IPG Photonics LC 340.01-A.3.5/6, Operating Manual, Page: 49 / 53

Interruption of Operation
Page 49
Operating manual LC 340.01-A.3.5/6 Current revision status: Apr 4, 2019
The maximum operating pressure of the refrigerant circuit is 27 bar. If this pressure is
exceeded, the compressor will be stopped. Please check following points step by step:
Failure Reason Corrective action
To little air flow a) Air filter dirty
b) Fan defectective
a) See 7.5.4
b) See 8.2.5.6
Air inlet temperature a) Ambient temperature
higher than 40°C
a) Check the installation
conditions
Reset of the alarm:
Look for the high pressure switch (see 6.1) and reset the alarm. Then press reset
button in LaserNet.
8.2.9 ELECTRIC PHASE CONNECTION WRONG
Alarm indication:
Alarm lamp
“
Alarms /
Sensor failed”
is lighting red. In the page
“Events“ “Electrical
phase connection is wrong
”
will be indicated.
Action:
If the compressor has been running for 5 seconds and the difference between high
and low pressure is less than 4 bars, the mostly reason will be that the rotation
direction of the compressor is wrong.
This alarm will stop chiller operation. Please check following points step by step:
Failure Reason Corrective action
Phases interchanged a) The rotation direction of
the compressor is
wrong
a) In case of wrong
rotating, disconnect the
chiller via main switch
and make sure that
nobody can switch on
again. The phases L1
and L2 have to be
reversed by and by an
authorised skilled
worker.
DANGER
DANGER:
The electrical connection has to be made by a skilled and authorized
worker.
For changing the phases L1 and L2 the chiller has to be
disconnected from electric power supply. Make sure that nobody
can switch on again.
Reset of the alarm:
After changing the phases L1 and L2, the chiller has to be reconnected to the line