Graco 25R128, Setup - Operation - Repair

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