ATLAS 38 of 44 User’s Manual
No iPM
LED’s are ON
in Charger
Chassis Unit
Continued
iPM Module
Connector or
Backplane
Connection Bad
1) Using the Web server interface, go to the dashboard page and look at
the iPM section and verify if the UIM is able to connect with them.
Each iPM is connected to the UIM via the backplane and should be
displayed on the dashboard.
2) If the iPM is not displayed on the dashboard, then remove the screws
holding the iPM in and pull the iPM out of the chassis. Inspect the
connector on the backplane chassis and also on the iPM. If no issues
are found, reinstall iPM making sure connector is fully engaged with
the backplane board.
3) On AC power up, the iPM LEDs should do a power up sequence with
LED changing from red to green. If this does not happen, then see
next possible cause.
1) If it has been determined that the above possible causes and actions
have not resolved the issue then, replace the iPM with the proper iPM
type for the charger system.
13.2. UIM Replacement Information
If for any reason a UIM assembly is needed to be replaced follow the procedure below to make sure the
replacement UIM is setup properly for your system and functioning properly.
1. Install the UIM assembly using the instructions provided with the service part.
2. If using the UIM rotary switches to control float voltage make sure switches are set for the desired
settings. If using web page UIM control then after AC is applied check all settings for proper setup.
3. With the proper voltage iPMs in the charger chassis apply AC power to the unit. Verify setting on
web page or on rotary switches.
4. The UIM assembly will connect with the iPMs and determine the proper Nominal DC Output Voltage
setting for the System Setting and adjust some charger settings based off of this information.
5. If the UIM assembly was factory set for a default of 12 volt nominal and being used in a 24 volt
nominal system the IPMs will be turned off on power up (iPM LEDs off).This will also happen if the
UIM assembly was setup for a 24 volt nominal system and now being used in a 12 volt nominal
system.
6. One of two methods will need to be used to allow the iPMs to be turned on. Either reboot the UIM
assemblies by removing all UIM power sources (AC and DC) or using the web page controls on the
dashboard go to Manual Control, Output Control and click on the Turn Output On. Charger output
should come on and iPM LEDs will come on.
7. With DC battery not connected you can check for proper float voltage at the charger terminal posts.
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