Sony UVW-1800 Operating Instructions Manual page 65

If the unit is suddenly moved from a cold to a warm location, or used in a very
humid place, moisture from the air can condense on the head-drum. If the tape is
run in this state, the tape may stick to the drum, in which case it is highly likely to
be damaged. To lessen the risk of this occurring, this unit is fitted with a
condensation detection system.
If moisture condenses on the head-drum while the unit is operating
The indication "HUMID !" appears in the time counter display. The following
indication also appears on the monitor.
If this happens, the cassette is ejected automatically.
Before resuming the operation, wait until the alarm message disappears, without .
turning the unit off.
If the condensation warning appears immediately after powering on
Leave the unit powered on and wait until the indication disappears. While the
indication is present, it is not possible to insert a cassette.
Once the warning indication disappears, the unit is ready for use.
Chapter 8 Maintenance 8-3 (E)