Faults Indicated On The Handset Display - Hettich LegaDrive Operating And Installation Instructions

8. Troubleshooting
Display not working (buttons working)
Possible cause
Cable is faulty Change the handset
Display is faulty Change the handset
Microcontroller is Change the handset
faulty
Handset is faulty Change the handset
Buttons not working (display working)
Possible cause
Cable is faulty Change the handset
Handset is faulty Change the handset
Buttons were Unplug the handset and then plug it back
pressed on startup in again without touching the control
panel
Control unit or handset not working (neither display nor but-
tons)
Possible cause
Cable is not Plug the cable into the socket intended
plugged in. for it and marked HS
Cable is not Plug the cable into the socket intended
plugged in properly. for it and marked HS
Poor plug contact Unplug the cable and then plug it back in
properly
Cable faulty Change the handset
Handset is faulty Change the handset
Poor plug contact Properly plug in the lifting column cable,
the power supply cable and the handset
cable.
Remote handset a) No battery in the remote handset or
faulty battery empty.
(Refer to section 6.2.2.2 "Replacing the
battery").
b) Remote handset not programmed.
(Refer to section 6.2.2.1 "Programming").

8.2.2 Faults indicated on the handset display

Remedy
Remedy
Remedy
The display shows HOT.
Possible cause
The control unit is protec-
ted from
overheating. Overheating
has activated this
overheating protection.
The display shows four dashes.
Possible cause
The display handset was
connected to the control
unit while the control unit
was connected to mains
power voltage.
The display shows E + a fault number.
Possible cause
An internal fault has oc-
curred in the control unit.
Remedy
Wait for the control unit to cool
down and the HOT message to go
out on the display. The control unit
is now ready for operation again.
Remedy
Disconnect the power cable from
the mains power voltage. Leave
the control unit voltage-free for
approx. 10 seconds. Reconnect the
power cable to the mains power.
Remedy
Proceed as described in the fol-
lowing fault list.
45