Toro Reelmaster 5010- H Service Manual page 167

Fault Code
75 High temperature warning for motor/generator
76 System voltage under 32 VDC has disabled #1
cutting unit
77 System voltage under 32 VDC has disabled #2
cutting unit
78 System voltage under 32 VDC has disabled #3
cutting unit
Reelmaster 5010- H
Fault Description
Page 5 - 27
Service Suggestions
Make sure that hood screen is clean
Check that air intake to motor/generator is not
restricted or blocked and that air is moving
through intake when engine is running
Check for motor/generator cooling fin debris
obstruction
Let machine cool to lower motor/generator
temperature
Reduce cutting system load by reducing reel
speed, reducing mow speed or by opening the
rear discharge of the cutting unit
If this fault continues to occur when the ma-
chine is not at full operating temperature,
consider that the motor/generator is faulty
NOTE: A faulty sensor will not cause this fault
Check logic power connection to #1 cutting
unit
If this fault is displayed for more than one
cutting unit, check 48 VDC battery voltage
when engine is OFF and also check 48 VDC
logic relay and circuit wiring
If 48 VDC battery voltage is correct when en-
gine is OFF but drops when engine is ON, con-
sider that motor/generator is faulty
Check logic power connection to #2 cutting
unit
If this fault is displayed for more than one
cutting unit, check 48 VDC battery voltage
when engine is OFF and also check 48 VDC
logic relay and circuit wiring
If 48 VDC battery voltage is correct when en-
gine is OFF but drops when engine is ON, con-
sider that motor/generator is faulty
Check logic power connection to #3 cutting
unit
If this fault is displayed for more than one
cutting unit, check 48 VDC battery voltage
when engine is OFF and also check 48 VDC
logic relay and circuit wiring
If 48 VDC battery voltage is correct when en-
gine is OFF but drops when engine is ON, con-
sider that motor/generator is faulty
Electrical System