Hose Heat System - Graco Reactor H-25 Series Repair And Parts Manual

Troubleshooting

Hose Heat System

Before performing any troubleshooting procedures:
1. Relieve the pressure. See Pressure Relief
Procedure, page 26.
PROBLEM
Hose heats but heats slower than usual
or it does not reach temperature.
Hose does not maintain temperature
while spraying.
18
2. Turn main power OFF
3. Allow equipment to cool.
Problems
Try the recommended solutions in the order given for
each problem, to avoid unnecessary repairs. Also,
determine that all circuit breakers, switches, and
controls are properly set and wiring is correct before
assuming there is a problem.
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.
.
SOLUTION
Use auxiliary hose heat system.
Check FTS, E04: Fluid Temperature
Sensor (FTS) or thermocouple
disconnected, page 10.
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
temperature before spraying.
Verify line voltage. Low line voltage
significantly reduces power available to
hose heat system, affecting longer
hose lengths.
312063Z