Tait TM8260 User Manual page 66

Action and tone
two high-pitched beeps Radio's temperature is very high: the radio's
continuous low-
pitched tone
two long low-high
pitched tone pairs
Meaning
temperature is in the very high temperature range
and all transmissions will now be at low power; if
the radio's temperature rises outside this range,
transmissions will be inhibited
Radio system error: a system error has occurred
and the radio may be inoperable
Synthesizer is out-of-lock: the radio's synthesizer
is out-of-lock on the current channel and you
cannot operate on that channel
Troubleshooting 67