Operating instructions

66
Chopper status LEDs
Rectier status LEDs
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Location of the power module status LEDs for variable-frequency drives 19XR-506---912 and 19XR-506---922
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Safety consideration reminder: For the access conditions to
the variable-frequency drive control box refer to chapter 1
of this document.
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14.1.1 - Isolation check
The voltages applied during tests with the unit energised
(isolation and dielectric) can damage the variable-frequency
drive.
When the motor isolation is checked, the power supply
conductors between the motor and the variable-frequency
drive must be disconnected.
14.1.2 - Disassembly and replacement of components in
the variable-frequency drive cabinet
Disassembly and replacement operations of parts in the
variable-frequency drive cabinet must be carried out by a
Carrier technician officially authorized and qualified to do
this work. This instruction must be observed to ensure that
the warranty conditions for the variable-frequency drive
are valid.
All connectors used on the electronic boards of the power
module are equipped with locks. Disconnection must be
easy by activating the unlocking mechanism.
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14.2.1 - Standard maintenance
The normal maintenance operations for electrical equip-
ment apply:
• Re-tightening of the electrical connections
• Elimination of dust
• Checking for signs of localised overheating.
14.2.2 - Variable-frequency drive cooling line
The variable-frequency drive cooling line includes a filter
that must be replaced once a year.
14.2.3 - Protection devices
Faults that occur on the functional components of the
variable-frequency drive cabinet are normally detected by
the control. For each reported fault, the diagnosis, the
possible causes and the corrective actions required are
described in the PIC III controls manual.
It is however not possible to obtain a fault report for the
destruction of the surge limiter (F) and the protection
fuses for the capacitor coils of the inlet filter (FU4/5/6).
Verification of these components is required at each
periodic maintenance visit.