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0171-761-EN
Trouble shooting
This chapter deals with some of the faults
which may occur when you operate the
UNISAB S-Control. Furthermore, possible
causes and instructions for rectifying the
problems are indicated. Please note the fol-
lowing before trying to trace a fault.:
·
UNISAB S-Control contains live parts
and must only be serviced by authorized
personnel.
·
Even though the power supply to UNI-
SAB S-Control is switched off, some of
the terminals may still be live.
·
Cut out the compressor motor starter to
prevent accidental start.
pressors).
Is the LED to the right of the transformer switched on?
Fault
No light in the front
Check the fuse.
Check the voltage.
--
--
If yes, proceed as follows:
-- Check the red and green LEDs through the holes in
the inside of the door.
If they are not lit, replace the computer (cover)
Coupling out due
The measuring value must be within the alarm limits.
Check the measuring value. If it is very high or low, check the
--
to alarm which
can’t be reset.
sensor for breaks or shorts.
--
(Please refer to the section entitled: Calibrating pressure transdu-
If the sensor is faulty, replace it.
--
If you replace the pressure transducer, remember to calibrate
--
it as described in: Calibrating pressure transducers.
cers when you replace the computer).
panel.
The sequence
This may be due to a faulty communications card.
regulation is not
functioning.
(2 or more com-
-- Check the cables
Check the jumpers S1 and S2.
Please refer to instruction no. 0171-732
--
LED 4 must be lit.
The LEDs marked TXD, TX-EN and RXD must flash to
indicate that communication is taking place.
If these checks do not rectify the problem, replace the communication
--
--
Possible causes
card.
Summary of Contents for UNISAB S-Control
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