Eurotherm 590+ Series, Product Manual, Page: 186 / 308

7-2
Trips and Fault Finding
590+ Series DC Digital Converter
Fault Finding
Problem
Problem Problem
Problem Possible Cause
Possible Cause Possible Cause
Possible Cause Remedy
Remedy Remedy
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 Eurotherm 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 7-1 Fault Finding
Alarm Messages
When a trip occurs an alarm message is displayed on the MMI, and
information about the trip is stored in the ALARM STATUS menu.
The alarm message and the LAST ALARM parameter are displayed in
the selected language of the MMI.
The HEALTH STORE and HEALTH WORD parameters display information as hexadecimal
values, or the sum of the hexadecimal values when more than one alarm is active. Thus the
unique value can represent one or more alarms.
Note: Hexadecimal refers to the common practice of counting to the base of 16 in computing
rather than the base of 10. The sixteen `numbers’ used being 0 to 9, A to F. Thus an 8
bit byte is represented by two characters in the range 00 to FF, while a 16 bit word is
represented by four characters in the range 0000 to FFFF.
LAST ALARM
(Tag 528). This display shows the last alarm message to have been displayed. To reset the
parameter simply press the
▼ ▼ ▼ ▼
(DOWN) key to clear the alarm. Alternatively, you can switch the
auxiliary supply off and on, causing NO ACTIVE ALARMS to be displayed.
HEALTH WORD
(Tag 115).This parameter is used to continuously monitor the status of the Converter. As alarms
are added or removed, the display will immediately update to show the hexadecimal sum of these
alarms.
The value reverts to 0x0000 when the Start (C3) input is raised (+24V), and when no trip
condition is present.
HEALTH STORE
(Tag 116).This displays the hexadecimal value of the first (or only) alarm to occur causing the
trip condition.
The display reverts to 0x0000 when the Start (C3) input is raised (+24V).
MMI Menu Map
1
ALARM STATUS
LAST ALARM
HEALTH WORD
HEALTH STORE