Test Procedures; Static Test Procedures - Danfoss VLT Series Service Manual

5.0 TEST PROCEDURES

5.1 STATIC TEST PROCEDURES

All tests should be made with a meter capable of testing diodes.
Use a digital volt/ohm meter (VOM) set on the diode scale or
an analog ohmmeter set on Rx100 scale. Before making any
checks disconnect all input, motor and brake resistor
connections.
Figure 5-1. Interface PCA and Power Card PCA Connector
Identification is provided as a reference for finding the
appropriate connectors described in the test procedures in
this section. Some connectors are optional and not on all drive
configurations.
MK105
MK101
MK103
Interface Card
FK100
MK110
FK100
5-2
VLT is a registered Danfoss trademark
MK100 MK104
Current scaling card
FK101
FK102
MK109
Figure 5-1. Interface PCA and Power PCA Connector Identification
For best troubleshooting results, it is
recommended that static test procedures
described in this section be performed in the
order presented.
Diode Drop. A diode drop reading will vary depending on the
model of ohmmeter. Whatever the ohmmeter displays as a
typical forward bias diode is defined as a "diode drop" in these
procedures. With a typical DVM, the voltage drop across most
components will be around .300 to .500. The opposite reading
is referred to as infinity and most DMVs will display the value
OL for overload.
MK102
MK102
MK111
MK100
MK106
FK103
Power Card
NOTE
MK104
MK105(A) +DC
MK105(B) -DC
MK400
MK107