5-1
Accessory Troubleshooting
TP-5672 11/95
Section 5. Accessory Troubleshooting
This section contains a brief description, wiring
diagrams, and troubleshooting flowcharts for many of
the logic board accessories.
Refer to Appendix C for a comprehensive list of
commonly used accessories.
See Figure 5-1 for the relationship between the
microprocessor main functions and the affect that certain
accessories can have on those functions.
Accessory Affects
Options with
DD- Prefix
Option Description
Transfer
Normal to
Emergency
Transfer
Emergency
to Normal
Engine Start
Engine
Shutdown
Shunt Jumper-Controlled Options
23-C
Plant Exerciser
X
X
34-A
Inphase Monitor
X
X
34-J
Voltage Sensing
X
X
34-Z
Phase Rotation
X
X
100-B
Extended Time Delays
X
X
X
X
Other Options
05-K
Emergency Source Sensing
X
X
X
06-F
Two Position Test Switch
X
X
X
X
06-N
Three Position Test Switch
X
X
X
X
06-P
Three Position Test Switch
X
X
X
X
07-D
Four Position Test Switch
X
X
X
X
08-C
E-to-N Time Delay Override Switch
X
08-D
N-to-E Time Delay Override Switch
X
23-D
Plant Exerciser
X
X
X
X
23-G
Plant Exerciser
X
X
X
X
24-XX-A,B
Battery Charger
X
29-P
Manual Transfer--Both Directions
X
X
29-R
Manual Transfer--Both Directions, Key
X
X
29-S
Manual Transfer--E-to-N
X
29-T
Manual Transfer--E-to-N, Key
X
29-U
Manual Transfer--Both Directions with
Auto/Manual switch
X
X
29-V
Manual Transfer--Both Directions with
Auto/Manual Switch, Key
X
X
29-W
Manual Transfer--E-to-N with
Auto/Manual Switch
X
29-X
Manual Transfer--E-to-N with
Auto/Manual Switch, Key
X
35-N
Load Shed
X
X
Figure 5-1. Accessory Troubleshooting Grid
