User and Service manual JO960
Ver. 2.0
Ver. 1.1
13
Operator measures at malfunctions
If there is any malfunction JO960 automatically switches off and an
indicator is illuminated. The operator could then perform a preliminary
trouble shooting to solve minor problems.
If the indicator of the cooling unit has been illuminated it can be
due to:
-
Thermostat is incorrectly adjusted. Check the water
temperature. If the water is cold the thermostat is set at too
low temperature. Certain machines, that are equipped with a
turnable knob, should normally be set at zero. Thermostats
without a knob should normally be set at 15°.
If the water is warm and the machine has been used
continuously for a long time, it might be necessary to reset
the thermostat to a higher position and lower the
temperature.
-
Airflow through the machine is obstructed due to the fact
that the sides of the machine or the condensor (the cooling
unit) is filled with dirt. Cleaning of the condensor is
described on page 10. Before using the machine again the
high pressure safety pressostat must be reset, (See 5 on
Figure 2
).
-
Ambient temperature is too high. In extreme cases the
ambient temperature could exceed (50ºC). In this case the
high pressure pressostat must be reset manually. Check
that the cooling water has cooled down to a low temperature
before starting to work again.
Remark: Reset can only be done after the JO 960 hs been left
to cool down. During this period the JO960 should be
switched on at the main switch so that the cooling fan is
rotating.
Remark: Avoid placing the machine in sunny places.
