Specifications

6-28 888-2500-001 5/2/2013
WARNING: Disconnect primary power prior to servicing.
DAX-1/DAX-3
Section 6 Troubleshooting
DC AMP PEAK
HVPS B+ DC peak current has exceeded the
9.0A per PA module factory set trip point
Transmitter 3-strikes off requiring
operator restart
DC CURRENT
HVPS B+ average current calculated by the
DSP has exceeded the 7.5A per PA module
limit
Transmitter 3-strikes off requiring
operator restart
DTG VOLTAGE
Indicates the Dead Time Generator DC voltage
measured on the Exciter/Controller has
exceeded the nominal voltage +/-10%. Normal
scaling for the DTG is 1V per 100kHz carrier
frequency
Transmitter 3-strikes off requiring
operator restart
ePDM VOLT
Indicates the Advanced Pulse Duration
Modulation (APDM) DC voltage measured on
the Exciter/Controller has exceeded the nominal
voltage +/-10%.
Normal voltage scaling for the ePDM
signal is: (F
ePDM
– 150kHz)*(2/50kHz)
+ 6.
Warning only -
Operator should reset power levels
to attain maximum performance
optimization
EQUIP INTLK
Indicates the equipment interlock loop
across J12-1 to 12-2 is open.
Transmitter turns off
FAN DRIVE
Occurs if DAX is on, but Fan Drive
command not enabled
Transmitter turns off
FAN FAULT
Multiple fan malfunction Transmitter turns off
FAN WARN
1 or 2 fans malfunction warning (operating
at <80 Hz)
Transmitter switches to low power:
44% of nameplate power
FILTERBOARD
Filter board is wrong range for current DAX
frequency, or not installed
Transmitter mutes and turns off
KEY FAULT
Indicates Hot-Swap Key has been inserted
for greater than 5 minutes
Transmitter turns off
MB(x) KEY IN
Hot-Swap Key is currently inserted for the
motherboard (x) indicated
Warning on screen. Illuminates PA
Module LED amber (after 5 minutes
transmitter turns off)
MB(x) PA INTL
PA interlock condition on the motherboard
(x) indicated
Illuminates Interlock LED on Front
Panel
+MODLTN WRN
Pre-FPGA processor positive overload
Warning indication only -
Check input signal level and exciter
controller R39 setting
Table 6-1 DAX Faults Listing (in alphanumeric order)
NAME DESCRIPTION
ACTION /
INDICATION