4.4 MAINTENANCE
DOC01-V6ULB+ 41
Troubleshooting after a fatal error
When the control box is in fatal error mode, a fatal error beep will be present every time
a button is pressed to alert the user to the condition. In addition, all LEDs will start
flashing when the system is in fatal error. Each control box function reacts to fatal errors
in a specific way. Here are the possible types of error:
1. Positioner error on actuators: occurs when the control box expects to see
positioning pulses when an actuator moves but does not see these pulses.
2. Motor output error: occurs when a power request is generated but there is no
command to go with it. This error is generated for safety reasons, so that no
involuntary movement occurs on the bed without a specific code having been
generated (pressing a key generates a unique code).
3. Missing actuator(s) error: occurs when a function is called, but not all the
actuators required for the function are present.
An unrecoverable error must be cleared by simultaneously pressing the bed height
up/down buttons on the nurse control at the foot of the bed or on the removable control
(hand control) for 5 seconds. The fatal error reset beeps (10) are heard while this is being
done. When the beeps stop, the reset is complete.
An unrecoverable error should not cause the actuators to lose their stored position. It is
up to the user resetting the fatal error to determine whether the system is in a safe
position. Raise the bed to the highest position to obtain the correct calibration.
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