Nature of Fault
Probable Reason
Action to be taken
Unit does not turn
ON.
•I
nput auxillary supply
not coming.
•Input side fuse blown.
•Check the input supply
& restore.
•Check fuse in the unit
is OK & of Proper rating.
Unit does not turn
ON any capacitor
Banks even if PF is
below Lower PF
limit.
•The load kW is too low.
• Control connections
from TPF-56 Unit to
Thyristor Switch are not
proper.
•
Load may be highly
fluctuating not allowing
Auto-Synch.
• Disable Auto-Synch
and check connections
manually.
•Check control supply
and connections from
TPF-56 to Thy-Switch.
“BATTERY LOW!!!”
message on
Display
OR
BF Fault on
Display OR
Corruption of date
& time
.
In all these three
conditions, the battery
needs to be checked.
• Internal Lithium 3.0
Vdc battery CR2032 used
for RTCC, must have
been drained.
•
Replace this battery
with a brand new one of
original manufacturer.
•Battery Part Number is
CR2032 (Maxell Make)
• Observe correct
positive & negative
polarity while replacing.
Some Capacitor
banks are
declared as faulty
even if they are
checked to be OK.
•Individual step health
monitoring is enabled
and tolerance limits set
are too stringent.
•Set the kVAr tolerance
limits for individual
steps monitoring
appropriately
.
Fault finding Guidelines and Trouble shooting procedures
continued..
Intelligent Power Factor Controller TPF-56
Unit does turn ‘ON’
but ‘I AM OK’ LED
is steady ON or
steady OFF
Processor may be hanged. Switch OFF the TPF-56
Unit and again Switch it
ON.
LCD Display is not
properly visible.
The contrast of the LCD
may not be Set properly.
It may be either very low
or high.
Adjust the contrast of
the LCD using Left and
Right keys of the
Keypad. Left key reduces
the contrast whereas
right key increases the
contrast.
45 of 56
Version 1.1.5 22
nd
March, 2016
