Troubleshooting - Graco PR-X Setup - Operation - Repair

Troubleshooting

Problem
Display module completely
dark
No or incorrect amount of
material dispensed from
either side
Significant material leaking
from pump seal
Material weight incorrectly
dispensed
3A7526B
Cause
No power
Thrown breaker
Loose connection
Bad display module
MD2 Dispense Valve (AE) closed
Needle or Static Mixer Package
(AH) clogged
Supply pump ball valve closed (if
installed)
Cartridge or pail empty
Supply pump clogged
Air in PR-X machine
Pump shaft and/or shaft seal worn
Needle or Static Mixer Package
(AH) clogged
MD2 Dispense Valve (AE) or fluid
lines clogged
MD2 Dispense Valve (AE) opened
or closed incorrectly
Input air reduced or removed
Inlet Valve (AL or AM) not closed (if
installed)
Inlet 1K Ultra-Lite valve leaking (if
installed)
Piston worn out or broken
1. Follow Pressure Relief Procedure on page 46,
before checking or repairing the system.
2. Disconnect AC power from the system.
Verify AC power switch (BM) is ON
Check machine breakers and reset
Tighten screen data cable
Replace display module
Verify supply air pressure
Replace needle or Static Mixer Package
(AH)
Open ball valve
Exchange cartridge or pail
Clean supply pump
Purge and prime the system
Remove pump shaft assembly and reinstall
pump rebuild kit
Replace needle or Static Mixer Package
(AH). Incorporate purge timer or decrease
purge timer delay to prevent Static Mixer
Package (AH) blockage
Clean MD2 Dispense Valve (AE) or fluid
lines
1. Verify MD2 Dispense Valve's (AE) inlet
air pressure.
2. Inspect MD2 Dispense Valve (AE) air
cylinder and adapters for leaks.
Reconnect input air line to system. Increase
air pressure regulator adjustment
1. Inspect the Inlet Valve (AL or AM) for
wear and tear.
2. Verify rotary cylinder inlet pressure.
Inspect needle and seal components
Replace piston
Troubleshooting
Solution
53