TW10i
12
1 No water from hot
tap.
2 No hot water.
3 Water too hot.
4 Unit switches off
during use – water
suddenly goes cold.
1.1 Isolating stopvalve
turned off.
1.2 Filter blocked.
1.3 Outlet side may be
blocked.
1.4 Blockage in mains
supply pipe.
1.5 Main water pipe
frozen.
2.1 Safety overheat
cut-out has operated.
2.2 Electrical
malfunction.
3.1 Not enough water
flowing through heater.
3.2 Increase in ambient
water temperature.
4.1 Interrupted power
supply.
4.2 Water flow too little.
1.1.1 Open valve
1.2.1 Clean filter.
1.3.1 Unscrew and check outlet tap.
1.4.1 Check for water flow in supply pipe
leading up to the heater inlet.
1.5.1 Switch off at the isolating switch and
check for evidence of freezing. Contact Customer
Service for advice.
2.1.1 Turn off at the isolating switch and have
the unit checked by a suitably qualified electrician
or contact Customer Service.
2.2.1 Turn off at the isolating switch and have
unit the checked by a suitably qualified electrician
or contact Customer Service.
3.1.1 See ‘no water from hot tap’ and their
appropriate action/causes.
3.2.1 Increase the flow rate from the outlet tap or
select low power setting.
4.1.1 Blown fuse or circuit breaker. Check
supply. Renew or reset fuse or circuit breaker. If it
fails again, consult a qualified electrician.
4.1.2 Power cut. Check other appliances and if
necessary, contact local Electricity Supply Co.
4.2.1 Open tap further to increase water flow.
It is advised that all electrical repairs/maintenance to the
heater should be carried out by a suitably qualified person
FAULT FINDING
IMPORTANT: Switch OFF the electricity at the mains supply and remove the circuit fuse before
removing the cover from the heater while attempting any fault finding inside the unit.
Problem/Symptom Cause Action/cure
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