Descale & Level probe cleaning procedure
Eco Boiler’s(T5, T10, T20, PB5, PB10, WMT5, etc.)
If the machine display’s
two red flashing
lights in sequence,
the below procedures should be performed to clean the
machine of scale/ mineral deposits to resume operation.
Cleaning water level probes: To fix the issue
two red flashing
lights.
If the boiler had a fault with two flashing red lights it will not turn on the heating
element as the low level probe (fig 3) cannot be detected due to scale or mineral
deposits on the probe. In order to resume operation the probes should be cleaned
back to metal using a scouring pad. i.e (Scotch brite pad). See Fig 3 below to identify
the probes. NOTE. To perform the descale procedure you may have to clean the low
level probe to resume operation.
Re-connect the mains water and turn on power, allow the machine to fill.
The machine should now stop at the low level probe and the heating element will
turn on. The heat fill cycle will continue until full.
A full descale should now be performed if scale is present in the boiler tank. See
below “Descale procedure”.
Descale procedure:
Isolate the machine from the power supply
Isolate the machine from the water supply
Allow the machine to cool
Remove the lower front panel to access the drain hose located on the lower left. To remove
the panel, remove the single retaining screw and prise the panel off using a flat head screw
driver. (Fig 1)
Drain the water from the machine using the drain hose.
Don’t forget to replace the drain
stop after use
Remove the top outer lid and the tank lid by removing the butterfly nuts. (Fig 2)
Gently remove as much scale as possible by hand using a scouring pad and water. Pay
particular attention to level probes, thermistor pocket and heating element. Be careful not
to damage any attachments. (Fig 3)
Use Scale Kleen, Marco p/n: 8000270, or a similar descaling product. Follow the instructions
of the product.
Note:
For best results pour the solution into the tank and allow the machine to heat. Allow the
descale solution to work for min 30 mins or as per the instructions of the brand been used.
Thoroughly clean and flush the machine at least 3 times before re-use.
