PVE warnings
W
Warning
Not applying to the Operational Conditions can compromise safety.
All brands and all types of directional control valves – including proportional valves – can fail and cause
serious damage. It is therefore important to analyze all aspects of the application. Because the
proportional valves are used in many different operation conditions and applications, the machine
builder/ system integrator alone is responsible for making the final selection of the products – and
assuring that all performance, safety and Warning requirements of the application are met.
A PVG with PVE can only perform according to description if conditions in this Technical Information are
met.
In particularly exposed applications, protection in the form of a shield is recommended.
When the PVE is in fault mode the quality of performance and validity of feedback is limited depending
on the fault type.
Error pins from more PVEs may not be connected. Inactive error pins are connected to ground and will
disable any active signal. Error pins are signal pins and can only supply very limited power consumption.
Deviation from recommended torque when mounting parts can harm performance and module.
Adjustment of the position transducer (LVDT) will influence calibration, and thereby also safety and
performance.
When replacing the PVE, the electrical and the hydraulic systems must be turned off and the oil pressure
released.
PVEA is not for use on PVG 100.
Hydraulic oil can cause both environmental damage and personal injury.
Module replacement can introduce contamination and errors to the system. It is important to keep the
work area clean and components should be handled with care.
After replacement of modules or cables wiring quality must be verified by a performance test.
By actuation at voltage below nominal PVG will have reduced performance.
The PVE is not designed for use with voltage outside nominal.
Obstacles for the Pilot oil can have direct influence on spool control.
Reduced pilot oil pressure will limit spool control.
Too high pilot oil pressure can harm the PVE.
Service Manual
PVE Series 7
Warnings
6 |
©
Danfoss | August 2017
AX00000348en-US | 0101
