16troubleshootingalarm/fault display solutionControl Unit does notoperate; no display lightsilluminateThe Control Unit maynot be attached to apower source or a fusemay need replacing1. Check the Control Unit is connected to mainspower outlet with the correct voltage.2. Check the Control Unit is switched on. Switch offand unplug the unit before restarting.3. Check the Control Unit fuse (1 AMP) – fuse can bereleased using a screwdriver to push and turn.(see page 20)WARNING: Do not try to open the ControlUnit. Opening the unit could cause personal injury orequipment damage.Alarm LED Initial failure 1. Reset the alarm – turn off Power and press theAlarm Mute button.2. Check all air hoses along the inside of the Mattress– each should be firmly connected. Check each aircell is securely attached to its connecting air pipe.3. Check all cells, pipes and hoses for any air leakage.4. Switch on Power.+ audible alarmAlarm LED Pressure too low 1. Reset the alarm – turn off Power and press theAlarm Mute button.2. Check the CPR tag is intact, ensuring the sealingplugs are firmly fitted to the connectors.3. Check all air hoses along the inside of the Mattress– each should be firmly connected. Check each aircell is securely attached to its connecting air hose.4. Check all cells, pipes and hoses for any air leakage.5. Check that the air filter cover is correctly securedand the air filter is clean.6. Switch on Power.+ audible alarm