Transportation; Alerts - DHG Dyna-Form Mercury Advance Service Manual

SERVICE MANUAL

7. Transportation

To change the location of the mattress, remove the Umbilical Cord and allow the mattress to return to
its Static Mattress form. Switch off the Control Unit using the on/off switch and disconnect the electrical
supply cable from the mains socket. The mattress can now be moved to a new location where it must
immediately be reconnected to the mains electrical supply and the Control Unit switched back on. Once
the Mattress has been refilled, the 'Alternating' mode will automatically revert back to the Low setting and
should be reselected to High should this be desired by the clinician.
Warning: The Mattress will not 'alternate' when disconnected from Control Unit and /or the mains
electrical. Also, refer to environmental conditions section at rear of this manual.

8. Alerts

Alert conditions are indicated by a flashing red display accompanied by an Audible Alert.
In each case the user should respond by turning the Control Unit's switch off and investigating the cause.
8.1 High Pressure Alert
This condition could be caused, for example by a kinked Umbilical Hose or visitors, and others, sitting
suddenly on the Mattress.
8.2 Low Pressure Alert
This condition could be caused, for example, by incorrect fitting of the air inlet connector, opening of the
CPR Valve or a leak in the Mattress due to a cut or puncture.
8.3 Mains Failure Alert or Other
This condition may be caused, for example if mains power is lost or failure of the pressure sensor or
pump.
8.4 Alternating Mode Failure (no alternation)
This will be indicated by a visual indicator LED on A and B and an Audible Alert.
1. Reset the Alert – turn off Power and press the Audible Alert mute button.
2. Disconnect the air hoses to reduce pressure – reconnect when pressure has decreased.
8.5 Initialising Failure
This will be indicated by a visual indicator LED on A, B and C and an Audible Alert.
1. Press the Audible Alert mute button to silence the Audible Alert.
2. Check the power cable is firmly plugged into the mains outlet and the Control Unit; and check the
mains power is switched on.
3. Check the Control Unit fuse (1 AMP) – fuses can be released using a screwdriver to push and turn.
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