Toro Reelmaster 5010- H Service Manual page 168

Fault Code
79 System voltage under 32 VDC has disabled #4
cutting unit
80 System voltage under 32 VDC has disabled #5
cutting unit
81 System voltage under 36 VDC has disabled
motor/generator
82 Logic voltage over 67.5 VDC has disabled #1
cutting unit
Electrical System
Fault Description
Page 5 - 28
Service Suggestions
Check logic power connection to #4 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 #5 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 motor/gener-
ator
If this fault is also displayed for cutting unit(s),
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
If multiple cutting units are reporting this fault,
check 48 VDC batteries and motor/generator
operation
If 48 VDC batteries are at correct voltage with
engine OFF, consider connections between
motor/generator and motor/generator con-
troller are loose or faulty
If TEC controller has lost communication with
motor/generator, engine speed will not be
controllable and this fault may be displayed
NOTE: If all 48 VDC components (motor/gen-
erator and cutting unit motors) generate this
fault, system fault 31 will be displayed on the
InfoCenter
Reelmaster 5010- H