Danfoss Turbocor VTT Series - ESD Protection;Grounding; Figure 5 - ESD Label; Testing Voltages of the Power Electronics; VTT;VFD Fasteners

16 of 165 M-SV-VT-001-EN Rev. A
Introduction
control procedures at all times when handling sensitive electronic components.
This section outlines static control precautions that must be followed when providing service support
in the eld. Service support personnel should create a safe, static-free environment.
Service personnel must use a commercially available service kit for handling static-sensitive devices.
The kit typically includes:
• Ground cord assembly
• Alligator clip
• Grounding wrist strap
• Wrist strap tester
If a safe, static control environment cannot be created for a specic reason, the operator will ensure
that electrostatic discharge (ESD) items and personnel are at the same electrical potential as the
equipment.
The electronic modules should only be removed from the ESD protective bag at the last moment, just
before installation when the operator is ready to do the replacement.
The operator should avoid touching any components or connectors on the module and should hold
the module by its edge or enclosure, as applicable.
1.8.1 ESD Protection/
Grounding
All parts that are susceptible to damage by ESD will be marked using the following label. See Figure
5 (ESD Label). Please follow the instructions below to ensure safety and to protect the parts from ESD
damage.
Figure 5 - ESD Label
1.9 Testing Voltages of
the Power Electronics
When testing the voltages of the Compressor’s power electronics without mains supply available, a
24 VDC power supply must be used. It is essential that the power supply not be left connected to
the Compressor during normal operation. When checks are complete, disconnect and remove the
power supply.
1.10 VTT/VFD Fasteners All factory installed fasteners are metric.