Alarms List - Graco Aerobotix RC50 Instructions Manual

Alarms List

Pouring Alarms
If a pouring alarm has been triggered, and the cause is
unknown, "dry cycling" the machine may be helpful in
finding the cause. See the MixHead On/Off section on
page 48 for more information.
Any alarm that will stop the MixHead Hydraulic Unit
operation will stop a pour.
Iso/Poly Failed To Build Pour Pressure Alarm
• This alarm occurs during pressure build. A timer in
the PLC controller will stop the pour sequence if the
metering pump fails to develop minimum pouring
pressure within a set time. Typically 15 seconds lon-
ger than the pressure build time is allowed before
this alarm will occur.
Iso/Poly Low Pour Pressure Alarm
• If the chemical pressure during a pour drops below
the setting for the Low Pour Pressure Switch will be
tripped and will stop the pour. Improper orifice
adjustment is a possible cause.
Iso/Poly High-Pressure Alarm
• The High-Pressure alarm can occur any time the
pressure at the pump discharge rises above the set-
ting on the high-pressure switch at the pump dis-
charge. This alarm stops both the Iso and Poly
pumps and stops any pour in progress. This may be
caused by improper orifice adjustment.
Ratio Out Of Tolerance Warning/Shutdown
• When the dispensing ratio is outside of the toler-
ance specified on the Flow Control Screen this
alarm will be displayed.
Flow Rate Out Of Tolerance Warning/Shutdown
• When the total flow rate is outside of the tolerance
specified on the Flow Control Screen this alarm
will be displayed.
Iso, Poly Metering System Alarms
Iso, Poly Pump Motor Overload Alarm
• This alarm causes an immediate stop of the meter-
ing pump motor. If the motor overload alarm has
occurred, the overload button on the starter must be
reset before the motor can be started.
313813A
Iso, Poly Metering Pump Inlet Low-Pressure Alarm
• This alarm is generated any time the inlet pressure
at the metering pump drops below the setting of the
inlet low-pressure switch. This alarm stops the
affected metering pump motor.
Possible causes for this alarm:
• Metering pump inlet filter may be clogged and need
to be serviced
• Day tank pressure is too low
• Pump inlet valve is closed and need to be opened to
allow fluid flow from tank
Iso, Poly Metering Pump High-Pressure Alarm
• This alarm is generated any time the pressure at the
metering pump rises above the set point on the
high-pressure switch, located at the metering pump
discharge. Both the Iso and the Poly pump motors
stop when one of them triggers the high pressure
switch.
Tanks Alarms
Iso/Poly Tank Low Level Alarm
• This alarm will occur when the tank level reaches
10%. This alarm affects the running of the pump fed
by the tank and affects pouring depending on
whether the Low Level Bypass is turned on or off.
Iso/Poly Tank Auto-Fill Failed to Fill
• This alarm is triggered when the Auto-Fill fails to fill
within the time specified on the Tank Control page.
This alarm protects from overfilling the tanks in the
event one of the top fluid level sensors fail.
Iso/Poly Tank Agitator Motor Overload
• This alarm is triggered when the agitator motor
overloads.
Troubleshooting
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