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NG1000 Troubleshooting Manual
Responding to alarms
Page 1-8
Issue 0.4 2010-10-12
Coax Switch Fault
EXTERNAL
This alarm occurs when the RF coaxial switch’s
position does not agree with the desired switch
position command. The system RF output is inhibited
by opening the associated transmitter interlock
circuits. If the alarm persists, replace the RF coaxial
switch (see
“RF Coaxial Switch Replacement” on
page 1-26
).
DIn1(J11A-1) Fault
EXTERNAL
This alarm occurs when the digital input applied to the
auxiliary digital input 1 (pin 1 on
AUX I/O
connector
A1J11A) is in an alarm sensing condition, defined by
the user.
DIn2(J11A-2) Fault
EXTERNAL
This alarm occurs when the digital input applied to the
auxiliary digital input 2 (pin 2 on
AUX I/O
connector
A1J11A) is in an alarm sensing condition, defined by
the user.
DIn3(J11A-3) Fault
EXTERNAL
This alarm occurs when the digital input applied to the
auxiliary digital input 3 (pin 3 on
AUX I/O
connector
A1J11A) is in an alarm sensing condition, defined by
the user.
DIn4(J11A-4) Fault
EXTERNAL
This alarm occurs when the digital input applied to the
auxiliary digital input 4 (pin 4 on
AUX I/O
connector
A1J11A) is in an alarm sensing condition, defined by
the user.
Sys Con Pri (or Sec)
AC High
EXTERNAL
This alarm occurs when the primary or secondary ac
source voltage applied to the system controller (A1) is
greater than 134 V. Check the ac power sources. If
they are OK, suspect a fault with the system controller
PWB (A1). To replace a system controller PWB, see
“System Controller PWB Replacement” on page 1-23
.
Sys Con Pri (or Sec)
AC Low
EXTERNAL
This alarm occurs when the primary or secondary ac
source voltage applied to the system controller (A1) is
less than 92 V. Check the ac power sources. If they
are OK, suspect a fault with the system controller
PWB (A1). To replace a system controller PWB, see
“System Controller PWB Replacement” on page 1-23
.
Alarm (with Prefix)
Alarm/Status LED
Description and Troubleshooting Action
Summary of Contents for NG1000
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Page 8: ...NG1000 Troubleshooting Manual Table of contents Page viii Issue 0 4 2010 10 12 ...
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Page 14: ...NG1000 Troubleshooting Manual Page xiv Issue 0 4 2010 10 12 ...
Page 22: ...NG1000 Troubleshooting Manual Page xxii Issue 0 4 2010 10 12 ...
Page 56: ...NG1000 Troubleshooting Manual Responding to alarms Page 1 34 Issue 0 4 2010 10 12 ...
Page 122: ...NG1000 Troubleshooting Manual Wiring connector lists Page 3 10 Issue 0 4 2010 10 12 ...
Page 128: ...NG1000 Troubleshooting Manual Reading Electrical Schematics Page 4 6 Issue 0 4 2010 10 12 ...
Page 153: ...Issue 0 4 2010 10 12 MD 6 Figure MD 6 NAPE82 Exciter Control PWB ...
Page 159: ...Issue 0 4 2010 10 12 MD 12 Figure MD 12 NAPA24 PA PWB C1 C2 C8 Q1 ...
Page 162: ...NG1000 Troubleshooting Manual List of terms Page 6 2 Issue 0 4 2010 10 12 ...
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