Dhollandia DH-CH100 Série Manuel De L'utilisateur page 98

§5.9 - The HTL doesn't reach floor height
• Wrong setting of the end-stops on the lift arms (CH100) or lift cylinders (CH101-102-103).
• Air in the lift circuit.
• The frame or cassette is twisted by overload or accident.
• The lift arm, or one of the articulation points is deformed by overload or accident.
• Insufficient quantity of oil in the reservoir.
§5.10 - The platform doesn't LOWER, the other functions work ok.
• Defect in the control unit (wander lead) or its wiring.
• The button / switch or electric contact are faulty, or the connection to one of the contacts is
loose.
• The incoming or outgoing connection to the electrical distribution block in the power pack is
faulty.
• Defect in the cable boom & loop from the power pack to the lift frame, travelling in / out at
the bottom of the cassette.
• The electric cable to the electrovalve D (LOWER) in the power pack is interrupted, or has a
bad contact.
• Solenoid D (LOWER) is defective. Or the cartridge of the valve is mechanically blocked.
• One of the braking valves on the cylinders or in the power pack is mechanically blocked (by
ice, dirt or by mechanical malfunction).
• One of the lift cylinders is blocked (piston rod bent by accident, badly greased,...).
DHOLLANDIA
EN
Verify & readjust the mechanical end stops on the lift cylinders / lift arms, to increase the working range of the LIFT func-
tion. Purge the lift circuit in order to remove all air from the oil fluid.
Verify the oil level in the power pack, and top-up oil if necessary. (Rest the platform in work position on the ground. The
maximum oil level reaches to 3cm below the fill-up inlet).
Verify and compare the fitting height and vehicle dimensions with the fitting instructions.
Verify the general condition of the HTL frame, lift arms and articulation points (pins & bearings). Check for deformation,
cracks, bending,...
Verify the electrical operation of the electrovalve D on the main valve block:
• with a magnetic tester (a solenoid generates a magnetic field when it is electrically activated);
• or open the safety valve manually via the emergency operation (if the valve is opened manually, and the platform
OPEN / LOWERS, the cause is electrical for sure).
!
If the valve is not energized, measure the current & earth circuit to that solenoid into the power pack, and repair.
If the electrical operation of all solenoids is correct, verify the cartridges of the valves for mechanical damage. Dismount
the braking valves on the cylinders and in the power pack to verify if they work ok.
Finally, verify the lift cylinders themselves for mechanical damage or bad greasing.
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