RF Power HVLA1K3 PLUS - Troubleshooting

HVLA1K3 PLUS USERS MANUAL
Page
18
14 TROUBLE SHOOTING
The following table analyzes some common faults and their correction:
Fault
Possible Cause
Solution
AC mains not
operating
a)
AC fuses blown
b)AC cord not plugged
in
a)Replace with new ones
.
b)Plug in securely.
Can’t enter
Transmit
mode
a)Control cable not
connected
b)Protection circuits ON
a)Check the
control
cable and connect properly.
b)Check the drive power, antenna VSWR, wrong band
selected, antenna selector A or B, high temperature.
Reset with AC power switch.
Over
temperature
lights
a)Internal temperature
high
a)Ensure adequate airflow around the unit.
Keep the
cooling fins unobstructed. Also check the VSWR of the
antenna system since a high VSWR increases the heat
dissipation by the amplifier, causing faster temperature
rise. Reduce drive level or duty cycle.
Faults lights
a)High antenna VSWR
b)Wrong Band set
a)Check integrity of antenna and feedline connections.
Ensure antenna is resonant at the desired frequency.
b)Match the band correctly.
Over drive
lights
a)RF overdrive
a)Decrease drive.
TVI, EMI
a)RF overdrive
b)RF leakage from coax
cable, grounding wire,
AC power cord, etc.
a)Decrease drive.
b)Insert common mode filters on antenna cable or AC
line. Add clamps on ferrite cores on various cables.