Graco VRM Instructions Manual page 64

Appendix D - ADM Event and Error Codes Overview
Error
Code Error Name Error Description
The volume of oil in the tank is
below the minimum level
MBH1 Low Oil Level
needed for the system to
properly operate
The motor magnetism has
Low Motor
MBN1 decreased to the point where
Performance
performance is greatly reduced
The MCM attempted to move
Pump Failed
N4A1 the pump but no movement
to Move
was detected
Pressure has risen to an
Thermal unsafe level due to thermal
P400 Pressure expansion of materials. All
Rise conditioning zones have
automatically been turned off.
Red Pressure
P4A1
Shutdown
The material pump pressure
exceeded the maximum
Blue
operating pressure as defined
P4B2 Pressure
in the setup screens
Shutdown
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Error
Type Cause
Low oil level
Loose/bad connection
Bad level sensor
Alarm
Leak in hydraulic driver
Leak in the hydraulic
reservoir, heat
exchanger
Prolonged exposure to
Advisory
heat or high voltage
Motor failure
Hydraulic power pack
failure
Loose/bad connection to
the linear position sensor
Failure of the linear
position sensor
Deviation
Motor no longer coupled
to hydraulic pump
Supply tube from
hydraulic pump to
manifold is loose or
broken
Broken motor shaft
Over-pressure valve
dumping to tank
Deviation High pressure
Dispense valve failed to
Alarm
open
Bad dispense valve
Restriction in the
material lines
Invalid maximum
pressure defined
Alarm
Orifices blocked
Hose blocked
Dispense valve failed to
open
Solution
Check oil level and if low add more hydraulic fluid
Check to ensure the hydraulic oil level sensor is
properly connected to the MCM and that the wire has
not been damaged
Replace sensor
Inspect hydraulic driver end seals and early leak
detection tubing. Replace seals as necessary and
replace lost oil.
Inspect the hydraulic reservoir fittings and filter for
leaks. Repair or replace as necessary and replace
lost oil.
If error persists and performance can no longer
satisfy the user requirements the motor will need to
be replaced
Visually check to ensure the pump is moving, if not
ensure the motor is wired properly
If motor is moving but pump is not and pressure is not
building they hydraulic power pack may need
servicing
Check to ensure the linear position sensor is properly
connected to the MCM and the wiring has not be
damaged
Replace the linear position sensor
Reset coupler per specifications and retighten set
screws
Retighten or replace supply tube
Replace motor
Verify that no outside forces are stopping the pump
from moving, then inspect over-pressure valve for
damage or debris
Open the dispense valve manually or open the valves
to bleed pressure
Check to make sure the dispense valve is properly
configured and connected to the MCM
Replace dispense valve
Check to ensure there is no blockage
Make sure the requested pressure is within the max
operating pressure, which can be found on the setup
screen System 1
Clear blockage
Clear blockage or replace hose as necessary
Check to make sure the dispense valve is properly
configured and connected to the MCM
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