Husqvarna DM400 Operator's Manual page 11

Safety devices on the product
WARNING: Read the warning instructions
that follow before you use the product.
• Never use a product that has faulty safety
equipment! If your product fails any checks contact
your service agent to get it repaired.
• Do not use the product if protective plates, protective
covers, safety switches or other protective devices
are not attached or are defective.
Motor overload protection, Elgard
The motor overload protection engages if the motor has
too high load or the drill bit cannot move freely.
The motor overload protection causes the power from
the motor to decrease and increase in short intervals for
some seconds. Then, if you do not decrease the force,
the motor stops. Refer to
protection on page 14 .
Load indicator
CAUTION: Product overload again and
again can cause damage to the product.
The product has LEDs that show the load of the motor.
LED indications on page 18 .
Refer to
PRCD
WARNING: Not applicable for 110V type
sold in United Kingdom and Ireland. United
Kingdom and Ireland: Do not operate the
110V type of the product without an isolation
transformer, refer to EN/IEC 61558-1 and
EN/IEC 61558-2-23. The isolation
transformer must have a grounded earth
wire on the secondary winding side.
WARNING: Do not put the PRCD into water.
WARNING: Before you operate the product,
always do a check of the PRCD. Refer to
examine the PRCD on page 11 .
The product has a PRCD installed on the power cord.
The PRCD is for protection and engages if an electrical
Technical data on page 17 for
fault occurs. Refer to
information about at which current the PRCD engages.
The red light shows that the PRCD is on and that the
product can be started. If the red light does not show,
push the RESET button.
(Fig. 7)
1188 - 008 - 14.09.2020
™
To reset the motor overload
To examine the PRCD
WARNING: Not applicable for 110V type
sold in United Kingdom and Ireland. Refer to
PRCD on page 11 .
WARNING: The PRCD must be examined
each time the power plug is connected to a
power outlet.
WARNING: If the PRCD must be repaired,
always speak to an approved Husqvarna
service agent.
1. Connect the power plug of the product to a power
outlet.
2. Push the "RESET" button. The indicator above the
button is red when the current is connected.
3. Start the product, refer to
page 13 .
4. Push the "TEST" button. If the product stops, the
PRCD operates correctly. (Fig. 8)
ON/OFF switch
The ON/OFF switch is used to start and stop the
product.
(Fig. 9)
To examine the ON/OFF switch
1. Connect the power plug of the product to the mains.
2. Set the ON/OFF switch to "1" to start the product.
3. Set the ON/OFF switch to "0" to stop the product.
Friction clutch
The friction clutch is integrated in the gearbox of the
product. It prevents damage to the product if the drill bit
stops during operation. If the load is too high, the friction
clutch is released and stops the drill spindle but keeps
the motor on for some seconds. The friction clutch
engages again if the load is decreased and the
operation can continue. If the drill bit is caught in the
material and fully stops, the friction clutch stops the
motor immediately.
CAUTION: Make sure that the release time
To
of the clutch is not more than 3-4 seconds,
because if not wear and heat will increase
quickly.
Safety instructions for maintenance
WARNING: Inspection and/or maintenance
should be carried out with the motor
switched off and the plug disconnected.
To start the product on
11