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S.NO.
NOTICED
PROBLEM
6
Output
High
/Output Low
Garbage
Value
7
shown in display
Voltage
8
correction
properly
9
1)Input phase cut
off
shown
display
2)buzzer
continuously ON
3)no movement
of Variac
10
1)Display off
2)No movement
of Variac
11
1)Buzzer
continuously ON
2)Display Shown
Unregulated o/p
Voltage
3)NO Movement
of Variac
PROBABLE CAUSE
a) Faulty R-C network
b) Faulty Control Card
c) Fault in motor
Contactor Coil
Reflect on display
Losses coupling of Motor &
not
Variac
in
Loose connection input /
output voltage sensing
Connector.
1)Sensing
transformer
Faulty
2)loose connection
1) Limit Switch Connector
Faulty present on Display
card
2)Limit Switch Connected
wire Problem or loose
connection
a) Replace the R-C network
b) Replace the control card
c) Replace the motor
Voltage
Restart the stabilizer through mains
MCB
Variac gear tightness
Connect properly
1)Replace transformer
2) Connect properly
1)Check and replace the connector
2) Loose connection Tighten
3)Check Faulty wire And replace
REMEDY
40
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