ACT4 Electrofusion Welding Unit – Operator Manual – Rev: 4.1.G
© 2008. Advance Welding.
Page 18
Fault Finding
During operation, the welding unit monitors all aspects of its operation. If a
fault occurs then an error message will be shown.
0: Weld OK
No Fault, weld completed OK.
1: Stuck button on start up
This fault shows when the power is first switched on. Either the Stop, Start, or
a keypad button is stuck in. Free the button to clear the fault.
2: Output fault before weld start
This fault shows when the power is first switched on. The unit will check the
output terminals to make sure no voltage is present when first switched on. If
this fault happens then the internal power relays have stuck in the closed
position. The unit will need to be returned for service.
3: Toroid thermal switch tripped
This fault happens when the toroidal transformer becomes too hot. This will
happen if the unit is used for a long period of time on large fittings. Let the
unit cool down and the fault will clear. If this happens when the unit is cold,
then there could be a bad connection on one of the internal plugs. In this
case, the unit will need to be returned for repair.
4: No calibration
This fault happens when the unit has no calibration. This will normally not
show, and if the unit has been calibrated, would be caused by a fault with the
internal memory. Return the unit for service.
5: Case temperature sensor fault (if fitted)
Some units have a case temperature sensor fitted to switch the unit off if the
electronics become too hot. This fault will show if the sensor is faulty. Return
the unit for service.
6: Case temperature out of limits (if fitted)
Some units have a case temperature sensor fitted to switch the unit off if the
electronics become too hot. This fault will show if the temperature is too hot.
Let the unit cool down.
7: Ambient temperature less than -40
o
C.
The unit has detected that the ambient temperature is very cold or the sensor
has broken. If the temperature is not below -40
o
C then the unit will need to be
returned to a service agent for repair.
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