1.1.4 Chapters included
Table 3
Chapter Description
1. Introduction Introduces the reader to this manual.
2. Description Describes the maintenance in general.
3. Service
PSTX720...840
This chapter describes how to perform service on the
Softstarter step-by-step.
The chapter contains:
• Earth the Softstarter
• How to access service parameters
• Update rmware
• Set the ID
• Reset to factory defaults
• Remove the HMI
• Place new HMI
• Disconnect main power cables and control
cables
• Connect main power cables and control
cables
• Change the PCBA
• Change the fans
• Change the bar holders
• Change the current transformers
• Change the bypass contactor
• Change the SCR
• Test the SCR
• Change the stays
4. Revision Shows revisions of this manual
1.1 Service manual
This manual contains step-by-step instructions on
how to perform service and maintenance on Softstarter
range PSTX720...840. Service and maintenance shall be
performed in accordance with this instruction to ensure
product functionality, and to prevent that the lifetime of the
product is shortened.
1.1.1 Intended audience
General
The service manual is intended for internal use and for
the maintenance personnel responsible for service within
ABB.
Reprint
Reprinting of this service manual is only promoted on
approval. Reprint for internal use is permitted only for ABB
service engineers.
1.1.2 Revision notes and related
documents
For latest information on revisions and other documents
related to the Softstarters, please check www.abb.com/
lowvoltage.
Table 1
Document Document name
Spare parts catalogue 1SFC001013C0201
1.1.3 Acronyms and abbreviations
Acronyms and abbreviations used in this manual.
Table 2
Acronym/
Abbreviation
Description
PCBA Printed circuit board assembly
ESD Electrostatic sensitive device
LED Light Emitting Diode
LCD Liquid Crystal Display
SCR Silicon Controlled Rectifier (Thyristor)
HMI Human-Machine Interface
FBP Fieldbusplug
PCBA Printed Circuit Board Assembly
CT Current Transformer
R\L-key Remote or Local
i-key Information key