat to correct tem-
perature before spraying.
Verify line voltage. Low line voltage
significantly reduces power available
to hose heat system, affecting longer
hose lengths.
Check primary heaters for either a
thermocouple problem or a failed ele-
ment attached to thermocouple, page
12.
Verify that all FTS connections are
snug and that pins of connectors are
clean. Examine connection of ther-
mocouples 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 con-
trol board.
Make sure bundle has adequate
insulation evenly covering the entire
length and connection joints.
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