robatherm AR3 - Troubleshooting

Page: 13
TROUBLESHOOTING
If the Boiling Water Unit does not function, check the following points before calling
for service.
#
SYMPTOM
POSSIBLE CAUSE
REMEDY
1.
The unit does not fill with
water
There is no power
supply
Check the electrical supply – Check
that the unit is plugged in.
There is no water supply
Check the water supply.
The inlet strainer is
blocked
Check the Inlet Strainer, clean or
replace.
Electronic Controller
failure
Test the electronic controller.
Solenoid Valve failure
Check resistance of the solenoid,
replace if broken.
The Filter is blocked (If
unit is supplied with an
inlet water filter)
Check the filter, replace if blocked
(see section 5E for re setting the
filter)
2.
The unit fills water to low
level and does not heat
Thermal cut-out has
tripped
Reset the thermal cut-out.
Heating element failure
If the heating element is properly
wired, then check its resistance.
Replace if broken.
Electronic Controller
failure
Test the electronic controller.
Thermistor failure
Replace the thermistor.
3.
The unit boils
continuously
Low Air Pressure
Recalibrate the unit (see section 5F
sub section v) for how to recalibrate
the unit
Electronic Controller
failure
Test the electronic controller.
Thermistor failure
Replace the thermistor.
4.
The unit overflows
Incoming water pressure
is too high
Reduce incoming water pressure.
Solenoid valve failure
Turn the unit off. If water still
overflows, replace the solenoid
valve.
Level probe failure
Clean the level probe
Replace the level probe
5.
There is no water from
the tap
The unit did not fill with
enough water
See 1. & 2. above.
The tap diaphragm is
disconnected from its
spindle
Drain water out of the unit
(see paragraph 6 on page 4).
When unit is empty, disassemble
and repair the tap.
**It is strongly recommended that any REMEDY be carried out by a qualified service person**
NOTE: Should the unit have a fault in which the machine is leaking, turn the power off and open
the tap to drain the unit. DO NOT REMOVE THE UNIT FROM THE WALL, as service will only be
carried out if the unit is still mounted and connected.