IF302 - Operation and Maintenance Instruction Manual
4.2
If the problem is not presented in the table above follow the Note below:
NOTE
The Factory Init should be tried as a last option to recover the equipment control when the equipment
presents some problem related to the function blocks or the communication. This operation must only be
carried out by authorized technical personnel and with the process offline, since the equipment will
be configured with standard and factory data.
This procedure resets all the configurations run on the equipment, after which a partial download should be
performed.
Two magnetic tools should be used to this efect,. On the equipment, withdraw the nut that fixes the
identification tag on the top of the housing, so that access is gained to the "S" and "Z" holes.
The operations to follow are:
1) Switch off the equipment, insert the magnetic tools and keep them in the holes (the magnetic end in the
holes);
2) Feed the equipment;
3) As soon as Factory Init is shown on the display, take off the tools and wait for the "5" symbol on the right
upper corner of the display to unlit, thus indicating the end of the operation.
This procedure makes effective all the factory configuration and will eliminate eventual problems with the
function blocks or with the equipment communication.
Disassembly Procedure
Refer to Figure 4.1 - IF302 Exploded View Make sure to disconnect power supply before
disassembling the converter.
To remove the circuit boards (5 and 7) and display (4), first loose the cover locking (8) on the side
not marked “Field Terminals”, then unscrew the cover (1).
WARNING
The boards have CMOS components, which may be damaged by electrostatic discharges. Observe correct
procedures for handling CMOS components. It is also recommended to store the circuit boards in
electrostatic-proof cases.
Loose the two screws (3) that anchors the display and the main circuit board. Gently pull out the
display, and then the main board (5). To remove the input board (7), first unscrew the two screws (6)
that anchors it to the housing (9), and gently pull out the board.
Reassemble Procedure
Put input board (7) into housing (9).
Anchors input board with their screws (6).
Put main board (5) into the housing, ensuring all inter connecting pins are connected.
Put display (4) into the housing, observing the four mounting positions. "_" should point in the
direction desired as UP.
Anchors main board and display with their screws (3).
Fit the cover (1) and lock it using the locking screw (8).
Boards Interchangeability
Main and input boards are supposed to stay together, because calibration data from input board
circuit is stored in EEPROM of the main board.
WARNING
If, for some reason, you separate the input and the main boards, you must do a trim to guarantee precision of
the inputs. With mismatched boards, the factory trim will not be so good as it was.
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