Short Parts List; Fault Finding And Diagnosis; Fault Finding - Worcester Greenstar i System ErP Series Installation, Commissioning And Servicing Instructions

Fault finding and diagnosis

7.8

Short parts list

Only use Worcester original spare parts with this
appliance. Non Worcester original spare parts will
invalidate the guarantee (if applicable) and any
warranty.
Gasket -burner
8 716 110 534 0
Burner (9kW, 12kW,
15kW, 18kW NG &
LPG)
8 716 116 379 0
Fuse
8 716 116 900
Spark generator
8 716 117 077
High limit stat
8 707 206 196 0
Flow NTC
8 714 500 087 0
Pump assembly
8 716 117 400
Pressure relief valve
3 bar
8 716 106 431 0
Control panel
8 716 117 070
Pressure gauge
8 76 116 428 0
Table 45 Parts list main appliance
Parts list when integral diveter valve is fitted
Diverter valve
assembly
8 716 117 405
Cylinder temperature
sensor
8 716 116 824
Table 46 Parts list integral diverter valve kit
64
8
8.1
Electrodes (including
gasket & shield)
Should a fault develop with this appliance (or the system), the appliance
8 716 116 381 0
will enter a locking or blocking condition, and fault code information will
Burner (21kW & be generated as described in this section.
24kW NG & LPG)
Locking error
8 718 120 619 0
O ring - siphon
8 716 113 851 0
Siphon
8 716 117 083
Blocking error The appliance will stop operating with no fault data
Gas valve
8 718 600 04A 0
Flue overheat
thermostat
8 710 506 267 0
Fault code
Fan
Cause code
8 716 117 417
Auto air vent
Maintenance
8 716 106 445 0
codes
Expansion vessel
8 716 117 023
By pass valve
H09
8 716 106 434 0
H13
Diverter valve motor
8 718 682 839 0
Table 47
Fault finding and diagnosis

Fault finding

This fault finding information is for guidance only.
Worcester cannot be held responsible for costs incurred
by persons not deemed to be competent.
The appliance display will flash a warning triangle and
fault code. At the same time a (static) cause code will
also be displayed. Manual intervention is required
following clearance of the fault:
▶ Press the reset button briefly once on the
appliance facia
• The last eight locking errors can be found in the
History menu ( section 7.1.1, page 49).
displayed. The condition will clear automatically when
the associated fault clears e.g. waiting for an area to
cool. In some cases a blocking error has a defined
time duration prior to changing to a locking condition.
• The last eight blocking errors can be found in the
History menu ( section 7.1.1, page 49).
Alpha numeric code indicating the fault group
Three digit number. During a blocking error (or normal
operating status) it is not displayed, but accessed in
the info menu via the spanner/return button. During a
locking error the cause code flashes on the display.
These are displayed with the letter H followed by a
number. The code advises of a situation that will need
some attention but is not a fault that will stop the
appliance from functioning.
• The maintenance messages can be found in the
History menu ( section 7.1.1, page 49).
• Two examples are listed below:
Communications to the pump has failed.
The feedback signal has been lost, possible causes
are electrical connections loose or disconnected,
pump has been replaced with an incorrect type.
A time has been set in the Service interval function i.e.
1 to 72 months and that time has expired. Service
reminder time in the Boiler settings menu
(section 6.5.13, page 45) allows this feature to be set
(1 to 72), a 0 will disable this function.
Resistance values
▶ Component resistance characteristics can be found
in section 8.2, page 70.
• Flow temperature NTC sensor
• DHW NTC sensor
• Flue overheat thermostat
• Overheat thermostat
• Outdoor weather compensation sensor
• Cylinder temperature sensor
• Gas valve
Greenstar i System - 6 720 806 945 (2015/07)
ErP