Installation and Operation Guide
ED-DT318B
Drive Train Systems with Traction Control, Inverter/Controller, and Motor with 2 Speed Transmission
Status Signal
Time period
before
reacting
MCU ADC Calibration
Long
Problem
Section 7.3.3.7
MCU ADC Calibration
Problem History
Section 7.3.3.8
MCU Over Voltage Alarm
Immediate
Section 7.3.3.9
MCU Over Voltage Alarm
History
Section 7.3.3.10
MCU Over Speed Alarm
Section 7.3.3.11
MCU Over Speed Alarm
History
Section 7.3.3.12
MCU Over Voltage
Warning
Section 7.3.3.13
BC353060341319en-000101
Typical Vehicle Controller Unit (VCU) Expected
Action
Check engine light
X
Nothing, latched indication that MCU ADC
Calibration Problem has occurred. Provided for
trouble shooting.
Check engine light
Note 1: Regen switch will open and shifting will be
disabled
Note 2: Check for battery fuse blown, battery
contactor opened, or high voltage battery problem
X
Nothing, latched indication that MCU Over Voltage
Alarm has occurred. Provided for trouble shooting.
X
Customer dependent - over customer's limit or
Danfoss Power Solutions upper limit
X
Nothing, latched indication that MCU Over Speed
Alarm has occurred. Provided for trouble shooting.
X
Customer dependent - over customer's limit or
Danfoss Power Solutions upper limit
Record data and contact Danfoss Power Solutions.
Record data and contact Danfoss Power Solutions.
Verify DC bus operation.
Record data and contact Danfoss Power Solutions.
Verify DC bus operation.
Record data and contact Danfoss Power Solutions.
Verify VCU speed limit.
X
Verify DC bus operation.
Revision D
Recommended Service Action
© Danfoss | November 2020 | 167
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