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11. Charging power supply
The battery charger is suitable for an input voltage of between 100V and 240V. The
output voltage is 33 V=. The charging current is 1 A.
There are different diagnostic codes if the lift requires charge
Code 1 and 7: When the battery voltage is very low (maybe down to 10%capacity left
in batteries), this fault code will appear. When the lift docks on to charge contacts, the
lift will not drive off the contacts. 1 will flash. Lift will only drive off if battery voltage
has recovered approximately three quarter capacity. Another way of driving off the
contacts is if lift is powered “off” then back “on” but as soon as lift docks on contacts,
process will repeat again. This fault code is linked to fault code 7 but the code 7 is not
usually seen as code 1 takes priority.
Code r: This code will occur when the lift is charging. If the power supply is
disconnected while the lift is charging, the r code will display. A fault with the 33V
power supply where the power supply cannot supply current to charge the batteries
will also show this code.
Code U: This code occurs when the lift has fully charged the batteries and is in
sleeping mode. When the 33V power supply is disconnected, the U code will display.
Code d and H: This code appears if the batteries are low. The main relay on the
board is rated for 24VDC operation so the low voltage will give a false fault condition.
Software priority determines whether d or H are displayed.
Testing the power supply:
Connect the multimeter between the spade of the red wire and the ground. The
voltage raises until 29,5V=. After 5 minutes the voltage it’s 27.5 V=. Make a test ride,
if the voltage drops under 20V= there is a problem with the batteries or the power
supply.
