Troubleshooting; Reactor Electronics - Graco Reactor H-25 Series Repair And Parts Manual

Troubleshooting

Reactor Electronics

Before performing any troubleshooting procedures:
1. Relieve the pressure. See Pressure Relief
Procedure, page 26.
PROBLEM
Both sides of display do not
illuminate.
Temperature display does not
illuminate.
Pressure display does not
illuminate.
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
No power.
Low voltage.
Loose wire.
Display disconnected.
Display disconnected.
Display cable damaged or corroded. Clean connections; replace cable if is
Defective circuit board.
Display disconnected.
Display cable damaged or corroded. Clean connections; replace cable if is
Defective circuit board.
.
SOLUTION
Plug in power cord.
Turn disconnect ON
Ensure input voltage is within
specifications, Display Module,
page 41.
Check connections, Display
Module, page 41.
Check cable connections, Display
Module, page 41.
Check cable connections, Display
Module, page 41.
damaged.
Swap display connection to motor
control board with connection to
heater control board. If temperature
display illuminates, heater control
board is causing problem. Otherwise,
display cable or display is failing.
Check cable connections, Display
Module, page 41.
damaged.
Swap display connection to motor
control board with connection to
heater control board. If pressure
display illuminates, motor control
board is causing problem. Otherwise,
display cable or display is failing.
Troubleshooting
.
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