Troubleshooting; Light Tower (Optional) - Graco HFR Setup

Troubleshooting

Before performing any troubleshooting procedure:
1. Perform Pressure Relief Procedure on page 43.
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 con-
trols are properly set and wiring is correct before
assuming there is a problem.
PROBLEM
General
Display Module completely
dark
No or incorrect amount of
material dispensed from
either side
Significant material leaking
from pump seal
Material dispensed not cor-
rect weight
A (Red) and B (Blue) Primary Heaters
Control of primary heat is
abnormal; high temperature
overshoots
Hose System
Material heats but heats
slower than usual or it does
not reach temperature
3A2797ZAA
CAUSE
No Power
Thrown Breaker
Loose Connection
Bad Display Module
Ball Valve closed (if Installed)
Tank Empty
Tank Clogged
Air In Material
Pump shaft worn and/or shaft seal
worn
Specific gravity of one or more of the
two materials has changed since cali-
bration
Check valve malfunction
Piston worn or broken
Dirty RTD connection
RTD not contacting heater element
Failed heater element
Signal failure from RTD
RTD wired incorrectly
Ambient temperature is too cold
FTS failed or not installed correctly

Light Tower (Optional)

Signal Description
Green on only System is powered up and there are
no error conditions present
Yellow on An advisory exists
Red flashing A deviation exists
Red on The system is shut down due to an
alarm occurring.
Errors include advisories, deviations, or alarms, so
green will only be on when none of these occur. A yel-
low light can be on at the same time as red (flashing or
solid on) when an advisory exists at the same time as a
deviation or alarm.
SOLUTION
Verify AC Power switch is ON
Check Machines Breakers and Reset
Tighten 5-pin cable on Advanced Display Module
Replace Advanced Display Module
Open tank ball valve.
Add fluid
Clean tank
Prime the machine
Remove pump shaft assembly and reinstall read
pump rebuild kit
Run calibration
Remove check valve; clean or replace as necessary
Replace Piston
Unplug and re-plug RTD wires.
Loosen ferrule nut, push in RTD so tip contact heater
element. Holding RTD tip against heater element,
tighten ferrule nut 1/4 turn past tight.
Replace
Check connections
Check connections. Power up zones one at a time
and verify that temperature for each zone rises.
Use auxiliary hose system.
Check FTS
Troubleshooting
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