5-21
Accessory Troubleshooting
TP-5672 11/95
No
Yes
No
No
No
Yes
Yes
No
Yes
Yes
No
Yes
Is there 12 to 32 vdc between terminals
42A(+) and 2(--) on the relay board?
Is there continuity between
terminal TB-DC1-32 on the power
supply board and terminal 2 on
the relay board?
Is there 12 to 32 vdc between
terminals TB-DC1-23(+) and
TB-DC1-32(--) on the power
supply board?
Is the inline fuse between
terminal 42A on the relay
board and terminal
TB-DC1-23 on the power
supply board blown?
Is there 19 vac between terminals
TB-AC1-NAS and TB-AC1-NCS or
TB-AC1-EAS to TB-AC1-ECS on
the power supply board?
Does the terminal become grounded
at TB-DC1 when the event is active?
Refer to Figure 1a for leads and
functions of each contact.
Replace wire from terminal
TB-DC1-32 on the power
supply board to terminal 2
on the relay board.
Replace the leads
to the relay board.
Replace the
logic board.
Replace fuse.
Replace the leads from
terminal TB-DC1-23 on
the power supply
board to terminal 42A
on the relay board.
Replace power
supply board.
Is there rated line-to-line
voltage between terminals
TB-AC1-NA and TB-AC1-NC
or terminals TB-AC1-EA and
TB-AC1-EC on the power
supply board terminals?
Replace the power
supply board.
Sources not available.
No
Yes
Figure 5-25. Troubleshooting—Option DD-14, Auxiliary dry contacts relay boards do not operate
Make sure that the function you are testing is available,
i.e., ATS Not-In-Auto relay K10. For this relay to be
energized the Test switch must not be in the Auto
position.
Terminal number for
ten-relay board
Terminal number for
single-relay boards
Description Terminal Number
K1 K1 Normal Source Available TB-DC1-32
K2 K1 Normal Source Available TB-DC1-26
K3 K1 Emergency Source Available TB-DC1-18
K4 K1 Emergency Source Available TB-DC1-18
K5 K1 Contactor in the Normal position TB-DC1-28
K6 K1 Contactor in the Emergency position TB-DC1-27
K7 K1 System Alarm TB-DC1-19
K8 K1 System Alarm TB-DC1-19
K9 K1 Program switch not in the Off position TB-DC1-1
K10 K1 Test switch not in the Auto position TB-DC1-14
Figure 5-26. Option DD-14 Terminal Description
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