UTC 15
9
10.0 FAULT FINDING
Disconnect the electrical supply before removing the terminal cover. It
is recommended that any service operations on the UTC 15 heater are
carried out by a competent person.
NOTE:
Use only Heatrae Sadia approved spare parts. Replacement of
any parts with components not recommended by Heatrae Sadia will
invalidate the guarantee and may render the installation dangerous.
ACTION
POSSIBLE CAUSES
FAULT
1. Check electrical supply
1. Electrical supply fault
Water not heating
h
/ h
l
necessary replace
thermostat operation. If
operated reset and check
2. Check cut-out, if
2. Thermal cut-out tripped
necessary
operation, replace if
3. Check thermostat
3. Thermostat fault
replace.
resistance. If faulty
continuity and insulation
4. Check element for circuit
4. Element fault
supply is on.
1. Check mains water
turned on
1. Cold water supply not
No water flow - General
2. Check for obstructions.
supply
2. Blockage in cold water
connections to tapset
1. Check water
correctly installed
1. Open Outlet tapset not
Outlet installations
No water flow - Open
2. Check for obstructions.
2. Blockage in tapset
1. Check for obstructions.
1. Blockage in tapset
Fed installations
No water flow - Cistern
float valve.
Check operation of cistern
cistern tank is turned on.
2. Check water supply to
2. Cistern tank empty
float valve.
Check operation of cistern
equal to outlet flow rate.
and that inlet flow rate is
cistern tank is turned on
1. Check water supply to
as outlet flow rate
1. Cistern not filling as fast
installations
reduces - Cistern Fed
Water flow gradually
necessary.
obstructions, clear as
2. Check vent pipe for
2. Vent pipe blockage
