Fault experienced Possible cause
HV FAULT fault Contact your distributor
DC BUS FAULT fault Contact your distributor
PFC FAULT fault Mains supply lower than the minimum 99 V
EXTERNAL INTERLOCK TRIP
fault
External interlocks activated code active
External interlock cable damaged/severed
If external interlock is not used, check user
interface connector mating half has a link
between pins R and P (see section 5.2)
REFLECTED POWER TRIP fault Poor match with external equipment
External waveguide incorrectly fitted or
damaged
Protective bung still fitted to amplifier wave-
guide output or other foreign object within
waveguide (including water/moisture)
MEAN HELIX OVER CURRENT
TRIP fault
Contact your distributor
PEAK HELIX OVER CURRENT
TRIP fault
Contact your distributor
INTERMODULATION PRODUCTS
too high / out of specification
With the upconverter option, L-band drive
level too high (see section 4.4)
UPCONVERTER fault
With the upconverter option, 10 MHz locking
signal not present on L-band input of the
upconverter; check correct connection of L-
band input cable and correct operation of
previous equipment
UPCONVERTER SIGNAL ‘out of
lock’ but no UPCONVERTER fault
indication
With the upconverter option, L-band drive
level too low (see section 4.4)
HBN63xx-1, Issue 8, Page 42
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