Service Manual

Fault
Number
Fault Title
Controller
Affected
Fault Condition/
Circuit
Description
Additional Notes
Service Actions
(Repair or replace any
worn or damaged parts)
28
All 48V CAN Bus
Devices Offline
Master TEC
All the devices on the
CAN bus are offline.
While this fault is active, the
engine goes to high idle and the
operator does not have control
of engine speed.
1) With the engine off, test the 48
Vdc battery system.
2) With the engine running, test
the 48 Vdc battery system.
3) Test the 48 Vdc logic relay and
the circuit wiring.
4) Test the 48 Vdc power to the
logic relay.
5) Test the power to the CAN bus
isolation module.
6) Test the CAN bus wiring to the
isolation module.
7) Replace the CAN bus isolation
module.
29
48V Battery Low
Voltage
Master TEC
All six 48V devices are
reporting an
Undervoltage fault.
The cutting reel motors
submit this fault at 32
volts and the M/G
reports this fault at 36
volts. As a result, the
bus voltage must be
below 32 volts for the
fault to occur
The bus system includes the
motor/generator and all 5
cutting reel motors.
1) With the engine running, test
the 48 Vdc battery system.
2) With the engine off, test the 48
Vdc battery system.
3) Replace the main 48 Vdc
contactor.
30
48V Bus High
Voltage
Master TEC
All six 48V devices are
reporting an
Overvoltage fault. The
cutting reel motors
submit this fault at 67.5
volts and the M/G
reports this fault at 65
volts. As a result, the
bus voltage must be
above 67.5 volts for the
fault to occur
This fault reports when all 6
individual 48 Vdc overvoltage
faults are active at the same
time.
1) With the engine off, test the 48
Vdc battery system.
2) With the engine running, test
the 48 Vdc battery system.
3) Replace the motor/generator
controller.
Reelmaster 5010-H Diagnostic Fault Code Quick Reference Table Page 5 of 38