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ESAB
LAF 1251M
ESAB LAF 1251M User manual
Type
User manual
Brand
ESAB
Size
10.03 MB
Category
Welding System
Pages
58
Language
English
Table of contents
Table of contents
2
READ THIS FIRST
4
INTRODUCTION
5
TECHNICAL DATA
6
WIRING DIAGRAM
11
Component description
11
LAF 631 – Valid for serial no. 935-xxx-xxxx
12
LAF 631 – Valid for serial no. 126-xxx-xxxx up to and including 126-341-xxxx
14
LAF 631 – Valid from serial no. 126-342-xxxx
16
LAF 1001, LAF 1001M – Valid for serial no. 935-xxx-xxxx
18
LAF 1001, LAF 1001M – Valid for serial no. 126-xxx-xxxx up to and including 126-341-xxxx
20
LAF 1001, LAF 1001M – Valid from serial no. 126-342-xxxx
22
LAF 1251, LAF 1251M, LAF 1601, LAF 1601M – Valid for serial no. 935-xxx-xxxx
24
LAF 1251, LAF 1251M, LAF 1601, LAF 1601M – Valid for serial no. 126-xxx-xxxx up to and including 126-341-xxxx
26
LAF 1251, LAF 1251M, LAF 1601, LAF 1601M – Valid from serial no. 126-342-xxxx
28
DESCRIPTION OF OPERATION
30
2AP3 Interference suppressor board
30
2AP3 Component positions
31
Power sources LAF 1001, LAF 1001M, LAF 1251, LAF 1251M, LAF 1601 and LAF 1601M
31
Power source LAF 631 (from serial no. 744-xxx-xxxx)
31
20AP1 Control board
31
20AP1:1 Power supply
32
Voltage monitoring
32
DC supplies, +24V
33
DC supplies, +24V_A
34
DC supplies, +12V_CAN
34
20AP1:2 Thermal protection
35
20AP1:3 Shunt input
35
20AP1:4 Synchronizing
36
20AP1:5 Arc voltage
36
20AP1:6 Gate pulses
37
20AP1:7 CAN bus
38
CAN power supply
39
20AP1:8 Start / Stop / Weld on
39
20AP1:9 Analogue control
40
20AP1:10 Optional I/O
40
Digital inputs
40
Digital outputs
41
Analogue outputs
41
20AP1:11 Processor and miscellaneous circuits
41
20AP1 Component positions
43
FAULT CODES
44
Fault log
44
Fault code description
44
SERVICE INSTRUCTIONS
47
What is ESD?
47
Service aid
47
Special tools
48
Maintenance
48
Checking diodes and thyristors
48
Load characteristics
50
IN-SERVICE INSPECTION AND TESTING
51
Overview
51
General requirements
51
Periodic inspection and test
51
After repair, inspection and test
51
Visual inspection
51
Electrical test
52
Functional test
54
Test report
55
SPARE PARTS
56
REVISION LOG
57
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