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PRESYS
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Instruments
4.6 - Hardware Maintenance Instructions
Prior to returning the instrument to factory check the following possible causes
of instrument malfunction.
Instrument showing display errors
After turning on the equipment start the test routine to check the RAM and
E2PROM integrity.
Should any of these components have problems the display will show the
following error codes:
Err. 1 - RAM error
Err. 2 - E2PROM error
In the event of a RAM error, turn the equipment off and then on again to check
whether the error message persists. If affirmative, return the instrument to factory.
In the event of an E2PROM error, press ENTER and reconfigure the
equipment. Turn the equipment off and then on again to check whether the error
message persists. If affirmative, return the instrument to factory.
During configuration the display may show the following error messages:
The message Err.3 will occur whenever output 2 is configured as a control
output and an attempt is made to configure it as an alarm relay (relay 2), or vice-
versa. To prevent this from happening, make sure to disable the related control
output 2 prior to enabling the alarm relay 2.
Note: In case there is an alarm relay module configured as analogic
output, the relay switches continuously.
If, during the auto-tune procedure the operator changes the type of control (by
changing from dual to SP.Re or Casc) or modifies the control algorithm (from PID to
ON/OFF) the display will show the following error message: Err.4.
Instrument display out
Check if power supply voltage is provided to terminals 23 and 24 of the
Controller.
Verify the integrity of fuse F1 of 2.0 A placed in the Power Supply Board as
shown in figure 34. Due to its package it is necessary to check the fuse continuity in
order to detect if it is broken.
Instrument malfunction
Check that if the Controller is correctly configured both in terms of software
and hardware (internal jumpers).
Examine if the optional modules are connected in the right spots.
DCY - 2057 Pressure Controller
Maintenance
Page 64
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