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8. Troubleshooting
8.2.2 Faults indicated on the handset display
The display shows
HOT
.
The display shows four dashes.
The display shows
E + a fault number
.
Possible cause
Remedy
The display handset was
connected to the control
unit while the control unit
was connected to mains
power voltage.
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.
Display not working (buttons working)
Buttons not working (display working)
Control unit or handset not working (neither display nor but-
tons)
Possible cause
Remedy
Cable is faulty
Change the handset
Display is faulty
Change the handset
Microcontroller is
faulty
Change the handset
Handset is faulty
Change the handset
Possible cause
Remedy
Cable is faulty
Change the handset
Handset is faulty
Change the handset
Buttons were
pressed on startup
Unplug the handset and then plug it back
in again without touching the control
panel
Possible cause
Remedy
Cable is not
plugged in.
Plug the cable into the socket intended
for it and marked HS
Cable is not
plugged in properly.
Plug the cable into the socket intended
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
faulty
a) No battery in the remote handset or
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”).
Possible cause
Remedy
An internal fault has oc-
curred in the control unit.
Proceed as described in the fol-
lowing fault list.
Possible cause
Remedy
The control unit is protec-
ted from
overheating. Overheating
has activated this
overheating protection.
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.