Common Faults; Maintenance Schedule - ESAB A120 Operating Manual

CUTMASTER A120
5.02

Maintenance Schedule

NOTE!
The actual frequency of maintenance
may need to be adjusted according to
the operating environment.
Daily Operational Checks or Every Six Cutting
Hours:
1. Check torch consumable parts, replace if dam-
aged or worn.
2. Check plasma and secondary supply and pres-
sure/flow.
3. Purge plasma gas line to remove any moisture
build-up.
Weekly or Every 30 Cutting Hours:
1. Check fan for proper operation and adequate air
flow.
2. Inspect torch for any cracks or exposed wires,
replace if necessary.
3. Inspect input power cable for damage or exposed
wires, replace if necessary.
Six Months or Every 720 Cutting Hours:
1. Check the in-line air filter(s), clean or replace as
required.
2. Check cables and hoses for leaks or cracks,
replace if necessary.
3. Check all contactor points for severe arcing or
pits, replace if necessary.
4. Vacuum dust and dirt out of the entire machine.
CAUTION
!
Do not blow air into the power supply
during cleaning. Blowing air into the unit
can cause metal particles to interfere
with sensitive electrical components and
cause damage to the unit.
5-2
5.03

Common Faults

Problem -
Symptom
Insufficient
Penetration
Main Arc
Extinguishes
Excessive Dross
Formation
Short Torch
Parts Life
Difficult Starting 1. Worn torch parts.
SERVICE
Common Cause
1. Cutting speed too fast.
2. Torch tilted too much.
3. Metal too thick.
4. Worn torch parts
5. Cutting current too low.
6. Non - Genuine ESAB parts used
7. Incorrect gas pressure
1. Cutting speed too slow.
2. Torch standoff too high from
workpiece.
3. Cutting current too high.
4. Work cable disconnected.
5. Worn torch parts.
6. Non - Genuine ESAB parts used
1. Cutting speed too slow.
2. Torch standoff too high from
workpiece.
3. Worn torch parts.
4. Improper cutting current.
5. Non - Genuine ESAB parts used
6. Incorrect gas pressure
1. Oil or moisture in air source.
2. Exceeding system capability
(material too thick).
3. Excessive pilot arc time
4. Gas pressure too low.
5. Improperly assembled torch.
6. Non - Genuine ESAB parts used
2. Non - Genuine ESAB parts
used.
3. Incorrect gas pressure.
0-5430