A2. Ascent; A2.1. Start-Up (The Lift Does Not Start) - MP sava3 Technical Manual

A2. Ascent

A2.1. Start-up (the lift does not start)

- Shut-off Valve. Check that the shut-off valve is open. Move the lever in the direction shown on the picture in order to open it.
- Electric motor.
- Motor voltage and mains voltage. Delta connection, star connection.
If the mains voltage does not coincide with the motor voltage, the following event may occur while connecting:
- Delta connection instead of star connection  Overcurrent, a possible short-circuit in the windings.
- Star connection instead of delta connection  Motor turning at a slow speed.
- Changed phases.
The motor turns in the opposite direction. The absorption pump emits a low noise  Change one of the power phases.
- Thermistors (110ºC).
They must not be maintained with voltages higher than 2.5 V  There may be a short circuit in the windings.
- Overpressure valve regulator (screw nº1)
- Check that the lift is not carrying a load greater than the load specified. If the load is correct, check that oil is not flowing through the pressure limiter return
pipe; if this is the case, it will be necessary to correctly adjust the aforementioned valve (follow that shown in MTHDEQHMP).
- See paragraph 2.2. for an explanatory image.
- Thermal probe. Arranged as a support for the electric motor. If the thermal probe is open  leave the oil to cool down.
- Star-delta start-up electrovalve (YS)
- The coil of this electrovalve is not connected correctly.
 Check the connection in the connector and in the terminal of the control panel.
- Acceleration in ascent regulator (screw nº 2)
- The regulator screw may be completely tightened for which reason the oil may be returned to
the tank via the discharge hose.
 Turn the screw until it is untightened and adjust according to the product technical dossier
MTMECsava3.
- Take out the regulator and check that the filter and the pressure intake port for the regulator
are not blocked.
V700 - 11/2017
Shut-off valve opening
27/40
MP sava3 Hidraulic Power Unit 1 ¼" 1 ½"
Pressure hole
MTMECMPsava3_700_EN
Filter