Arc Machines 227 - Manual (Page 41)

MODEL 227
OPERATION MANUAL
Doc # 740063 Rev E
SECTION IV - SYSTEM FUNCTIONS
4.6
FAULTS
4. GAS FLT - TORCH GAS FLOW is not detected. Fault creates an ALL
STOP if it occurs during a weld.
5. INPUT FLT - If the M-227 cannot achieve desired outputs because of
inadequate AC input. Fault creates a SEQ STOP of it occurs during a weld.
6. SENSOR 1,2,3 - User defined (see 4.7, 4.8 and 5.8).
7. BAD START - Indicates that the system was unable to sustain an arc.
8. STUB OUT - If the Arc Voltage gets too low or the electrode should touch
the puddle then a stub out will occur.
9. HIGH VOLTS - If the Arc Voltage gets too high a fault will occur.
10. GROUND FAULT - On Heads with Ground Fault Sense, if the Work
Ground is not connected to the Work piece the system will detect this and
prevent arc start.
11. OSC LIMIT - On Heads with OSC limit switches, if they are engaged the
system will create an ALL STOP.
12. AVC LIMIT - On Heads with AVC limit switches, if they are engaged the
system will create an ALL STOP.
The method of alerting the operator depends on what the fault is and when it
occurs. A problem with TEMP, LVPS or INPUTAC when the M-227 is first
turned on will create a FAULT SCREEN and the fault must be corrected before
the M-227 will proceed with any other functions.
A problem with COOL, GAS or SENSOR is common at power on or when
preparing for welding. These items will only create the FAULT SCREEN if they
occur during weld sequence. BAD START appears only during weld sequence
(after pre-purge) and does not create a fault screen.
STUB OUT and HIGH VOLTS will only occur during a weld and will cause an
ALL STOP condition. After postpurge the normal “return to home” sequence will
also be disabled.
4.15