Primary Heaters (A And B) - Graco Reactor H-25 Series Repair And Parts Manual

Primary Heaters (A and B)

Before performing any troubleshooting procedures:
1. Relieve the pressure. See Pressure Relief
Procedure, page 26.
PROBLEM
Primary heater(s) does not heat.
Control of primary heat is abnormal;
high temperature overshoots or E01
error occurs intermittently.
312063Z
2. Turn main power OFF
3. Allow equipment to cool.
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
Heat turned off.
Temperature control alarm.
Signal failure from thermocouple.
Dirty thermocouple connections.
Thermocouple not contacting heater
element.
Failed heater element.
Signal failure from thermocouple.
Thermocouple wired incorrectly.
Troubleshooting
.
SOLUTION
A
B
Press or zone
keys.
Check temperature display for
diagnostic code, page 8.
See E04: Fluid Temperature
Sensor (FTS) or thermocouple
disconnected, page 10.
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.
Loosen ferrule nut (N), push in
thermocouple (310) so tip (T)
contacts heater element (307).
Holding themocouple tip (T) against
heater element, tighten ferrule nut
(N) 1/4 turn past tight. See
Thermocouple, page 36 for
illustration.
See Primary Heaters, page 36.
See E04: Fluid Temperature
Sensor (FTS) or thermocouple
disconnected, page 10.
See E04: Fluid Temperature
Sensor (FTS) or thermocouple
disconnected, page 10. Power up
zones one at a time and verify that
temperature for each zone rises.
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