1
2
3
Fig. 6-3: Check direction of rotation of fan motor (wa-
ter-cooled system)
[1]
Cooling air inlet
[2]
Cooling air outlet
[3]
Fan direction of rotation
The rotational direction of the fan motors can be
checked with the enclosure still closed.
1. Place a suitable ladder alongside the compres-
sor and use it to climb up.
2. Check the rotational direction.
The rotational direction arrow is visible through
the protective cover.
3. If the direction of rotation is wrong: Switch off
the compressor.
4. Switch the main switch OFF.
5. Correct the rotational direction. Change the
compressor rotating field.
Temperature start-up protection
The compressor does not start up at ambient tem-
peratures less than + 2 °C.
6.2
Normal operation
Electronic control unit
Fig. 6-4: Control panel
[1]
Touchscreen display
[2]
Start button < I >.
[3]
Stop button < O >
[4]
red LED
flashing slowly: warning or maintenance
flashing rapidly: Fault
[5]
yellow LED
flashing slowly: Maintenance necessary
[6]
green LED
lit up permanently: System in operation
Flashing: System in standby
[7]
Pushbutton <Emergency-stop>
DANGER
Risk of injury
The compressor can start automatically
at any time when it is in standby mode
with the green LED flashing.
➯
Do not carry out any work on the
compressor, if the green LED is
flashing.
Switching on
1. Press start button < I > on the control panel.
– The compressor is switched on.
– The compressor runs automatically (au-
tomatic operation). See the operating se-
quence description in the section "Operating
sequence" in the chapter "Design and func-
tion".
Operating conditions
During automatic operation, the compressor can
adopt any of the following operating conditions:
Ready to start (stand-by) [Ready to Start]
Operating under load [On-Load]