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4 OM 1191

Safety

Use of Warnings and Notes

There are two types of safety instructions throughout this

manual:

• Notes draw attention to a particular condition or fact, or

give information on a subject.

• Warnings caution you about conditions which can

result in serious injury or death and/or damage to the

equipment. They also tell you how to avoid the danger.

The warning symbols are used as follows:

Electricity warnings warn of hazards from electricity

which can cause physical injury and/or damage to the

equipment.

General warnings warn about conditions, other than

those caused by electricity, which can result in physical

injury and/or damage to the equipment

DANGER

The MD5 adjustable speed AC drive should ONLY be

installed by a qualified electrician.

DANGER

Even when the motor is stopped, dangerous voltage is

present at the power circuit terminals U1, V1, W1 (L1,

L2, L3) and U2, V2, W2 (T1, T2 T3) and, depending on

the frame size, UDC+ and UDC-, or BRK+ and BRK-.

DANGER

Dangerous voltage is present when input power is

connected. After disconnecting the supply, wait at least

5 minutes (to let the intermediate circuit capacitors

discharge) before removing the cover.

DANGER

Even when power is switched off from the input terminals

of the MD5, there may be dangerous voltage (from

external sources) on the terminals of the relay outputs.

DANGER

When the control terminals of two or more drives are

connected in parallel, the auxiliary voltage for these

control connections must be taken from a single source

which can either be one of the drives or an external

supply.

DANGER

Disconnect the internal EMC filter when installing the

drive on an IT system (an ungrounded power system

or a high-resistance-grounded [over 30 ohm] power

system).

DANGER

Do not attempt to install or remove EM1, EM3, F1 or

F2 screws while power is applied to the drive’s input

terminals.

WARNING

Do not control the motor with the disconnecting device

(disconnecting means); instead, use the control panel

keys or commands via the I/O board of the drive. The

maximum allowed number of charging cycles of the DC

capacitors (i.e. power-ups by applying power) is five in

ten minutes.

WARNING

Never attempt to repair a malfunctioning MD5; contact

the factory or your local Authorized Service Center for

repair or replacement.

WARNING

The MD5 will start up automatically after an input

voltage interruption if the external run command is on.

WARNING

The heat sink may reach a high temperature. Note: For

more technical information, contact the factory or your

local Daikin representative.

Safety

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