Service Manual

Fault
Number
Fault Title
Controller
Affected
Fault Condition/
Circuit
Description
Additional Notes
Service Actions
(Repair or replace any
worn or damaged parts)
98
48V Bus Overvolt—
CRM 5
Cutting Reel
Motor Controller
Cutting reel motor has
detected 67.5 Vdc or
more on the 48 Vdc
bus.
• This fault can also occur if
the TEC-5002 loses
communication with the
motor/generator and reverts
to limp mode.
• When the TEC-5002 loses
communication, it loses
engine speed control, and
the mechanical governor
limits engine speed to 3,200
rpm.
1) Swap cutting reel motors
between cutting units. Replace
the motor if the fault moves to
the new position.
2) Inspect main harness
connectors P44 and P45 at
cutting reel motor 5 for damage,
corrosion, debris, and proper
alignment of the pins inside the
connectors.
3) Test connectors P44 and P45
for 48V with the engine off and
the key in the ON position.
4) Test the power and ground
wiring resistance in main
harness connectors P44 and
P45.
99
48V Bus Overvolt—
M/G
Motor/Generator
Controller
The 48 Vdc bus circuit
has exceeded an over-
voltage set point (65
Vdc).
• This fault can also occur if
the TEC-5002 loses
communication with the
motor/generator and reverts
to limp mode.
• When the TEC-5002 loses
communication, it loses
engine speed control, and
the mechanical governor
limits engine speed to 3,200
rpm.
• If more than 1 cutting reel
motor and the
motor/generator are
reporting a 48V Bus
Overvolt, the problem is
more likely to be with the 48
Vdc bus voltage. Perform
the Recommended Service
Actions for fault 30.
1) With the engine off, check the
48 Vdc battery system across
the main contactor. It should be
46-54 Vdc.
2) With the engine running, check
the 48 Vdc battery system. It
should be 46-58 Vdc.
3) Replace the motor/generator
controller if the 48 Vdc battery
system tests fail.
Reelmaster 5010-H Diagnostic Fault Code Quick Reference Table Page 30 of 38