Maintenance
6.6 Replacing the fuses
5235 / 05/2022 en
BENNING MM 7-2
45
6.6
Replacing the fuses
The device is protected against overload by means of two fuses. Replace a fuse if it is
defective.
Requirements
• Defective fuse inside the device
A non-functioning visual and acoustic jack control [
page 24] indicates a defective fuse.
• New fuse:
– F1: F 11 A, 1 000 V, 20 kA (or better), d = 10 mm, l = 38 mm, e. g. item no. 10218772)
– F2: F 0.4 A, 1 000 V, 30 kA (or better), d = 6 mm, l = 32 mm, e. g. item no. 10231514)
• Voltage-free device
• Slotted screwdriver and suitable Phillips screwdriver
F1
F2
Figure 17:
Fuse replacement (exemplary)
Procedure
1. Place the device face down (onto an anti-slip surface).
2. Dismantle the battery compartment [
3. Unscrew the six screws of the housing (two screws each under the foldable stand and the
battery compartment).
4. Carefully lift the bottom part of the housing off the front part.
5. Laterally lift one end of the defective fuse off the fuse holder by means of a slotted
screwdriver.
6. Remove the defective fuse from the fuse holder and dispose of them properly [
7. Insert the new fuse and position it centrally in the fuse holder.
8. Carefully reassemble the bottom of the housing and the front part. For this, make sure that
the rotary switch is in the “OFF” position.
9. Tighten the six screws of the housing.
10. Place the battery compartment back into the device and tighten the two screws.
