Husqvarna PP 455 E Bedienungsanweisung Seite 16

4.1 Temperature sensor for hydraulic oil
A temperature sensor is fitted by the water coolant duct. The
sensor ensures that the water coolant is connected to the
hydraulic unit. The water coolant cools the hydraulic oil.
When the temperature sensor is on, the control system
continuously reads the temperature.
IMPORTANT! The hydraulic unit can be damaged, if the
temperature sensor is switched off.
Turn on/ turn off the temperature sensor:
• Press OK when the part menu is shown.
The display shows: TEMP. SENSOR FOR HYDR. OIL and
ON or OFF.
• Press OK to switch between ON and OFF.
• Press the down arrow to continue to the next part menu.
4.2 Voltage sensor
A voltage sensor is connected to each phase, i.e. in total three
sensors. These measure the phase voltage to hydraulic unit.
Should the voltage be 10 % less than the nominal voltage, the
hydraulic unit stops.
IMPORTANT! The electric motor risks overheating due to a
too low voltage, if the voltage sensors are switched off.
Turn on / turn off the voltage sensors:
• Press OK when the part menu is shown.
The display shows: VOLTAGE SENSOR and ON or OFF.
• Press OK to switch between ON and OFF.
• Press the down arrow to continue to the next part menu.
4.3 Pressure sensor for hydraulic pressure
The pressure sensor measures the hydraulic pressure to the
blade.
IMPORTANT! The hydraulic unit's control system switches
off, if the pressure sensor is switched off. The hydraulic
system may then be difficult to control with a high load.
Turn on/ turn off the pressure sensor:
• Press OK when the part menu is shown.
The display shows: PRESSURE SENSOR FOR
HYDRAULIC PRESSURE and ON or OFF.
• Press OK to switch between ON and OFF.
• Press the down arrow to continue to the next part menu.
4.4 Calibrate pressure sensor for hydraulics
The pressure sensor that measures the oil pressure for blade
rotation is possible to calibrate.
The pressure sensor must be calibrated according to the
order zero point and maximum point.
16 –
English
SETTINGS AND ADJUSTMENTS
To calibrate the zero point:
1 Connect the incoming power cable to 63 A.
2 Connect an oil pressure reducing valve with a pressure
gauge to the blade rotation's hydraulic couplings.
3 Select the sub-menu Sensor on/off calibrate" from the
Settings" menu.
4 Scroll using the arrow keys and press OK when Calibrate
pressure sensor for hydraulics" is shown.
5 Press OK again when the display shows CALIBRATE
ZERO POINT.
6 Start the hydraulic unit.
7 Adjust the oil pressure reduction valve to 0 bar.
8 Press arrow up/down until the value for the oil pressure is
shown as 0 bar, i.e. the same value as on the pressure
gauge on the oil pressure reduction valve.
9 Press OK to execute calibration.
To calibrate the maximum point:
IMPORTANT! Calibrate the zero point (see previous page)
before the maximum point. This is so you do not miss to
start the hydraulic unit.
1 Select the sub-menu Sensor on/off calibrate" from the
Settings" menu.
2 Scroll using the arrow keys and press OK when Calibrate
pressure sensor for hydraulics" is shown.
3 Press OK again when the display shows CALIBRATE
MAX POINT.
4 Adjust the oil pressure reduction valve to 215 bar.
5 Press arrow up/down until the value for the oil pressure is
shown as 215 bar, i.e. the same value as on the pressure
gauge on the oil pressure reduction valve.
6 Press OK to execute calibration.
7 Press the down arrow to continue to the next part menu.
4.5 Calibrate voltage sensor
To calibrate the voltage sensor:
1 Scroll using the arrow keys and press OK when Calibrate
voltage sensor" is shown.
2 Select the voltage sensor (1-3) with the arrow keys and
press OK.
3 Connect a voltmeter between the phase and the earth on
the sensor to be calibrated.
4 Press arrow up/down until the defined voltage value on
the display is the same as the value on the voltmeter.
5 Press OK to execute calibration.
6 Press the down arrow to continue to the next part menu.