GE Fuji Electric MICRO-SAVER AF-300, Instructions Manual

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S e c t i o n 7 M A I N T E N A N C E a n d I N S P E C T I O N
So that the Af-300 give long periods of trouble-free and to prevent
problems from the following checks should be periodically conducted.
CAUTION: Do not conduct any after
the power supply and after the on the has gone out.
MEGGER TEST
1. Disconnect all Drive terminals and never apply test voltage to the Drive when conductrng an external circuit
megger test.
2. Perform the test only on the main circuit as shown in Figure 7-1 when conductrng a meggertest on the Drive itself.
Do not conduct a megger test on the control circuits
Short
L2, L3, U, V, W, and DB, then megger to ground
3. Use a resistance range type tester to conduct a test on the control circuits and not a megger or a
buzzer.
PERIODIC PARTS REPLACEMENT
The life of the Drive vary according to the installation environment and the amount of running time However,
continuous operation
IS
the allowable the of the dc Link capacitor
IS
five years and the
life of the cooling fan is approximately three years. It
IS
recommended that these parts be replaced before failure
occurs.
IF SINGLE PHASE
AC Induction
Motor
Figure 7-1. MAIN CIRCUIT MEGGER TEST CONNECTIONS
7-1