1. OPERATION
1-19
1.4.3 Alert icons and their meanings
1.5 How to Release the Fixed DRU
To release the Fixed DRU from its bracket (cra-
dle), do the following:
1. Turn off the BATTERY and AC switches in
that order to turn off the DCU power.
2. Remove the release pin.
3. Lift the release lever.
4. Lift the handle to separate the top of the
DRU from the bottom of the DRU.
5. Cut the cable connected between the top and bottom of the DRU.
1.6 How to Release the Capsule from the Bracket of
the Float-free DRU in Emergency Situation
In an emergency situation, release the capsule from the bracket of the Float-free DRU
to remove the capsule if possible.
Note 1: The following instructions are written based on the Jotron Tron 40VDR/Tron
40VDR AIS instructions. For detailed information regarding the Jotron Tron 40VDR/
Tron 40VDR AIS, see the user manual supplied with the VR-7021F/7024F.
Note 2: Do not drop the capsule from a high place.
Note 3: Do not release the capsule other than in an emergency situation or mainte-
nance. The silicone grease is applied to the bottom of the capsule to prevent water
Icon Alert state Visual Indication Audible alert
Alert priority: Warning (Legacy mode only)
Not acknowledged/
Not rectified
Yellow-orange, flashing 2 short, audible alerts re-
peated every 60 seconds.
Not acknowledged/
Not rectified,
Buzzer temporarily
silenced
Yellow-orange, flashing Silent
Acknowledged/
Not rectified
Yellow-orange Silent
Not acknowledged/
Rectified
Yellow-orange, flashing Silent
Alert priority: Caution
Caution Yellow Silent
Alert priority: Indication (BAM mode only)
Indication Yellow Silent
Release pin
Release lever
Handle
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