Hardware Maintenance Instructions - Presys DMY-2015 Technical Manual

Presys  Instruments
Return to factory calibration
The Indicator stores the factory calibration parameter values on the non-
volatile memory, which may be always recovered by Indicators with RTD input.
In case of a bad performance of the instrument due to an incorrect calibration,
use the REC option.
REC - is the option that allows to recover the factory calibration.
Enter level 5 of Calibration, select the REC option and press ENTER in order
to recover the values from factory.

4.5 - Hardware maintenance instructions

Before sending the instrument back to factory check the following probable
causes of a malfunctioning Indicator.
Instrument with error indication on display
After turning the instrument on, it tests RAM and E2PROM integrity.
When at least one of these components presents some problem the display
shows the following error codes:
Er. 01 - RAM error
Er. 02 - E2PROM error
In case of RAM error, turn the instrument off and on to check if the error
message is displayed again. If the error remains, return the instrument to factory.
When there is E2PROM error, press the ENTER key and configure the
instrument again. Turn the instrument off and on to check if the error message is
displayed repeatedly. If the error remains, return the instrument to factory.
Instrument with the display out
Check if power supply voltage is provided to terminals 35 and 36 of the
Indicator.
Verify the integrity of fuse F1 of 2.0 A placed in the Power Supply Board as
shown in figure 19. Due to its package it is necessary to check the fuse continuity in
order to detect if it is broken.
Instrument malfunction
Check if the Indicator is configured correctly.
Examine if the optional modules are connected in the right spots.
Check if the voltages on flat cable 1 as shown in figure 24 are close to the
values in table 14 and if they reach the CPU Board.
Maintenance
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DMY - 2015