Holder 4.74 manual 147

C 4.74	Operating instructions
		Troubleshooting guide
Problem	Cause	Remedy
Position control not always working	Potentiometer ranges shifted	New calibration with Opus
	Actuator for angle sensor out of	Readjust and recalibrate angle sensor
	adjustment
Directional control valve leaky	Foreign particles in seat valve	Remove, clean or replace valve
		cartridge
No pressure build-up	Slide valve in input plate stuck	Remove, clean slide valve or replace
	(foreign particles)	plate
Strong oil flow fluctuation in flow	Lack of oil	Higher RPM, reduce demand of 2nd
divider I or oil flow too low		load

Troubleshooting is also possible with Opus or the PC soft- ware in the menu

•Keyboard Check: Keyboard buttons.

•Output functions XO...Y3: Check if box provides current for valves.

•Rear power lift position limiter: Functions of lift posi- tion control.

•Cushioning device: Functions of hydraulic implement cushioning

•Desired value channel.

•FCE1: Joystick functions.

•Diagnosis of master inputs.

•Diagnosis of BKN nodes.

Use the circuit diagrams and wiring diagrams.

Also refer to the Bucher Hydraulics operating instructions.

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