Diagnostics; Status Lights - Maxwell ULTRA 31/1800 Manual De Instalación Y Manual De Usuario

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Diagnostics

The ESM includes two Light Emitting Diodes (LEDs) that display status of the unit when the Push-to-Test
button is pressed. To activate the LEDs, simply press and release the Push-to-Test button on the top of the
ESM. The red and green LEDs will illuminate and/or flash for 10 seconds as shown in the following diagram
to display the status of the ESM. Holding the Push-to-Test button down for 12 seconds will reset the internal
computer. Note that the LEDs are only active for 10 seconds when the button is pressed, and then they
automatically turn off. The ESM must be connected in parallel to a 12 Volt battery for the status button and
LEDs to function.

Status Lights

Green LED
Lit Solid
Flashing
Not Lit
Not Lit
Flashing
Fault Class Descriptions:
There are six different fault classes incorporated in the ESM.
diagnostic codes help customer service personnel diagnose any problems with the ESM.
Fault Green
Class LED
1 Green Off
2 Green Off
Green
3
Flashing
Green
4
Flashing
Green
Flashing
5
or
Green Off
6 Off
Normal Operating Conditions: The ESM LEDs will display two types of normal status:
1. A flashing Green LED indicates the ESM is charging, and may or may not have sufficient power to
start the vehicle. The initial charge cycle may take up to 30 minutes; subsequent charge cycles may
take up to 15 minutes.
2. A solid Green LED indicates the ESM is charged and ready to start the vehicle.
Abnormal Fault Conditions:
Refer to the ESM Troubleshooting Flow Diagram below.
Installation Guide and User Manual – 12V ESM
Document No.: 1017462.7 © 2012, 2013, 2014, 2015 Maxwell Technologies, Inc.
Red LED Meaning
Not Lit Ready to crank
Not Lit Charging: WAIT 15 minutes
Flashing Stuck pushbutton
Lit Solid Internal error – push test pushbutton for 10 sec.
Lit Solid Refer to manual
Red LED Description / Example
Red Stuck or jammed Push-to-Test
Flashing Button.
Internal electronics errors and/or
Red On internal temperature sensor errors.
Not serviceable by user.
Internal electronics failure and/or
Red On internal temperature sensor failure.
Not serviceable by user.
Battery under-voltage error, battery
over-voltage error, or over-
Red On
temperature error.
Internal electronics failure. Not
serviceable by user.
Red On
No response from unit and loss of
Off
functionality.
While some may be redundant these
Recovery
Recovers automatically when
fault condition is corrected.
Recovers with Manual Reset.
Recovers with Manual Reset.
Recovers automatically when
fault condition is corrected.
Allows continued use with
maximum 12V output.
Recovers with Manual Reset.
Allows continued use with
maximum 12V output.
Non-recoverable fault.
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