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6. Maintenance / inspection
6.1 Initial inspection / Fault inspection
1. Initial inspection
Check that the applied load ( 24VDC, 4A or less ) is proper prior to closing the power source.
•
The mal-connection of power terminal, contact failure between DC input / output terminal and power
•
wiring, short-circuit in output wiring, etc. may result in a cause of serious damage.
Check that the power source is connected to the earth correctly and that the input / output wiring is
executed correctly prior to closing the power source.
Perform the wiring check to see that the commutating diode is not connected directly to the excitation
•
coil of clutch / brake to be connected to the control output terminal, and that the circuit across terminals
{PN] and [S2] is not short-circuited.
When it is necessary to measure the eqipment for dielectric strength and insulation resistor, proceed
•
as follows even if it is troublesome.
Note that performing the test in a wrong manner may cause the inside to be broken.
[1] Disconnect all wiring such as amplifire input / output wiring and power wiring.
[2] Measure the amplifire between all terminals and casing independendently for dielectric
strength and insulation resistance.
Dielectric strength
Insulation resistance : 5MW or over when measured with a 500VDC megger
Check that the power source is prepared commonly for 100VAC and 200VAC.
•
2. Fault inspection
When the proper output current fails to be assured even if the input signal is applied, perform the fault
inspection in accordance with the following procedure, referring to each display described furthe on.
The positions where the numeric display unit and LED are mounted are as shown below in the following
drawing.
[1] POWER display LED
Comes on when the power source is applied.
If the LED fails to turn on when 85 to 264VAC is
applied across the terminals [L] and [N], the am-
plifire must be defective.
[2] CV, CC display LED
"CV" LED comes on when the DIP SW4 to SW10
are all turned on ( voltage control mode ), and
"CC" LED comes on when the current is set to 0.2
to 4.0A (current control mode ).
"CC" and "CV" LEDs will not come on for other
cases.
It is normal the either LED comes on. When both
LEDs are found to be turned off, reexamine the
setting of DIP SW4 to SW10.
[3] RC ( remote control ) display LED
The RC display LED comes on when the RC input of amplifire is turned on, by which the control
output is executable.
If the "RC" LED is found not to be turned on, the control output is not executed.
Since the output is turned on with the RC input turned off, and turned off with the RC input turned
on when the inversion mode is set by the special operation ( shown on page ** ) , as to the RC
input, determine it in accordance with the LED display.
Even if the RC input mode is different, the control output is executed when the "RC" LED is turned
on.
[4] Output shu-off ( between PP and PN and between S1 and S2 )
When any load short-circuit is generated between the terminals PP and PN, and between S1 and
S2, the output may be shut off by the overload detection function.
In such a case, keep the power source shut off for more than 30 seconds after checking the ext-
renal connection, and re-close the power source, by which the trouble is normalized.
: 1,5000VAC for one minute
LED
display
POWER
CV
CC
RC
17
4-digit numeric display unit
POWER
CV
CC
RC
POWER AMPLIFIER
MODE
INC
▲
ＬＥ
PULL
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