What To Do If Things Go Wrong (2) Professional Service - Heatstore Multiflow 9.5kW Installation And User Manual

PROFESSIONAL SERVICE
If the previous "Self Help" checks fail to restore the performance, you should seek professional help.
The person who installed the shower is probably the best one to investigate and correct it and is
certainly the person to contact if you have had a problem in the guarantee period.
The following additional checklist is provided for the benefit of the qualified service person.
WARNING: SWITCH OFF THE ELECTRICITY AT THE LOCAL ISOLATOR
BEFORE REMOVING THE COVER TO MAKE CHECKS
Symptom
Little or no water flows
- neon light off
Cold water only
- neon light off
Water too cold
- neon light on
Water flow too low or
temperature too high
Water goes from hot to
cold
WHAT TO DO IF THINGS GO WRONG (2)
Cause
The water pressure is very low.
The main water is connected to
the OUTLET of the unit.
The water pressure is too low.
The thermal cut-out has
triggered.
The flow switch is not working.
The power select screw is set to
"LO".
One element is not working.
The Power Supply Voltage has
dropped.
The service valve is fitted to the
OUTLET.
There are constrictions in the
plumbing.
The service valve is fitted to the
OUTLET.
What to do
Use a pump to boost the supply from
a storage tank.
Reconnect the main supply to the
INLET (marked in blue).
Use a pump to boost the supply from
a storage tank.
Reset it by opening the unit and
pushing the button on the cut-out
(diagram 11). Before you do this you
must remove the cause of the
problem
Contact Heatstore.
Change the power select screw to
"HI" (diagram 7).
Switch off the electricity supply and
check the resistance of the elements.
You should get the following readings.
Loading (kW)
9.5
10.8
12.0
The heater should only draw the
following currents:
40 amps for the 9.5kW model
45 amps for the 10.8kW model
50 amps for the 12.0kW model
Fit the service valve to the INLET of
the unit
Check the plumbing. Only use PTFE
tape for making pipe joints
Fit the service valve to the INLET of
the unit
10
Resistance (Ohms)
12.0
10.6
9.6