Nautel NV5 - Page 29

NV5/NV3.5 Troubleshooting Manual Responding to alarms
Issue 3.2 2014-12-10 Page 1-21
Module #: PS 1 (or 2)
AC Fail
(Module LED = green/red or amber) This alarm occurs if one of the
two module power supplies (1 or 2) is reporting an ac failure,
indicating its ac input voltage is less than 175 V ac. If a bank of power
supply modules are indicating an AC Fail alarm, it is possible that an
ac phase loss has occurred. Check the ac voltage applied to the
suspect power supply module. If the ac voltage is acceptable, replace
the module (see “Fan, IPA and Module Power Supply Replacement”
on page 1-43).
Module #: PS 1 (or 2)
Fail
(Module LED = green/red or amber) This alarm occurs if one of the
two module power supplies (1 or 2) is reporting a PS failure, indicating
its output voltage is outside its acceptable range, based on the control
setting. Check the dc voltage output of the suspect power supply
module. If the dc voltage is out of tolerance, replace the power supply
module (see “Fan, IPA and Module Power Supply Replacement” on
page 1-43). If the voltage is acceptable, suspect the control/interface
PWB (A1) or interconnect cabling.
Module #: PS 1 (or 2)
High Temp
(Module LED = green/red or amber) This alarm occurs if one of the
two module power supplies (1 or 2) is reporting a high temperature
alarm, indicating its operating temperature has exceeded its internal
threshold. The affected power supply is inhibited while this fault
exists. This alarm is most likely caused by a module fan failure or
blockage. Temporarily pull out the power supply module. After a few
minutes, re-insert the power supply module and attempt to
Reset the
alarm. Verify the power supply module turns on and its fan is
operational. If the fan is not operational, inspect it for possible
blockage. If necessary, replace the power supply module (see “Fan,
IPA and Module Power Supply Replacement” on page 1-43). If the
alarm persists after replacing the power supply module, suspect the
control/interface PWB (A1) or interconnect cabling.
Module #: PS 1 (or 2)
Not Present
(Module LED = green/red or amber) This alarm occurs if one of the
two module power supplies (1 or 2) is not being detected or has been
removed.
Module #: Power Up
Inhibit
(Module LED = red) The associated module has just been installed or
dc power has just been restored. The module will be inhibited until a
reset is received from the AUI.
Alarm (with Prefix) Description and Troubleshooting Action