Performance of a protective cap change
1. Switch main switch OFF and secure to prevent
switching back on.
2. Wait for compressor to cool down
3. Open the enclosure, create access.
4. Remove the protective cap of the moisture sen-
sor.
5. Fit new protective cap (tighten manually).
6. Shut enclosure.
7. Switch on the main switch.
8.8.8
Connection terminals in the switch
cabinet / control transformer set-
ting
DANGER
Electric shock
Life-threatening electric shock
➯
When carrying out any work on the
electrical equipment, exercise ex-
treme care.
➯
Before starting the maintenance
work, switch the compressor to a
voltage-free state and secure to pre-
vent switching back on.
DANGER
Electric shock
Life-threatening electric shock
➯
Work on the electrical equipment
must only be carried out by autho-
rised electricians or electrical techni-
cians.
➯
With the speed-controlled type-
s (
RS
) there is a risk of electric
shocks due to charged capacitors!
Switch the compressor voltage-free
and wait 10 minutes before touching
any electrical parts.
➯
Checking the DC bus voltage.
NOTICE
Material damage
Incorrect setting of the control transformer en-
dangers trouble-free operation.
➯
Checking of the setting of the control trans-
former forms part of commissioning and pe-
riodic inspection/maintenance, as the mains
voltage conditions may vary.
Checking the setting of the control transformer
forms part of commissioning and periodic in-
spection/maintenance, as the mains voltage
conditions may have changed.
The connection terminals in the switch cabinet are
to be checked during the first commissioning and
thereafter in accordance with the maintenance
plan and re-tightened if necessary.
435V 415V 400V 380V 360V
Check the setting of the control transformer
as follows:
•
Switch on system as in chapter “Routine com-
missioning”.
•
In on-load operation check the control trans-
former’s output voltages. A number of taps are
provided for this purpose (see circuit diagram).
If the output voltage is not correct, check the
setting of the control transformer as follows:
•
Switch main switch off and secure to prevent
switching back on.
•
With speed-controlled systems or fans (
RS
),
wait for 10 minutes. This the time it takes the
power capacitors to discharge.
•
Modify the setting of the control transformer ac-
cordingly (control transformer tap illustration
shows an example of this).
•
Then check setting once more.
