Electrofusion Welder
26/07/2011
www.LaboratoryDrainage.co.uk
Pg 17
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.
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
The unit has detected that the supply voltage is more than 140 volts.
Check the supply voltage and if necessary use a different generator.
13: Low supply voltage <95v
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.
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