3)
POWER UNIT INSPECTION
1)
Power
onit
operation status displays and alarm display lamps
(TR115A
control card)
Name
Lamp
Description of display
)P-
Pilot
PLll
Lights when DC voltage of rectifier unit is
srat-
approx.
80V;
off when approx. 40-50V.
Do NOT touch since capacitor is still charged
PW.
ON
LED1
Lights when
+24V
is supplied by DUC-1 cable
(green)
(ZP12
connector) from transistor amplifier.
Al-
THM
LED2
Lights when temperature of rectifier diode
arm
(red)
exceeds prescribed temperature.
sta-
Alarm for all axes.
tus
NFB
LED3
Lights when no-fuse breaker of rectifier
(red)
unit is tripped or when it goes OFF.
Alarm for all axes.
ALM
LED4
When multi-tap transformer or RU unit is
installed, the RU unit will be an alarm or
(red)
when transformer thermal is operated this
will be an alarm. Alarm for all axes.
FUSE
LED5
Lights when the
AClOOV
fuse or the fuse in
the
power unit output
(P) breaks.
Alarm for all
(red)
axes.
1
.J
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