Toro Groundsmaster 5900 Series Service Manual page 390

24 Volt Cooling Fans
4
1
5
3
8
6
7
g288619
1. Radiator cooling fan panel
2. Hydraulic oil cooler fan panel
3. 24 Volt cooling fan (4)
Electrical System: Component Testing
4. Flange head screw (16)
5. Flange nut (16)
6. Harness cover plate (2)
Groundsmaster 5900/5910 machines include two (2) panels of cooling fans. One
panel cools the radiator and the other cools the hydraulic oil cooler. Each panel
includes two (2) 24 volt cooling fans operating at the same speed and direction.
All four cooling fans are identical.
Each of the four (4) fan assemblies include the 24 VDC fan motor and a 12 VDC
fan controller. The cooling fan motors receive power from the 24 Volt system
contactor. Using inputs from the coolant temperature sender and the hydraulic
oil temperature sender, the master TEC works with the internal fan controllers as
necessary to control the fan speed and direction. In return, the fan controllers
provide a hard wired fault signal used as an input to the master TEC as the
cooling fans are not on the CAN−bus system (see
(page 6–8)).
Note: If a fault code is generated by a cooling fan, both fans in the panel must
be tested.
See 24 Volt System (page 6–7)
2
4
Figure 271
for additional fan operation information.
Page 6–128
5
3
7. Flange head screw (2)
8. Flange nut (2)
CAN−bus Communications
Groundsmaster
16227SL Rev B
® 5900 & 5910