1.2. Checking the batteries
• Remove the top cover.
» see step 4.2.
• Remove the red and black wires from the batteries and measure the
voltage across the contacts of the three batteries in series.
•• If no voltage is present
» fit a new fuse between the batteries.
•• If a voltage is present
» proceed to the following step
• Apply a resistance of 2 x 2.2 Ohm 100 Watt to the batteries in series
for 5 seconds whilst measuring the voltage. After 5 seconds the volt-
age should not drop below 21 V. • Allow the battery to recover for
10 seconds and repeat the test.
•• If the voltage is lower than 21 V
» change the batteries (see step 4.6) + test the operation of
the device and go to step 1.5 + step 1.6.
•• If the batteries recover well and more than 21 V is indicated,
reconnect the red and black wires to the batteries
» go to step 1.3 (motor test)
1.3. Testing the motor
• Remove the cable clips (fastons) from the motor.
• Then apply 24 V DC directly to the contacts of the motor. Repeat
this test with reversed polarity.
•• If the motor rotates in both directions
» go to step 1.4.
•• If the motor does not rotate in both directions. Fit a new motor
» see step 4.8.
CAUTION!
AS 24 V D.C. IS APPLIED DIRECTLY TO THE MOTOR,
THE END-OF-RUN SWITCHES NO LONGER WORK.
THEREFORE ENSURE THAT THE MOTORBAND DOES
NOT ROLL UP INTO THE DEVICE FULLY OR BECOME
TWISTED.
• Reconnect the cable clips (fastons) to the motor.
p. 4
2540 / 2545 • REPAIR
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