Harris DX 25U Technical Manual page 31

3.6.2.8 RF Amp Fuse
The transmitter will continue to operate safely, although power
output will be slightly reduced. The fault indication can not be
888-2297-002
WARNING: Disconnect primary power prior to servicing.
RESET. The fault must be corrected to clear the fault indication.
Continue normal operation and contact qualified maintenance
personnel.
Section III - Operation
3-3