Controller Test; Power Supply Test - Varian Turbo-V 70 Manual De Instrucciones

After the starting phase if the output connection is
shorted (output current higher than 2.2 A), the display
will be as shown in the following figure.
F A U L T :
S H O R T C I
Check connections and shortages between pump and
controller, then press the STOP RESET pushbutton
twice to start the pump.
If the pump rotational speed decreased below the
programmed speed threshold value, and the controller
OFF is selected, when R2 deenergizes, the display will
be as shown in the following figure.
F A U L T :
R 2 D E L A Y
Check for system leaks or gas load conditions, then
apply the reset signal b8 to restart the pump.
The following message is displayed if the fuse of the
transformer secondary blows:
C O N T R O L L E R
F A I
Since no operation can be carried out, contact
VARIAN.

CONTROLLER TEST

a) Equipment required
− Digital voltmeter (DVM) true RMS.
− Dummy load: 3 x 48Ω, 50 W each or
3 x 78Ω, 50 W each.
Potentiometer 50 KΩ, 1/4 W minimum.
NOTE
R C U I T
NOTE
O V E R
L U R E
b) Test set up
− Remove the pump connector from the
turbopump.
− Disconnect the Turbo-V controller connectors
(J17 and P16).
− Remove the cover from the Turbo-V controller.
− Set potentiometer to 30 KΩ and connect it as
directed in the following figure.
− Connect the hand-held terminal, check the line
voltage selector and connect J17 I/O connector,
and select the FRONT panel operation.
Dummy load connections

Power Supply Test

a) DC voltage test
Check the DC voltages referring to test points
indicated in the following figure. The meter should
read:
− + 5Vdc ±5%
− ±12 Vdc ±5%
− Ground reference = case of Q3
On the controller front panel, push the START
pushbutton and check:
− 54 Vdc ±10% between TP3(-) and TP5(+)
− 24 Vdc ±15% on the fan connector.
b) AC three-phase output voltage test
Connect P16 and on the pump connector connect
the DVM in turn between: pins B and C, B and D, C
and D.
The meter should read 44 Vac ±15%; a different
value of 0.4 Vac is tolerable between phase and
phase.
c) Front panel check
On the controller front panel, press the CURRENT
pushbutton and check:
− Current
− Power
− Speed
− Temperature
On controller front panel, press STOP and remove
J17 from the controller.
61
TECHNICAL INFORMATION
0.00 A
0.00 W
70 KRPM
25 °C ±2 °C
87-900-870-01 (B)