Crown Charger Module FS3-MP336-2

Warning: This test requires trained personnel only

Ensure that the LCD displays the start-up screen with mains power only applied to the Charger

Hold down the 'Up' and 'Down' buttons simultaneously for 10 seconds and ensure that the display changes to Test Mode Disabled

Press the 'Down' button to get to the Self-Test Disabled menu, then press the ENTER button to bring up the double headed arrow

Press the 'Up' button to enable Self Test and press the ENTER button. In the Cancel/Store menu press the 'Down' button to select Store

Press ENTER and in the Switch Test menu Toggle the On/Off switch. Ensure that the Red Charging lamp in illuminated and the display reads Red Led Test. Press the 'Up' button to pass the test

In Green Led Test menu ensure that the Green Ready lamp is illuminated and the display reads Green Led Test. Press the 'Up' button to pass the test

In the Buzzer Test menu ensure the buzzer is sounding, press the 'Up' button to pass the test. The next 3 tests are automated and require no user intervention

On completion of the test the LCD comes up as shown below, if a fault occurs the test will stop at the point of failure. Cycling the power returns the Charger to normal operation mode

Warning: This service requires trained personnel with PPE!

Air inlet filter free from dirt build up?

Charger Modules' airflow monitoring functional?

Charger Modules' cooling air supply healthy?

Note: A blocked filter will affect the cooling ability, reduced airflow could lead to the Charger protecting itself by backing off the output power and eventually shutting down.

Power modules backed off due to over temperature?

Note: Having the power modules back off due to over temperature will cause longer charge times and the inability to charge the battery correctly, units operated with blocked filters for extended periods will result in premature failure of the Charger Module cooling fans.

Number of charge cycles performed

1. The filter material is an electrostatic polypropylene type that is easily cleaned with compressed air or in extreme situations washed with clean soapy water

2. Before attempting to clean the filter it is necessary to remove it from the housing and taken to an appropriate place to be cleaned

3. If it is washed it must be left to dry fully before being refitted to the charger, drawing moist or wet air into the Charger Modules could cause failure of the modules

Accordingly when the filter is inspected, the front air inlet grills of the Charger Modules should be inspected for excessive signs of dirt build up. Should the Charger modules be covered in dust they should be removed from the housing for close inspection of any external signs of damage or corrosion. If it is just a build-up of dry dust the Charger Module should be cleaned out;

Warning: This procedure requires trained personnel with PPE!

Module taken to a suitable location for cleaning

Build-up brushed from the front grills without forcing it down into the fans

Length of the screw driver used to lock the fan impeller in place

Compressed air blower used to blow the dust through the module and out the back

Excessive pressure or close nozzle to the air inlet avoided

Internal area of the module cleaned with a gentle air flow

Does the Charger Module have considerable dust build up?

Housing blown out if Charger Module has considerable dust build up