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4
Service
All work inside the MXHF should be performed by a qualified technician. La Marche is not responsible for any
damages caused by an unqualified technician.
4.1
Maintenance
The charger, provided it’s installed correctly in an appropriate location and is not abused, will require little
maintenance. The only requirement is to monitor the air inlet filter at the front of the charger for dirt build up.
The power modules internal to the charger housing require a good supply of cooling air during the charge cycle
and a blocked filter will affect the cooling ability. A blocked filter could lead to the charger turning down its
maximum output to prevent overheating of the power modules. An extremely blocked filter could cause longer
charge times, inability to charge the battery correctly
or premature wear-out of the power modules.
The recommended service interval is 12 months but this will vary depending on the location of the charger and
the number of charge cycles performed. The fans in the power modules only run during charging and are
speed controlled. If the charger output is small, the fans will only be turning slowly. At full power there is a
considerable requirement for cooling air and the fans will be working hard with considerable hot air being
exhausted from the rear of the charger. The exhaust air from the rear of the charger should never be
restricted. The intermittent nature of the fans results in a long fan service with no scheduled replacement of
fans being required.
The filter material is an electrostatic polypropylene type that is easy to clean with compressed air to blow out
any dirt and dust buildup. Before attempting to clean the filter it is necessary to remove it from the housing by
unscrewing the 2x captive screws and unhinging the filter from the housing. The electrostatic filters provide a
good compromise between filtering and clogging, but a small quantity of dust will enter the power modules
during normal operation. A small quantity of dust in the power modules will generally not cause problems,
however excessive build ups or where the material ingested is corrosive, conductive or wet will cause issues,
resulting in premature “wear-out” of the power modules.
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