Graco LSR Select, Instructions Manual

Page: 27 / 112

Troubleshooting
3A2152B 27
Inh/Cat pump load/dis-
pense sensor not work-
ing
Bad connection Visually check connection Reconnect sensor
Bad sensor Check PLC input/sensor voltage Replace bad sensor
Inh/Cat Pump not home
Drive fault Fault on HMI screen Clear fault, re home
System powered up
with pump not home
Fault on HMI screen Home pump motor
Inh/Cat pump load/dis-
pense valves didn't shift
No air on solenoid
valves
Check air pressure to valves
Put minimum 80psi air pres-
sure on solenoid valves
Bad electric connection Pilot light on solenoid valves
Reconnect cable to sole-
noid valve
Mixer plugged Mixed material cured Very high pressure
Tear down and clean out
mixer/stack assembly
Customer supplied
screw valve not opening
Air lines to valve back-
wards
Very high pressure
Check air connections,
swap if necessary
Valve cured up Very high pressure
Tear down and clean out
screw valve
General- Mixed material won't cure
Catalyst not being
added
Catalyst percentage
not set to 1%
Verify HMI Set to 1%
Broken lead screw nut Motor turns but no linear movement Replace lead screw nut
Catalyst added is no
good Contaminated with
moisture from air
Catalyst is yellow, not clear Replace catalyst
General- Mixed material cures too fast or cures even when base purging
Catalyst still being
added
Catalyst percentage
still set at 1%
Verify HMI Set to zero percent
Bad seal on catalyst
non drip valve Pull catalyst valve out of stack and
inspect Replace non drip valve
seat.
Inhibitor not being added
Inhibitor percentage
set to zero or not high
enough
Verify HMI
Increase inhibitor percent-
age
Broken lead screw nut Motor turns but no linear movement Replace lead screw nut
Problem Cause Diagnostic Solution