NAVITAS TAC 2 Installation And Service Manual

INSTALLATION/ SERVICE MANUAL
INSTALLATION/ SERVICE MANUAL
33
34
FLASH
CODES
FLASH CODE
MESSAGE
DESCRIPTION SOLUTION HOW TO CHECK
3 - 1 Battery Under
Voltage
Batteries are
empty or too low.
• Recharge batteries
• Check for bad or
damaged batteries.
• Check battery cables
are not loose or
damaged.
• Check solenoid
• Use a battery load tester to verify
battery condition after charging.
• Connect volt meter batteries. (Use
alligator clips). Measure the voltage
while driving to see if the voltage drops.
• Connect Volt meter to the controller if
the voltage drops at the controller and
not at the battery then the solenoid may
be bad.
3 - 2 Battery Over
Voltage
Batteries are over
charged or not
excepting any
more regenerative
currents
• Check for bad or
damaged Batteries.
• Check Battery Cables
are not loose or
damaged.
• Check Solenoid
• Use a battery load tester to verify
battery condition after charging.
• Connect volt meter batteries. (Use
alligator clips). Measure the voltage
while driving to see if the voltage rises.
• Connect volt meter to the controller if
the voltage rises at the controller and
not at the battery then the solenoid may
be bad.
3 - 3 Motor Over
Current
Motor current has
risen above the
maximum motor
current parameter.
• Check Motor U,V,W
cables are not
shorted to ground
See diode chart below
• The diagnostics page of the App will
give you readings for the U phase
voltage, V phase voltage, W phase
voltage
• The phases should read around half the
battery voltage.
• Disconnect phases at controller and
check readings again
4-5 Over Current
Fault
Motor current
has exceeded
controller current
limit.
• Release throttle and
reapply to drive
• Error code will clear when key is o and
in Tow.
FLASH
CODES
FLASH CODE
MESSAGE
DESCRIPTION SOLUTION HOW TO CHECK
4-7 Power Stage
Fault
Controller has
failed power check
on startup
• Check motor
connections
• Turn Key o, place in Tow.
• Disconnect U,V,W from controller.
• Place in Run, turn on Key.
• Check if error message now shows
that motor is not connected. If error
continues to show, contact Navitas
Support. Please take screenshot of
error message to provide to Navitas
Support
4-8 Encoder A
input Fault
Speed input A is
not changing when
Motor Current is
Applied
• Check speed sensor • With Key o and vehicle in Tow,
disconnect speed encoder harness from
motor. (4 pin connector at motor)
• Place vehicle in Run and turn Key on.
• Using a volt meter, measure the voltage
at each of the pins. You should read 5V,
3V, 3V, 0V on the wires.
• Reconnect to controller with app. Go to
Diagnostics page and look for Encoder
A & B inputs.
• With a piece of wire or a paperclip, short
the 3V wires to the 0V wire and check
on the app if the input has gone from
high to low. If it has, the inputs at the
controller are working and the sensor
may be at fault.
4-9 Encoder B
input Fault
Speed input A is
not changing when
Motor Current is
Applied
• Check speed sensor
4-12 Encoder Rate
Limit Fault
Speed input A is
not changing when
Motor Current is
Applied
• Check speed sensor • Check Encoder wires and connectors
for damage.
• Remove Encoder from motor, check for
debris and reset Encoder.
• Contact Technical Support for further
testing.

NAVITAS TAC 2 Specifications

General

Brand	NAVITAS
Model	TAC 2
Category	Controller
Language	English