5-10 Accessory Troubleshooting
TP-5672 11/95
Time Delay Override Accessory
The Time Delay Override Accessory allows the user to
manually
override
the
emergency-to-normal
or
normal-to-emergency time delay. When the pushbutton
is pressed the corresponding transfer occurs
immediately. The two different Time Delay Override
accessories are listed below.
D
DD-08-C.
Emergency to normal time delay
override pushbutton
D
DD-08-D.
Normal to emergency time delay
override pushbutton
Wiring diagrams for these two accessories are in
Figure 5-11 and Figure 5-12. Refer to Figure 5-13 and
Figure 5-14 for troubleshooting flowcharts.
Troubleshooting The Bypass
Normal-To-Emergency Time Delay
Pushbutton
This section covers the steps to take to verify that the
Bypass Normal-to-Emergency Time Delay pushbutton
will override the normal-to-emergency time delay.
NOTE
Pressing the Bypass Normal-to-Emergency Time
Delay pushbutton causes the generator set to start and
run.
First ensure through the software that a minumum
5-second normal-to-emergency time delay is set. Next,
make sure that the emergency source is available.
Initiate a normal-to-emergency time delay by removing
the normal source, and then press the Bypass
Normal-to- Emergency Time Delay pushbutton.
If after pressing the Bypass Normal-to-Emergency Time
Delay pushbutton the normal-to-emergency time delay is
not bypassed, connect TB-DC1-3 to TB-DC1-34.
1. If grounding TB-DC1-3 causes the normal-to-
emergency time delay to be bypassed but the
Bypass
Normal-to-Emergency
Time
Delay
pushbutton is not operating, check the Bypass
Normal-to-Emergency Time Delay pushbutton and
the wiring to the Bypass Normal-to-Emergency
Time Delay pushbutton.
2. If after grounding TB-DC1-3 the normal-to-
emergency time delay is not bypassed, check the
continuity between P2-3 and TB-DC1-3.
a. Remove power from the logic board.
b. Disconnect the P2 ribbon cable connector from
the power supply board.
c. Using an ohmmeter, connect one test lead to
P2-3 on the power supply board. Connect the
other test lead to TB-DC1-3. If there is an open
circuit, replace the power supply board. If the
resistance is low, the main logic board is bad.
Replace the logic board assembly.
S2--4
133
TBDC1--33
TBDC1--4
104
104
S2
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
16
15
14
13
12
11
10
17
MICROCONTROLLER
TB--DC1
TB--AC1
ECS
EAS
NCS
NAS
LC
LB
LA
EC
EB
EA
NC
NB
NA
S2--3
133
9
8
7
6
5
4
3
2
1
4
3
NO
Wire Code Example
S10--13— 201
Device Name
Wire Number
Device Terminal
Number
5604519
Figure 5-11. Wiring Diagram— Time Delay Override, Option DD-08-C
