MP sava3 Hidraulic Power Unit
1 ¼” 1 ½”
V700 - 11/2017
27/40
MTMECMPsava3_700_EN
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.
Pressure hole
Filter
Shut-off valve opening
