LAZER BOILING WATER UNIT: FAULT FINDING GUIDE.
**It is strongly recommended that any REMEDY be carried out by a qualified service person**
SYMPTOMS
POSSIBLE CAUSE | REMEDY |
1.The unit does not fill with water
2.The unit fills water to low level and does not heat
3.The unit boils continuously
4.The unit overflows
5.There is no water from the tap
There is no power supply There is no water supply The inlet strainer is blocked
Electronic Controller failure
Solenoid Valve failure
The Filter is blocked (If unit is supplied with an inlet water filter)
Thermal
Heating element failure
Electronic Controller failure Thermistor failure
Low Air Pressure
Electronic Controller failure Thermistor failure
Incoming water pressure is too high
Solenoid valve failure
Level probe failure
The unit did not fill with enough water
The tap diaphragm is disconnected from its spindle
Check the electrical supply. Check the water supply.
Check the Inlet Strainer, clean or replace.
Test the electronic controller.
Check resistance of the solenoid, replace if broken.
Check the filter, replace if blocked (see section 5E for re setting the filter)
Reset the thermal
If the heating element is properly wired, then check its resistance. Replace if broken.
Test the electronic controller. Replace the thermistor.
Recalibrate the unit (see section 5F sub section v) for how to recalibrate the unit
Test the electronic controller. Replace the thermistor.
Reduce incoming water pressure.
Turn the unit off. If water still overflows, replace the solenoid valve. Clean the level probe
Replace the level probe
See 1. & 2. above.
Drain water out of the unit (see paragraph 6 on page 4).
When unit is empty, disassemble and repair the tap.
10.
