MDE142E0
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06/04/04
14. MAINTENANCE
14.1. Standard maintenance
Under normal operating
condition
, the EHAS is maintenance free system. No formal actuator maintenance is
required. Although visual inspection for oil leakage or external visible damages is recommended every two
years.
14.2. Special maintenance
The system is provided with different counters, as already mentioned on par.13.4, to records operations, alarms
and warning in order to provide information to assist in the maintenance program and trouble-shooting.
The utilisation rate (%) is used to establish the special maintenance request. The utilisation rate is calculated on
the base of the real operational time in function of the duty rate.
In case of maintenance request warning, should be necessary to verify the cylinder seals, the solenoid valve seals
and the wearing of the solenoid valve mechanical components.
15. TROUBLE-SHOOTING
15.1. The display is off when the actuator is powered
In this case no information can be obtained from the local display. It need to proceed as follows:
Check main voltage supply
If the main voltage is OK, the trouble is due to the failure of electronic power card or to the supply
transformer, that should be check and replaced.
