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the last service/commissioning, this may suggest someone has been topping it the heating
system up with water. Further investigation for a leak may be necessary.
Heating Circuit Pressure – The system pressure of the heating circuit should be inspected on
the installed pressure gauge. The pressure should be between 1 and 2 bar. The pressure
should be adjusted accordingly. If the pressure has dropped significantly since the last
service/commissioning, this may suggest a leak somewhere in the system.
Heating Manifold - The condition of the manifold, together with the operating of any motorised
valves and the flow rates in each circuit should be inspected.
Heating Pipework & Sealing - The condition of the heating pipework including joints and
insulation should be inspected and repaired as necessary.
Heating Circuit Safety Devices – Safety devices such as pressure and temperature relief valves
should be manually activated to confirm their operation. A pressure relief device is located
inside the unit. Defective devices should be replaced immediately.
Heating Flow Rate – The maximum heating flow rate achievable should be checked. The
heating flow rate should be checked against the maximum flow rate recorded on the
commissioning certificate. If the flow rate is found to have dropped significantly, this may
indicate a blockage in the system or a problem with the pump. Further investigation is required.
Insulation Inside Unit – The condition of pipe insulation and sound proofing in the appliance
casing should be inspected for damage. If either is found to be damaged or defective, it should
be replaced. Insulation kits are available from Warmflow.
Note: All product warranties will be invalidated if the appliance is not serviced at least
annually or as indicated by the user interface controller (whichever occurs sooner) by a
Warmflow engineer or other trained and competent engineer and details recorded in the
service record section of this manual.
In the event of a breakdown please contact your commissioning engineer who should then
contact our service department whilst at your home, to report the fault.
3.15 Alarms and Troubleshooting
3.16 Alarms
The control system built into the appliance includes an alarm utility. The alarm utility shuts the
appliance down and activates alarms if a fault or abnormality develops in the appliance.
The alarms situations in the following pages suggest possible causes for the activation of each
alarm. Suggested actions for each alarm condition are also included. The suggested actions are
attributed to the user (typically the homeowner) or a Warmflow engineer or other trained and
competent engineer, and should be conducted in the order suggested. The possible causes and
suggested actions are not exhaustive.
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