Citytrac 4200
Citymaster 1200
Citycleaner
Service Documents
For internal use only
Status
March 2009
Page
91 of 108
6.9 Switching functions
Work ride/Work mode (e.g. mower on)
1. G1:P () to fuse F6 (30A) (refer to Point 5 for further circuitry).
2. G1:P () flows via the fuse F5 (30A) to S1 (key-operated switch) terminal 19. If S1 is connected, B+ flows via terminal 58 to
F19 (7.5A), F7 (3A) and F15 (20A).
3. 3. B+ flows via F7 to K2:3 (seat contact control unit) and B8:2 BN (seat contact switch).
B+ flows via F15 (20A) to K2:1 and K2:2
4. If the seat contact switch B8 is closed, K2 connects relay K9 (enable mower) via Pin 5.
5. B+ flows via fuse F19 ( 7.5A) to K1:86; B- (earth) is connected via X40 and M1:50 to K1:85. Relay K1 is connected. B+ flows via
F6, K1:30, K1:87 to fuse F13 (10A) an on to switch S22 (work ride/work mode switch). B+ flows via the closed switch S22 to relay
K6:86. The relay connects B+ via K6:30 to K6:87 and further to F22 (7.5A) to switch S5 (mower/fan on) and to K7:30. At the same
time, B+ is connected to K7:86 via the open switch S5 (converter). Relay K7 is switched and B+ is connected via K7:30 and K7:87
to K9:30. K9 is switched by the seat contact control unit and seat contact switch. (The seat contact switch must be closed).
Switch S15 (lower device support) connects B+ via S15:1 and S15:2 and diode V8 to relay K4:86. The relay switches back and
enters automatic lock. Simultaneously, solenoid valve Y12 is energised via K4:30 / K4:87 and the brush unit is lowered.
B+ is switched parallel to K10:86 and the mower is enabled. S15 and K10 control the mower/fan is switched off when the device
support is raised and switched on again when lowered.
When the driver leaves the seat, K9 disconnects after 1 second and K7 is released from its lock, i.e. to switch the mower/fan on
again, the seat contact must be closed and switch S5 first turned to zero and then switched on again so that the mower/fan can
start up again.
Attention
!
Important safety function! Never bypass!
