Nilfisk FOOD MH42 Mode D'emploi page 47

8.5. Trouble shooting and remedy
If errors or problems occur that are not described, contact the local service technician for assistance.
Fault
The unit does not • No supply voltage to the unit
start • Error message in display
• Flow switch out of adjustment
No pressure / • Insufficient water supply at unit
too low pressure • Filter is clogged
• The pump is leaking or making jarring
sounds
• Rinsing nozzle not installed
• No water supply
Insufficient foam • Product not suitable
creation • Insufficient air supply at unit
• Air pressure in mixing chamber too high
• Defect non-return valve for air
• Incorrect nozzle
• Leaking or blocked product non-return
valve
• System needs deliming
No foam • Product not suitable
creation • Air pressure in mixing chamber too high
• Defect non-return valve for air
• No air supply at unit
• Non-return valve blocked
• Nozzle of mixing chamber blocked
• Leaking or blocked product non-return
valve
• System needs deliming
No spray • Non-return valve blocked
sanitising • Nozzle of mixing chamber blocked
• Leaking or blocked product non-return
valve
• System needs deliming
Cause Remedy
• Make sure that power supply and inverter are
switched on.
• Read error and act accordingly
• Try to readjust flow switch
• Open water supply valve
• Clean the filter
• Call technician
• Place rinsing nozzle
• Ensure water supply
• Choose suitable product
• Provide sufficient air supply
• Adjust air pressure setting
• Replace non-return valve for air
• Place foam nozzle 50/200
• Clean or replace product non-return valve
• Delime the unit according to section 8.4.3.
• Choose suitable product
• Adjust air pressure setting
• Replace non-return valve for air
• Ensure air supply
• Clean or replace non-return valve
• Clean nozzle
• Clean or replace product non-return valve
• Delime the unit according to section 8.4.3.
• Clean or replace non-return valve
• Clean nozzle
• Clean or replace product non-return valve
• Delime the unit according to section 8.4.3.
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