Elma LC130H, Service Manual, Page: 12 / 109

Trouble shooting / List of malfunctions
10
SM/Transsonic_LC/1104/D © Elma GmbH & Co KG
6 Trouble shooting / List of malfunctions
Find out if the malfunction is caused by a fault on the unit or by
improper use. Examples for malfunctions due to improper use:
Improper use
•
The cleaning result is not satisfactory:
The cleaning medium, the cleaning temperature or the
duration of the cleaning cycle are not suitable for the
cleaning task.
The cleaning result can also be impaired by a wrong or
insufficient filling level and/or very dirty cleaning liquid.
•
The unit does not heat up correctly:
For an efficient heating up of the cleaning liquid switch on
the ultrasound and use a cover. Please find further
instructions in
sections 8.5 and 9
.
Check and find out if the fault is in the heating or in the
ultrasonic system.
Check the housing and the bottom plate of the unit for any
visible damage and check the tank for leaks before you connect
the unit to an interrupting transformer.
Then connect the unit to an adjustable interrupting transformer
for a functional check. You can easily and safely check the unit
for a short circuit by slowly adjusting the mains voltage upwards
and observing the current consumption. At the same time you
can find out which functions of the unit have broken down.
If the unit does not indicate any current consumption although
the operating elements are switched on, or if the pilot lamp for
the ultrasound is not turned on and the heating remains cold,
the fuses of the interference filter are probably blown. A fault
due to a heating short circuit is very probable. Possibly, there is
also an interruption of the power supply of the mains cable or
the interference filter.
If the pilot lamp for the ultrasound is turned on but there is no
ultrasonic activity, the fault is on the generator pcb or in the
transducer system. For further information please see the
relevant sections and the following table of malfunctions and
remedies.
The PTC heating elements can only break down in case of a
short circuit which causes the total breakdown of the heating.
An insufficient heating temperature or incorrect temperature
regulation are generally caused by an unsuitable heating
process. Please find further information in
sections 8.5 and 9
.
Faulty unit
No ultrasound, no
heating
Ultrasound
Heating