Maintenance - Bitzer VARIPACK FD+6 Instructions De Service

No. Fault
30 Current sensor error
33 Error of low or high pressure transmitter
34 Low or high pressure cut-out
Tab. 7: Possible fault messages
For a list of the possible causes of a fault as well as for
the instructions regarding troubleshooting, see
BEST SOFTWARE.

10 Maintenance

DANGER
Life-threatening voltages inside the frequency
inverter housing!
Contact can lead to serious injuries or death.
Never open the FI housing in operation! Switch
off the main switch and secure it against being
switched on again.
Wait for at least 5 minutes until all capacitors
have been discharged!
Before switching on again, close the FI housing.
Authorized staff
Maintenance work may only be carried out by qualified
electricians. Current guidelines apply with respect to
the qualification and expertise of the specialists.
Information
For reasons of guarantee, reliability and quality,
only qualified staff may carry out repairs on this
device. Unless stated otherwise, VARIPACK
frequency inverters must not be dismantled. In
case of an operating fault, the VARIPACK fre-
quency inverter must be returned.
Regular and preventive maintenance work
As part of regular service work on the system:
• Check the switch cabinet filter mats and clean or re-
place them, if necessary.
Every 5 years as part of preventive maintenance:
• Replace the cooling fans of the power stack.
Replacing fans in the heat sink
Prior to performing maintenance work on
the VARIPACK frequency inverter:
CB-100-2
Warning
CAUTION
In operation, the heat sink of the VARIPACK fre-
quency inverter will get hot.
Risk of burns upon contact!
Prior to performing work on the VARIPACK fre-
quency inverter, disconnect the power supply
and wait for at least 15 minutes until the heat
sink has cooled down.
Dismounting the fan or fans:
• Remove the two screws at the top of the heat sink
and take off the fan protective grating.
• Take out the fan or fans, pull the plugs of the wiring
and insert the new fan or fans. Make sure that the
correct fan side points to the top. (see figure 30,
page 41).
• Then screw on the fan protective grating again (tight-
ening torque 1.3 Nm).
Fig. 30: Replacing the fans in the heat sink
Type
FDU+12 .. FGU+38
FHU+45, FHU+60, FHU
+73, FJU+105, FJU+145
FJU+87
Fault type
"Timed reset"
"Timed reset"
"Timed reset"
Part numbers of the fans
(in case of replacement)
343 034 05
343 034 06
343 034 08
41