Replacement Procedure - Honeywell UDC3500 Instruction

Replacement Instruction,
Replacement
procedure
01/06
Continued
Table 3 Board Replacement Procedure
Step
1 Identify the Board to be replaced from Figures 3 through 6.
Replace that board with the new one.
2 The small boards shown in Figures 4, 5 and 6 (Optional Input,
Third Current Output and Dual Relay Output) are held onto the
major boards with posts. If replacing one of these small boards or
the major boards they are attached to, then locate the ends of the
posts on the back side of the Major Board.
Use small pliers and squeeze the ends of each post together and
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push it up through the board.
Remove the small boards. Replace as needed. Posts must be
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pushed all the way through the Major Board until they snap into
place in order to ensure a good electrical and mechanical
connection.
5 The Third Current Output and Dual Relay Output boards must be
fully seated into the socket in order to ensure a good electrical and
mechanical connection.
Table 4 Chassis Reassembly Procedure
Step
1 Install the Display/Keyboard into the chassis. There are four slots
cut in the Bezel. Place the bottom of the Display/Keyboard into the
slots and then press the top of the display in until it snaps in place
in the slots. See Figure 7.
2 Assemble the Optional Relay board onto the Power/Output Board.
Start these boards as a pair into the chassis groves and carefully
push them in until they snap into place. See Figure 8.
Assemble the Communications board over the capacitors on the
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MCU/Input board. Start these boards as a pair into the chassis
groves and carefully push them in until they snap into place. See
Figure 9.
4 Make sure the connections to the display/keyboard assembly are
made and that the release points on the chassis snap into place on
the printed wiring boards. See Figure 10.
5 Reinstall the WG wires onto the Power/Output Board. See Figure
11.
6 Reinstall the chassis into the case.
Kit Instruction 51-52-33-153
Action
Action
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