Arc Machines 207 - Manual (Page 66)

MODEL 207A AND 207A-1
OPERATION MANUAL
Doc. No. 740044
Rev F
SECTION VII - CALIBRATION
7.4 SYSTEM FAULT CORRECTIONS
3. GAS - This fault will only occur at the beginning of or during a Weld
Sequence. If the arc gas flow through the system should stop, or be to
low, a fault will occur.
Check that the Gas Source (user supplied) is turned on and that adequate gas is
available. Check all Gas Hoses and connections for free flow, this is usually
the problem.
If there is no problem with the source or with hoses and connection then an
internal failure of the flow switch, solenoid or internal hosing is possible.
Contact an AMI Service representative.
4. LVPS - The system continuously monitors its internal Low Voltage (DC)
Power Supplies. If they are not up to standard then the system may not be
able to perform to specification.
There are several ways this could occur. The most common would be too low
of an AC input voltage. Check the line voltage to see that it is correct and that
the Power Supply is set up for that voltage (see sections 3).
The other reason would be a failure of the LVPS. Always check the AC input
first and if that is O.K. call an AMI Service representative.
4. COOL - Monitors the coolant flow out of the optional cooling unit.
If it is not at least 0.2 GPM a fault will occur. This fault will only exist
if the CW unit is turned ON. If it is off no fault will occur.
Check the hoses and flow path of coolant to and from the weld head, this is
usually the problem. If all looks good then an internal failure of the CW
pump or flow switch is possible, contact an AMI Service representative.
5. SENSOR 1, 2, 3 - These faults must be turned on and set up by the user.
Contact whoever set them up.
7.7