Electrical system – 5000
Functional description
Order number Date Valid from serial number T-code
226057-040 2005-09-23 914369- 675
© BT Europe AB Service Manual LWE130 12- 17
Event: 8. Mechanical brake operation
Preceding event
4 or 5
Action(s)
Move tiller unit handle to upper or lower position.
Influencing
elements
Tiller switch [S10].
Resulting
conditions
Input [A1:INP TILLER SWITCH] goes {low}.
Brake coil [Y1] deactivated, mechanical brake applied.
Event: 9. Fork lifting
Preceding event
2
Action(s)
Depress the fork lift button [S34].
Influencing
elements
Fuse [F1].
Main contactor [K10].
Forks lift button [S34].
Secondary interlock [S171].
Battery charge status.
Lift limit [S31].
Resulting
conditions
[A1: INP.LIFT] goes {high}.
Pump contactor [K30] activates.
Pump motor [M3] starts.
Event: 10. Fork lowering
Preceding event
9
Action(s)
Depress the fork lowering button [S41].
Influencing
elements
Main contactor [K10].
Forks lower button [S41].
Secondary interlock [S171].
Resulting
conditions
[A1:INP.LOWER] goes {high}.
Magnetic valve - fork lowering [Y41] activated.
Table 6: Theory of operation
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