Remove rear-lid (NOT front-lid). There are four clips holding the lid to the case. These are situated 25mm from each
corner. To remove the rear-lid, insert the tip of a screw-driver or round ended knife into the gap between the case and the
lid and twist on each corner. After removing the lid the tank is accessible.
Remove the tank lid by taking out the fixings screws. Lift out the baffle plates on the inside of the tank (note the position
of these plates so that you can replace them correctly). Wipe clean the level sensing probes using a non-metallic scourer.
It is important to ensure that you also clean the white insulators. Reassemble and switch the boiler back on. Leave for 15
minutes after
“BOILER READY”
displays before using the boiler.
Critical Warnings (2):
In the event of serious malfunction, the red spanner in the display will illuminate together with a message
“CALL
SUPPLIER”
alternating with one of the following messages.
“THERMISTOR O/C”
- The temperature sensor has been disconnected or is faulty. Consult with your supplier or phone
Instanta service department on 01704 502911 (or if this number is engaged 01704 501114).
“HEAT/THERM FAIL”
- This means that either the overflow or element safety cut out has activated or the element has
failed. Switch the boiler off at the mains and switch back on in 2 minutes. If the overflow cut has operated, the boiler will
reset and work as normal. If the element cut out has activated or the element has failed, the message will recur in around
1 hour. In this instance phone your supplier or phone Instanta service department on 01704 502911 (or if this number is
engaged 01704 501114).
“OVERFILL” -
This means that the boiler has sensed water on the fifth level sensor. If you have ignored a previous
“CLEAN PROBES”
message simply clean the probes as above. If this does not resolve the fault, the boiler has
overfilled. This may have been caused by a faulty water inlet valve or very high or low incoming water pressure. Consult
with your supplier or phone Instanta service department on 01704 502911 (or if this number is engaged 01704 501114).
10.0 - CLEANING
The external surfaces of the water font can be kept clean by wiping with a damp cloth. Do not use abrasive material on the
outer surface of the machine.
11.0 - MAINTENANCE
The boiler should be periodically checked for scale build-up. The frequency depends upon the hardness of the water and
whether or not an effective scale reducer is fitted.
Apart from scale removal no regular maintenance should be required.
Spare parts and accessories are available from Instanta Limited - Tel: 01704 501114 and ask for Spares.
DESCALING
To de-scale your machine, first disconnect the machine from the power supply and allow to cool down.
Disconnect water tube and electrical plug/lead from water font, and slide under-counter unit forward to allow easier access
to lid/tank.
Remove rear-lid (NOT front-lid). There are four clips holding the lid to the case. These are situated 25mm from each
corner. To remove the rear-lid, insert the tip of a screw-driver or round ended knife into the gap between the case and the
lid and twist each corner. After removing the lid the tank is accessible.
Remove the tank lid by taking out four fixing screws (six on UCD47 models). Lift out the baffle plates on the inside of the
tank. Empty the water from the tank.
Remove as much scale as possible by hand. Any scale which is difficult to remove can be dissolved by using a solution of
Renegite de-scaler. Wipe clean the level sensing probes.
Ensure all traces of de-scaler are removed before replacing tank-lid and using the boiler again.
Rather than frequently de-scaling the machine it may be preferable to install an effective scale reducer or WRAS approved
water softener. This will reduce the frequency of de-scaling but will not remove scale completely in some areas.
