48 Vdc System Protection Diode - Toro Reelmaster 5010- H Service Manual

48 VDC System Protection Diode

The Reelmaster 5010- H 48 VDC system includes a
diode that is used for circuit protection from voltage
spikes when the main contactor is de- energized. The
diode plugs into the main wire harness near the 48 VDC
battery disconnect and main contactor under the opera-
tor seat (Fig. 64).
Protection Diode Testing
1. Park the machine on a level surface, engage the
parking brake, lower the cutting units and stop the en-
gine. Remove the key from the ignition switch.
2. Raise operator seat.
3. Separate system components from the 48 VDC bat-
tery pack by unplugging the 48 VDC battery disconnect.
(see 48 VDC Battery Disconnect in the General Informa-
tion section of this chapter). This will prevent unex-
pected 48 VDC system component operation.
4. Locate protection diode near 48 VDC battery discon-
nect and unplug the diode from the wire harness for test-
ing.
5. The protection diode (Fig. 65) can be tested using a
digital multimeter (diode test or ohms setting) and the
table to the right. Replace the protection diode if testing
determines that it is faulty.
NOTE: Protection diode terminals 2, 3, 4 and 5 are not
used on Reelmaster 5010- H machines.
6. After testing is complete, make sure that protection
diode is fully installed into wire harness connector.
7. Plug the 48 VDC battery disconnect back into the
socket. Lower and secure operator seat.
Electrical System
1. Protection diode
2. 48V battery disconnect
6
5
4
Multimeter
Red Lead (+)
on Terminal
6
1
Page 5 - 66
1
2
Figure 64
3. Main contactor
Figure 65
Multimeter
Black Lead (- ) Continuity
on Terminal
1
6
Reelmaster 5010- H
3
1
2
3
YES
NO