7-6 Trips and Fault Finding
590 Series DC Digital Converter
Fault Finding
Problem Possible Cause Remedy
Converter will not power-up Fuse blown Check supply details, replace
with correct fuse.
Check Product Code against
Model No.
Faulty cabling Check all connections are
correct and secure.
Check cable continuity
Converter fuse keeps blowing Faulty cabling or connections
wrong
Check for problem and rectify
before replacing with correct
fuse
Faulty Converter Contact Parker SSD Drives
Cannot obtain HEALTH state Incorrect or no supply
available
Check supply details
Motor will not run at switch on Motor jammed Stop the Converter and clear
the jam
Motor runs and stops Motor becomes jammed Stop the Converter and clear
the jam
Motor runs at full speed only Reversed tachogenerator or
open circuit tachogenerator
Check tachogenerator
connections
Open circuit speed reference
potentiometer
Check terminal
Table 7-2 Fault Finding
Test Points
The following test points are located on the control board and, used with a meter, will provide
valuable information in the event of a fault. Refer to Parker SSD Drives for further information.
P3 port
P2 port
TP1
TP4
0V
TP2
TP5
TP7
TP3
TP6
TP8
Test Point Description
TP1
Armature current ± 2.2V ≡ ±200%, (value of CURRENT FEEDBACK diagnostic,
Tag No. 298)
TP2
Buffered analog tach ±10V ≡ ±100%, (value of SPEED FEEDBACK diagnostic,
Tag No. 207)
TP3
Armature volts ±10V ≡ ±100%, (value of TERMINAL VOLTS diagnostic, Tag No. 57)
TP4
Field current 4V ≡ 100%, (value of FIELD I FBK diagnostic, Tag No. 300)
TP5 Not used
TP6 Overcurrent trip 12V to -15V transition on trip
TP7 PEEK software (Parker SSD Drives use)
TP8 Not used
0V 0V
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