ACT4 Electrofusion Welding Unit – Operator Manual – Rev: 4.1.G
© 2008. Advance Welding.
Page 19
8: Ambient temperature more than +600
o
C.
The unit has detected that the ambient temperature sensor has broken or a
wire has gone open circuit. The unit must be returned to a service agent for
repair.
10: Low supply frequency <40Hz
The unit has detected that the supply frequency is below 40 Hz. This will
normally be caused by a poor quality generator. If this fault happens then
check the supply or change the generator.
11: High supply frequency >70Hz
The unit has detected that the supply frequency is above 70 Hz. This will
normally be caused by a poor quality generator. If this fault happens then
check the supply or change the generator.
12: High supply voltage >140v (or 280v with a 220v supply)
The unit has detected that the supply voltage is more than 140 volts (280
volts with a nominal 220v supply). Check the supply voltage and if necessary
use a different generator.
13: Low supply voltage <95v (or 190v with a 220v supply)
This fault can be caused by a few problems. It could be that the generator is
running slowly and so the supply voltage is low. Try speeding the generator
up or use a different generator.
It could also be caused by a generator that is too small. If a large fitting is
welded, then a large amount of power will be needed from the generator. If it
can not supply this power then it will stall and the voltage will drop away.
Check that the generator is the correct size, if needs be try another generator.
It could be caused by the use of long extension leads. If a large fitting is
welded then a high current will be taken from the supply. If extension leads
are used, there will be a volts drop down the lead making the unit sense a low
supply voltage. Try not to use extension leads with the unit. If you have to
then use just 10 meters of 4.0mm
2
cable, the same size fitted to the unit.
14: Relay failed to latch on weld start
This fault could happen when the start button is pressed. If the main power
relays do not operate correctly then this fault will be shown. The unit needs to
be returned for service.
20: Low output volts (-1.25%)
This fault will happen if the output voltage is 1.25% lower than the set point
for more than 3 seconds. This can be caused by a generator that is not big
enough to supply the required power to the fitting. Check the size of the
generator and if needs be try another generator. It can also be caused by
using long extension leads with the unit. It is recommended that only 10
meters of extension are used, and the cable should be the same thickness as
the input lead on the unit (4.0mm
2
).
