GE Industrial Solutions AF-300C AC Drive - Manual (Page 89)

GEK-85716
MAINTENANCE AND INSPECTION
So that the inverter may give extended pe-
riods of trouble-free operation and to prevent poten-
tial problems from the following items should
be periodically inspected.
WARNING BURN AND SHOCK HAZARD:
Do not conduct any Inspectlons until after discon-
necting the power supply and after the “CHARGE”
light on the inverter has gone out.
CAUTION: When removina or wires,
handle them the connector onlv and not bv the
wire itself. Be careful not to mix wires when recon-
necting them.
MEGGER TEST
CAUTION: Short all terminals as shown in Fiaure
7-1 and meqqer them all at one time. Do not meqqer
each terminal
3. Use a multi-meter set on a high resistance range
to conduct a continuity test on the control circuits
and not a megger or a buzzer.
PERIODIC PARTS REPLACEMENT
The life of the inverter will vary according to the
installation environment and the amount of running
time. However, if continuous operation is within the
allowable limits, the life of the DC Link capacitor is ap-
proximately five years and the life of the cooling fan is
approximately three years. It is recommended that
these parts be replaced before failure occurs.
INSPECTION ITEMS
Refer to the Inspection Items Chart in this section
for inspection points and corrective action.
NOTE: Perform test if necessary.
1. Disconnect all inverter terminals and never apply
test voltage to the inverter when conducting an
external circuit megger test.
2. Perform the test only on the main circuit as shown
in Figure 7-l when conducting a megger test on
the inverter itself.
-- Do not conduct a megger test on the control
circuits.
CONTROL CIRCUIT
TB5 TERMINAL BOARD
MAIN CIRCUIT TERMINAL BOARD
L2 L3 u v w N P
MEGGER
Figure 7-1. MAIN CIRCUIT MEGGER TEST CONNECTIONS
7-1