GV60 TROUBLESHOOTING MANUAL
RESPONDING TO ALARMS
PAGE 4.1.12
VERSION 1.0 2018-01-01
Controller: External
Interlock Open
(External Interlock)
Exciter (red)
The external interlock input wired to the controller (A4) or optional remote
interface PWB (A16), if used, is open. Check the interlock connection
between REMOTE I/O-A pins 19 and 20 on the controller (verify a ground
potential at pin 19) or optional remote interface PWB J2 pins 19 and 20 or
TB1-1 and 2. If the interlock is intact, check all external interlock switches.
Otherwise, suspect a problem with the interlock circuitry on the controller
or optional remote interface PWB.
Controller: External
Reject Interlock (Ext
Rej Interlock)
Exciter (red)
Applicable only to transmitters configured with the external reject load
option. The external reject interlock input wired to the module control /
interface, is open. Check that the interlock connection is intact and that ac
power is applied to the external reject load.
Controller: External
Reject Load Shutback
Output Network (red) Applicable only to transmitters configured with the external reject load
option. This alarm occurs if the transmitter's reflected power exceeds the
external reject load shutback threshold (22500 W).
Controller: External
Summary
-
Not displayed in AUI or UI status. Configurable as a remote output.This
alarms occurs if there are any external related alarms present. Check for
specific external related alarms and troubleshoot accordingly.
Controller: Fan Fail
Output Network
(amber)
This is an indicational alarm only that is displayed when the controller’s
cooling fan has been enabled and the speed of the fan is below 2000 RPM.
Controller: Final
Reject Fan 1 - 4 Fail
(Final Rej Fan1-4 Fail)
Output Network
(amber)
This alarm occurs if the final reject loads (A13 and A113) cooling fans are
enabled and the speed of a cooling fan [B2 (1) or B3 (2) in Cabinet A; B102
(3) or B103 (4) in Cabinet B] is below 2000 RPM. Final reject load cooling
fans are enabled only when the reject load power is greater than 300 W,
possibly due to an RF power module removal or failure. Inspect the fan and,
if necessary, replace it (see
).
Controller: Forward
Power Limiting (Fwd
Power Limiting)
Output Network
(amber)
When the High Forward Power alarm is active, this alarm occurs if the high
forward power limiting threshold is exceeded [1.063 times the maximum
power setting for all modes; e.g., 70,160 W for FM mode]. The transmitter
will fold back the forward power each time the threshold is exceeded. This
alarm occurs only if the controller ALC cannot respond fast enough to
transmitter load changes. Suspect the module control/interface PWB (A3).
Controller: Forward
Power Shutdown
(Fwd Power
Shutdown)
Output Network (red) This alarm occurs if the transmitter tries to reduce the forward power below
minimum due to repeated Forward Power Limiting alarms. The transmitter
latches off. See Controller: Forward Power Limiting for troubleshooting tips.
Device and
Alarm Name
(AUI, UI)
Controller Front
Panel LED (color)
Description and Troubleshooting Action
Summary of Contents for GV60
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Page 102: ...GV60 TROUBLESHOOTING MANUAL PARTS LISTS PAGE 4 2 12 VERSION 1 0 2018 01 01 ...
Page 463: ...VERSION 1 0 2018 01 01 MD 17 Figure MD 17 NAPA31C Power Amplifier PWB Q1 ...
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