Table of contents
3
Greenstar 4000 – 6 720 891 161 (2020/09)
9.7 Replacing the gas valve . . . . . . . . . . . . . . . . . . . . . . . . .68
9.8 Combi boilers: checking the plate heat exchanger . . . .68
9.9 Replacing the expansion vessel. . . . . . . . . . . . . . . . . . .68
9.10 Replacing the PRV . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
9.11 Replacing the pressure sensor. . . . . . . . . . . . . . . . . . . .69
9.12 Pressure gauge removal . . . . . . . . . . . . . . . . . . . . . . . . .69
9.13 Replacing the control unit . . . . . . . . . . . . . . . . . . . . . . .69
10 Fault finding and diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
10.1 Operating and fault displays . . . . . . . . . . . . . . . . . . . . .70
10.1.1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
10.1.2 Operating/Fault code table . . . . . . . . . . . . . . . . . . . . . .71
10.1.3 Faults that are not displayed . . . . . . . . . . . . . . . . . . . . .79
11 Environmental protection and disposal . . . . . . . . . . . . . . . . .82
12 Data Protection Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
13 Technical Specifications/Logs . . . . . . . . . . . . . . . . . . . . . . . . .83
13.1 Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
13.2 Energy consumption. . . . . . . . . . . . . . . . . . . . . . . . . . . .86
13.2.1 Product data on energy consumption . . . . . . . . . . . . . .86
13.3 Component resistance characteristics . . . . . . . . . . . . .88
13.3.1 Sensor values - Flow temperature sensor . . . . . . . . . . .88
13.3.2 Sensor values - DHW temperature sensor. . . . . . . . . . .88
13.3.3 Sensor values - Flue overheat thermostat. . . . . . . . . . .88
13.3.4 Sensor values - Heat exchanger assembly
temperate limiter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
13.3.5 Sensor values - Outside temperature sensor . . . . . . . .88
13.4 Code plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
13.5 Pump characteristic map of the heating pump. . . . . . .89
13.6 Setting values for output . . . . . . . . . . . . . . . . . . . . . . . .89
13.6.1 Gas setting values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89
13.7 Internal wiring of the appliance . . . . . . . . . . . . . . . . . . .90
13.8 Gas Boiler System Commissioning Checklist and
Warranty Validation Record . . . . . . . . . . . . . . . . . . . . . .92
13.9 Inspection and maintenance checklist . . . . . . . . . . . . .93
13.10 Service and Interim Boiler Work Record . . . . . . . . . . . .94
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