Problem Possible causes Rectification
box. (for detailed fault indica-
tion, see Fault messages on
control box » 137)
tem checked. Inform your oper-
ator about any necessary re-
pairs
Control unit not working:
Display screen
If available:
Locking LEDs on control box
flashing.
There is a problem with the
control unit. For safety rea-
sons, all functions are locked.
Troubleshooting
→ chapter Fault display on
LCD handset » 132 to Fault
messages on control
box » 137), then: RESET
control unit: preferably via
control box (→ chapter RE-
SET: Acknowledge faults on
control box » 140) ; alterna-
tively also via LCD handset (→
chapter RESET: Acknowledg-
ing faults on LCD hand-
set » 134). If problem recurs:
Have drive system checked. In-
form your operator about any
necessary repairs
Control unit not working:
Mains indicator light in the con-
trol unit is on, No display indi-
cations, No LED indications on
any control unit
OpenBus
®
power supply short-
circuit in the cables on the bed
for operating devices/signal
switches/sensors:
Cable squeezed/tightly stretch-
ed?
Short-circuit in plugs due to
highly stretched cables?
Disconnect OpenBus® plug
connections systematically one
after the other until a message
appears again on the display/
LED: The cable/component of
the last disconnected plug con-
nection was defective → re-
place
Then check the function of the
entire system: in case of further
malfunctions/fault messages,
continue troubleshooting (→
chapter RESET: Acknowledg-
ing faults on LCD hand-
set » 134 to RESET: Ac-
knowledge faults on control
box » 140).
Height adjustment and tilting
do not work; signal tone
sounds during adjustment
Control unit has “forgotten” the
drive positions
Initialising the control unit (→
chapter Initialising the con-
trol » 123)
Tab.4: Faults and their rectification
Troubleshooting
131 Instruction Manual
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