Troubleshooting - Graco QUANTM QTC Series Instructions Manual

Troubleshooting

Troubleshooting
Problem
LED light flashing
Equipment cycles, but
does not prime or pump
Equipment does not hold
fluid pressure at stall
Equipment leaking fluid
externally from joints
Equipment stalled, will
not cycle
Reduced performance
30
Cause
Equipment error; special-case cause.
Equipment running too fast, causing
cavitation before prime.
Check is worn or wedged in the seat or
manifold.
Worn seat.
Restricted outlet or inlet port.
Loose inlet fittings or manifolds.
Damaged manifold seats.
Worn check, seats, or seals.
Loose manifold connections or fluid
connections.
Loose diaphragm shaft fastener.
Loose manifold connections or fluid cover
connections.
Worn manifold seats or seals.
Fluid line clogged or valves closed.
Motor or controller wired improperly.
Leak sensor tripped.
Fluid line clogged.
Checks are sticky or leaking.
Diaphragm (or backup diaphragm, if
applicable) ruptured.
1. Follow the Pressure Relief Procedure, page 21,
before checking or repairing the equipment.
2. Check all possible problems and causes before
disassembling equipment.
Solution
See Troubleshoot LED Indicator
Event Errors, page 25.
Slow down the motor controller.
Replace check and seat.
Replace check and seat.
Remove restriction.
Tighten.
Replace.
Replace.
Tighten.
Tighten.
Tighten.
Replace.
Inspect; clear.
Open valves downstream of the
equipment.
Wire per instructions in your related
motor manual. See Related Manuals,
page 2.
Check diaphragm for rupture or
incorrect installation. Repair or replace.
Inspect; clear.
Clean or replace.
Replace.
3A8947A