KROHNE TIDALFLUX IFM 4110 PF EN - Manual (Page 62)

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8. Service
8.1 Replacing the power supply fuse
Power supply fuse in IFC 110 PF signal converter
Switch off the power supply before opening the housing!
1) Remove the cover from the terminal compartment (remove 2 screws).
2) Unscrew the cap of the power supply fuse F.
3) Replace fuse F1/F7, type 5x20 G, breaking capacity 1500 A (for Order No., see sect. 9)
F7: value for 100–230 V AC (85-255 V AC) 0.8 A T
F1: value for 24 V AC / DC (20.4-26.4 V AC / 18-31.2 V DC) 2.0 A T
Power supply fuse in IFS 4000 PF primary head
Switch off the power supply before opening the housing!
1)
Remove the cover from the primary head
2) Replace fuse in terminal compartment, type 5x20 G, breaking capacity 1500 A
value for 230 V AC: 0.1 A T
(115 V AC: 0.2 A T
24 V AC: 1.0 A T)
8.2 Retrofitting of magnetic sensors MP (optional)
Switch off the power supply before opening the housing.
1) Remove the cover from the terminal compartment (remove 2 screws).
2) Pull all cables out of the plug-in terminals.
3) Remove the glass cover from the control compartment (remove 4 screws).
4) Remove 4 screws from the front panel F, take hold of the handle on the upper end of the front panel and carefully pull
out the complete electronic unit of the signal converter housing.
5) Put down the electronic unit with the front panel F facing down (see illustration on the next page).
6) Position the 2 mm (0.08”) thick insulating strip (Order No. 3 15940.01) loosely on top of the MP printed circuit board
(PCB). The magnetic sensors and chip capacitor slip into the 4 holes in the insulation strip. Slip the MP PCB and
insulation strip from right to left between the front panel and BDE PCB, taking care that the MP PCB and insulating
strip are slipped through the three retaining clips H at the back of front panel F. Slip the socket connector of the MP
PCB onto the (5-pin) plug connector PL
MP
.
7) Fix the MP PCB with special steel tooth lock washer and nut S
MP
to establish contact between the back of the PCB and
the back of the front panel. When correctly fitted, the MP PCB must be slightly bent between the final retaining clip H
and the plug connector PL
MP
.
8) Re-assemble in reverse order (items 4 to 1 above).
9) Switch on the power supply. The “magnet active” LED on the front panel is green. The function of the corresponding
keys is tripped by touching the glass pane above the 3 white fields “
→
,
↵
and
↑
” with the bar magnet. The LED lights up
red, see sect. 4.2, items ² and ³.