Repair work at electric and electronic components
8.8.1 Replacing the controller MB1 I/O Board (-3N2)
Spare parts:
Controller MB1 I/O Board 115/230V AC
(order no. 5014-0117)
Necessary tools Crosstip screwdriver, size 2
1.
Disconnect the unit from the power supply.
2.
Remove the housing cover of the lower front (chap. 5.1).
3.
Pull the electric mounting plate with the controller out of the machine room. (chap. 8.5)
4.
Mark the connection wirings and remove them from the controller.
5.
Remove the fixing screws and take out the controller board.
6.
Before installing the new board, check the configuration of the jumpers (chap. 8.8).
7.
Install the new board by following steps 1 to 5 in reverse order.
8.9 Replacing the controller display (-3N1)
Spare parts:
Display board
(order no. 5014-0182)
Necessary tools: Crosstip screwdriver, size 2
1.
Disconnect the unit from the power supply.
2.
Remove the triangle instrument box from the unit (chap. 6.3.1).
3.
Remove the screw with the grounding wire (B).
4.
Unscrew the screws (A).
5.
Remove the controller display (D) from the instrument box.
6.
Install the new controller display by following steps 1 to 5 in reverse order. Take care to fasten the
grounding wire again with screw (B).
7.
Adjust the temperature and humidity control (chap. 11).
D
A
C
B
A
Screws
B
Screw for grounding wire
C
Contactor for controller cable
D
Controller display
Figure 42: Replacing the controller display ( -3N1 )
Service Manual KBF (E5.2) 04-2015
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