Worcester 28i RSF User Manual

32
The overheat thermostat can be
reset by pressing the reset button,
but if it trips immediately or on a
regular basis a serious problem has
occurred therefore contact your
installer
Reset thermostat
Overheat Thermostat Check
Pump Check
Fan Check
Does button hold in?
Secure Connector
Secure Connector
Faulty pump
Is pump connector
secure on the PCB (X3)?
Is fan connector
secure on the
PCB (X4)?
Is mains present at the
pump connector
(X3 pins 1 & 2)?
Is mains present at the
fan connector
(X4 pins 1 & 2)?
ATTACH to heat
exchanger
Is capillary broken?
Ensure appliance is
cool and retest
Replace overheat
thermostat
Is capillary firmly
ATTACHED
to exchanger?
GO TO
CHECK I
GO TO
CHECK O
GO TO
CHECK L
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
YES
NO
NO
NO
Faulty Harness
Faulty fan
YES
Mains at fan
NO

Worcester 28i RSF Specifications

General

Model	28i RSF
Output	28kW
Mounting	Wall-mounted
DHW Output	28kW
ERP Rating	A
Fuel Type	Natural Gas
Water Pressure	3 bar