Troubleshooting - Graco XM Series Repair Parts

Troubleshooting

Troubleshooting
To avoid injury due to unexpected machine operation
initiated by a remote controller, disconnect the
customer I/O cable from the system prior to
troubleshooting.
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
pressurized fluid, such as skin injection, splashing
fluid and moving parts, follow the Pressure Relief
Procedure on page 17 when you stop pumping and
before cleaning, checking or servicing the equipment.
Problem
Display not lit on system with
alternator power supply.
No electric power.
Display not lit on system with
alternator power. Green light is
present on FCM (218) and USB (219),
but no green light is present on back
of display module (204).
26
Cause
Air valve not turned on.
Air supply pressure too low.
Air supply filters plugged. Inlet
manifold filter (604) or air regulator
(344) filter plugged.
Turbine air regulator (277) set too low. Adjust to 18 +/- 1 psi (12.6 +/- 10 kPa, 1.26 +/-
Alternator turbine failure.
Power supply not connected to main
board.
Display board failure.
Faulty CAN cable (268). Or CAN cable
is disconnected.
Faulty display module.
NOTE: The sprayer operates using air pressure. Many
problems are caused by inadequate air supply. The inlet
air pressure gauge cannot drop below 50 psi (0.35 MPa,
3.5 bar) while running.
NOTE: If an error code displays, see manual XM
sprayer operation manual.
1. Follow Pressure Relief Procedure, page 17,
before checking or repairing the gun.
2. Check all possible problems and causes before
disassembling gun.
Turn on main air valve to system.
Increase pressure to 30 psi (0.21 MPa, 2.1 bar)
or greater.
Clean filter bowls; replace filter elements. Page
29.
0.07 bar).
Repair or replace turbine. Page 36.
Check power connections to main board. See
Detailed Electrical Schematic, XM Sprayer
with Wall Power (page 1), starting on page 51.
Replace display board. Page 34.
Check cable and replace. See Alternator
Assembly, page 84.
Replace display module. See User Interface/
Control Box, page 30.
Solution
313289W