NV5/NV3.5 Troubleshooting Manual Responding to alarms
Issue 3.2 2014-12-10 Page 1-19
Exciter A/B: +15V
Fail, -15V Fail, +5V
Fail, +3.3V Fail,
+1.8V Fail, +1.2V Fail
This alarm occurs if the associated low voltage dc supply is 10% high
or 10% low.
Module #: Alarm Fan
Inhibit
(Module LED = red) This alarm occurs if two or more fans fail while
the module is operating. Module PAs and IPA are inhibited. Requires
a reset from the AUI.
Module #: External
Inhibit Serial
(Module LED = red) This alarm occurs if the module receives an
inhibit message serially from the controller. The controller may inhibit
modules for various reasons.
Module #: External
Inhibit Switch
(Module LED = red) This alarm occurs if the module’s front panel
switch is in the ‘down’ position. Set the switch to its ‘up’ position and
initiate a reset via the AUI to enable the module.
Module #: Fan 1-6
Fail
(Module LED = green/red) This alarm occurs if the speed of one of
the associate module’s cooling fans is below 3000 RPM (half its
nominal value of 6000 RPM). Inspect the affected fan and, if
necessary, replace it (see “Module cooling fan replacement” on
page 1-39).
Module #: Heatsink
Temp Inhibit
(Module LED = red) The heatsink temperature of the module has
exceeded the AUI adjustable threshold. The module will be inhibited
and requires a
Reset from the AUI to re-enable. If this alarm is
accompanied by another alarm, troubleshoot the other alarm first. If
the alarm occurs on its own, see “Troubleshooting RF power
modules” on page 1-33 to determine whether to replace the affected
module or to repair damaged parts.
Module #: IPA
Forward High
(Module LED = green/red) This alarm occurs if the IPA PA’s peak
forward power is greater than the AUI adjustable threshold for the
operating mode and frequency. The module will continue to operate
unless the IPA’s peak forward power exceeds the IPA Forward
Shutdown threshold, which is 10 W greater than the IPA Forward High
threshold.
Module #: IPA
Forward Low
(Module LED = green/red) This alarm occurs if the IPA PA’s peak
forward power is less than the AUI adjustable threshold for the
operating mode. The module will continue to operate.
Alarm (with Prefix) Description and Troubleshooting Action
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