NAVITAS TAC 2 Error Code And Troubleshooting Guide

INSTALLATION/ SERVICE MANUAL
6
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 off, 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 off 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

NAVITAS TAC 2 Specifications

General

Brand	NAVITAS
Model	TAC 2
Category	Controller
Language	English