Worcester Greenstar 25Si Compact Installation, Commissioning And Servicing Instructions page 3

Wall hung rsf gas fired condensing combination boiler
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7.8.30 Replacing the control unit . . . . . . . . . . . . . . . . . . . . . . . 56
7.8.31 Expansion vessel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
7.9
Short parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
8
FAULT FINDING AND DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . 59
8.1
Internal wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . . 59
8.2
Central heating function . . . . . . . . . . . . . . . . . . . . . . . . 60
8.3
Preheat and DHW function . . . . . . . . . . . . . . . . . . . . . . 61
8.4
Protection function . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
8.5
Information and service menus . . . . . . . . . . . . . . . . . . . 63
8.5.1 Selecting the information menu . . . . . . . . . . . . . . . . . . 64
8.5.2 Selecting service menus . . . . . . . . . . . . . . . . . . . . . . . . 65
8.5.3 Menu 1 - System parameters . . . . . . . . . . . . . . . . . . . . 66
8.5.4 Menu 2 - Boiler parameters . . . . . . . . . . . . . . . . . . . . . . 66
8.5.5 Reset to factory settings . . . . . . . . . . . . . . . . . . . . . . . . 67
8.5.7 Using the test menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
8.6
Fault codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Greenstar Si Compact
ErP
- 6 720 813 278 (2015/07)
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