48 1260 Infinity Micro Degasser Service Manual
6 Troubleshooting and Diagnostics
Hardware Symptoms
If the Status Indicator is Red
Sufficient vacuum is normally built up after the initial start- up and is
maintained by controlling the proportional valve as triggered by the
vacuum sensor.
If the vacuum cannot be reached, the micro vacuum degasser will be
forced into an error state. The error condition can be reset by turning the
micro vacuum degasser off and on again.
The following described failure conditions will appear during the start- up
procedure before the red error LED is turned on:
If the Status Indicator is Yellow and the Vacuum Pump is not
Running
✔ Remove the top cover (see “Removing and Refitting the Top Cover” on
page 55).
✔ Check the operation of the vacuum pump. Disconnect the vacuum tube
from the sensor assembly to the vacuum chamber at the vacuum
chamber (see “Removing and Refitting the Top Cover” on page 55) to
adjust the pressure inside the vacuum chamber to ambient conditions.
Switch the micro vacuum degasser off and on again. The vacuum pump
should start immediately.
✔ Use a test meter to check for + 24 V DC on the connector CN2 of the
control assembly between pin 1 and 2 (see “Overview of Internal
Parts” on page 66). This voltage is needed to operate the pump. If this
voltage is low, exchange the control assembly (see “Exchanging the
Degasser Control Assembly and the Sensor Assembly” on page 76).
✔ Check the resistance of the motor windings. The windings should have
a resistance in the kOhm range (use a test meter to check resistance
between red and blue, blue and black, black and red wires from
connector CN2 to the pump). If the windings are broken or shortened
replace the vacuum pump (see “Exchanging the Vacuum Pump” on
page 70).
To Next Page
Loading...
Need help?
General
