TP-5737 5/01 37Section 5 Decision-Makert 3+ Troubleshooting
Controller instrumentation not functioning properly.
Is there a loose input or component
lead connection at the AC fuse
terminal block or at the component?
Yes
No
Is there a blown 1.5-amp fuse at the AC
fuse terminal block? See Figure 5-21.
Replace the fuse.
Instrumentation is inoperative.
Replace or repair the component.
Secure the connection.
No
Yes
Figure 5 -22 Controller Instrumentation
Press the lamp test button.
Do the lamps light?
Lamp circuit board not functioning or not functioning
properly (i.e., fault lamps and alarm horn only).
Improper input signal. The
main circuit board is
inoperative.
Is the lamp circuit board receiving
power? Check for input voltage at
P4-6 and P4-1 soldered
connections on the lamp circuit
board. See Figure 5-24.
The panel circuit board is
inoperative. Replace it.
Is the P3/P4 ribbon connector
undamaged and properly connected?
Replace the
ribbon connector.
Replace the
main circuit
board.
Yes
No
Yes
No
Yes
No
Figure 5 -23 Lamp Circuit Board
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