MP sava3 Hidraulic Power Unit
1 ¼” 1 ½”
V700 - 11/2017
23/40
MTMECMPsava3_700_EN
7.3. Failure simulation of the VD valve (Bypass valve operated by the YS Electrovalve)
The test consists of checking that the car stops at level in case of failure of the VD.
Proceed as described hereafter:
1. When the car is full-loaded, make a descent call
to the lowest floor of the run.
2. During the trip, with a punch, tighten completely
the actuator located in top of the YS
Electrovalve (golden colour, see the previous picture):
this operation opens the VD and does not allow its closing.
3. The test is completed when the LED of sensor SVD
monitoring the VB valve closing is lit.
4. The test shall confirm that the distance of the uncontrolled
movement at the destination landing does not exceed the
value stated in clause 9.13.5 of the Standard EN 81-2+A3 or
in clause 5.6.7.5 of the Standard EN 81-20.
7.4. Test of the monitoring system
With the car at level and the controller switched on, unplug any SVD or SVC magnetic sensor.
1.
Check that the controller displays the failure corresponding to the non-detection
by the position sensor of the valve closure, after the lift reached the floor.
With the lift functioning and before it arrives at level, unplug any SVD or SVC magnetic sensor.
2.
Check that the controller displays the failure corresponding to the non-detection
by the position sensor of the valve closure, after the lift reached the floor.
3.
Check the lift comes back to its operational status when the sensors recover the proper reading of the valve closing position after you
plugged them both back on.
The test is over.
Note:
If the installation has only two stops, there is no need to achieve the point 7.2.2. because the buffer will prevent uncontrolled movements, according to the
conditions described in the EN 81-2+A3 and EN 81-20 standard.
Position Sensor
Descent Valve
SVD
Position Sensor
Bypass Valve
SVC
