Table des Matières
Publicité
§5.1 - HTL moves at normal speed, without any control switch being operated.
• Button or switch of the control unit doesn't return to the neutral 0-position.
• Button or switch does return to the 0-position, but one of the electrical contacts behind the
switch is stuck or burnt.
• Short circuit between the various wires in one of the electrical cables.
§5.2 - HTL doesn't react on any of the functions OUT / UP / DOWN / IN
• Isolator switch for the HTL in the vehicle cabin is not switched on.
• One of the vehicle interlocks (on doors etc...) is not functional.
• Main battery fuse is out of order (corroded, heated and burnt by bad connection,...).
• Power relay Rbat in the power pack is out of order.
• 15A fuse or automatic fuse in the power pack is defective.
• The power pack is not properly earthed.
• Defect in the cable boom & loop from the power pack to the lift frame, travelling in / out at
the bottom of the cassette.
§5.3 - Symptoms of weak batteries or damaged current supply.
• The low-AMP functions (LOWER) are working, but the high-AMP movements (LIFT, SLIDE-
IN, SLIDE-OUT) are failing.
• The electric motor M still runs, but audibly slower and laboriously.
• The power relay Rbat and starter solenoid R switches on, but the electric motor M doesn't
react.
• The starter solenoid R quickly switches on and off (doorbelling).
• Nothing at all happens.
...
DHOLLANDIA
Annex to section 5 ● DH-CH100...series : CHECKLIST FOR TROUBLE SHOOTING
Typically, a malfunction at normal speed is usually caused by an electrical failure.
Determine this by isolating the power source from the solenoid concerned, e.g. remove the solenoid from the elec-
trovalve. (when this action doesn't end the malfunction, the cause is not electrical: e.g.. dirt in the cartridge, damaged
sealing;...).
Measure the voltage at the electrical distribution block in the power pack, and repair the fault.
Switch on the isolator switch for the HTL in the vehicle cabin. Ensure the emergency cut-off switch is not engaged.
Verify the main battery fuse, and repair or replace if necessary.
Verify if you measure 24V on the incoming pole of the power relay Rbat in the power pack. If not, check the power cir-
cuit from the vehicle batteries to this power relay Rbat. If yes, check if the power relay passes 24V to the outgoing pole,
when activated.
Verify the 15A fuse and automatic fuse in the power pack, and repair or replace if necessary.
Establish a direct (-) earth link to the HTL batteries, and verify if the power pack is properly earthed: none of the electric
valves, starter solenoid, electric motor can work without a good earth link.
Remove the cover of the power pack, and measure the voltage at the incoming pole of the starter solenoid R, when the
system is under strain (push the function LIFT).
If you measure 24V, check the working of the starter solenoid R when pushing the function LIFT (you should measure
24V at the outgoing pole of the starter solenoid R); verify and measure the (+) battery cable to the electric motor M,
check the (-) earth link of the starter solenoid R and the (-) earth link of the electric motor M up to the vehicle batteries.
Also if you measure 24V on the multimeter, also check if there is sufficient Amp by using a test bulb. If the bulb doesn't
light, check for poor connection at the main battery fuse, and the whole (+) battery cable up to the power source.
If no 24V is measured at the incoming pole of the starter solenoid R, verify the (+) battery cable to the power relay Rbat,
and measure if the power relay Rbat itself passes through the current.
...
EN
B34
Publicité
Table des Matières
