Service Manual

Fault
Number
Fault Title
Controller
Affected
Fault Condition/
Circuit
Description
Additional Notes
Service Actions
(Repair or replace any
worn or damaged parts)
86
48V Key Switch
High Voltage –
Cutting Reel Motor
5
Cutting Reel
Motor Controller
Cutting reel motor 5
has detected that the
48 Vdc logic voltage
has exceeded the high
voltage limit. This fault
causes the cutting reel
motor to be disabled.
• For this fault, the term “key
switch” refers to the 48 Vdc
logic power circuit, not to the
ignition switch.
• All 48 Vdc devices are
connected to the same 48
Vdc bus. If this is a system
issue, the TEC-5002
combines all 6 of the 48V
Key Switch Overvolt faults
(faults 82 through 87) into a
single fault (fault 31).
1) Swap cutting reel motors
between cutting units. If the
fault moves with the motor to
the new location, replace the
motor.
2) If the fault remains at cutting
reel unit 5, inspect connectors
P44 and P45 at cutting reel
motor 1 for damage, corrosion,
debris, and proper alignment of
the pins inside the connectors.
3) With the engine off and the key
on, check for 48 Vdc at
connector P45.
4) Test connectors P44 and P45
for continuity in the main
harness and repair any worn or
damaged parts.
87
48V Key Switch
Overvolt—M/G
Motor/Generator
The motor/generator
(M/G) controller has
detected that the logic
voltage has exceeded
the high voltage limit.
If only the motor/generator is
reporting a 48V Key Switch
Overvolt fault, the problem is
more likely to be with the 48
Vdc logic power connection to
the motor/generator.
1) With the engine shut off, test for
46–54 Vdc across the main
contactor.
2) With the engine running,
measure the voltage across the
contactor. The reading should
be 46–58 Vdc.
3) Replace the motor/generator
controller.
Reelmaster 5010-H Diagnostic Fault Code Quick Reference Table Page 24 of 38