8 TROUBLESHOOTING
0463 605 001
- 49 -
© ESAB AB 2018
Type of fault
Corrective action
TIG (GTAW) welding
problems
• Make sure the TIG torch is connected to the power
source: Connect the TIG torch to the negative [-] welding
terminal. Connect the welding ground cable to the positive
[+] welding terminal.
• Use only 100% Argon gas for TIG welding.
• Make sure the regulator/flow meter is connected to the
gas bottle.
• Make sure the gas pipe for the TIG torch is connected to
the gas outlet connector (M12) on the front of the power
source.
• Make sure the work clamp has proper contact with the
work piece.
• Make sure the gas bottle is opened and check the gas
flow rate on the regulator/flow meter. The flow rate should
be between 4.7 – 11.8 l/min (10 - 25 CFH).
• Make sure the power source is turned on and TIG welding
process is selected.
• Make sure all connections are tight and leak-free.
No power/No arc
• Check that the input power supply switch is turned on.
• Check if a temperature fault is shown on display.
• Check if system breaker is tripped.
• Check that the input power, welding and return cables are
correctly connected.
• Check that the correct current value is set.
• Check the input power supply fuses.
The overheating protection
trips frequently.
• Make sure that you are not exceeding the recommended
duty cycle for the weld current you are using.
See the "Duty cycle" section in the "OPERATION" chapter.
• Make sure the air inlets or outlets are not clogged.
8.2
User interface (UI) software displayed error codes
The following table exhibits fault codes that may appear to assist in troubleshooting.
Severity Level Meaning (see
Severity Level
Column in table):
•
(C)
Critical Service Required - Unit not functional or locked, not recoverable
•
(NC)
Non-Critical - Service may be desired - unit functional with limited performance
•
(W)
Warning - Unit functional and will recover on its own
Error
Code
Severity
Level
Functional Circuit Failure Explanation
001
W
PFC Heatsink, IGBT Heatsink or Main transformer has overheated >
85 °C.
002
W
Output diode Temperature fault, Analog temperature sensor.
003
W/C
Warning
- If occurred during load/arc-start, cause is due to low input
AC volts - Err009
Critical
- If occurred at power-up under no-load condition.
DC Bus (400 V) fault droop under load, PFC not supplying 400 V to
inverter.
004
C
Output voltage is above VRD levels when VRD switch is active.
Summary of Contents for EMP 255ic
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Page 53: ...DIAGRAM 0463 605 001 53 ESAB AB 2018...
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