Vaillant ecoTEC VU 656/4 Installation And Maintenance Instructions Manual

Also see for ecoTEC VU 656/4: Installation manual Operating manual

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Installation and maintenance instructions ecoTEC 0020029173_0148Display Meaning Display value/adjustable valued.81 Operating hours hot water generation in h1)d.82 Burner start-ups in heating mode Number/1001) (3 equals 300)d.83 Burner start-ups in hot water mode Number/1001) (3 equals 300)d.84 Maintenance indicator: Number of hours until the nextmaintenanceSetting range: 0 to 3000h and "-“ for deactivatedFactory setting: "-“ (300 corresponds to 3000h)d.93 DSN appliance variant setting Setting range: 0 to 99d.96 Factory setting 1 = yes (Resetting adjustable parameters to factory setting)2 = no1) In the diagnosis codes 80 to 83 5 digit figure values are stored. When selecting e.g. d.80 only the first two digits of the figure valueare displayed (e.g.10). By pressing the "i“ key, the display switches over to the last three figures (e.g. 947). The operating hourscounter of the heating in this case would be 10947 h. Pressing the "i" again causes the display to switch back to the diagnosis pointthat was called up.Table 9.3 Diagnosis codes at diagnosis level 2 (continued)9.1.3 Fault codesThe fault codes displace all other displays when errorsoccur. Errors are displayed as "F ...", e.g. "F.10"(see Table 9.4).If several errors occur simultaneously, each fault code isdisplayed for approximately two seconds on analternating basis.Once you have repaired the error push the faultclearance key to restart the boiler.If the error cannot be repaired and reoccurs despitehaving carried out several fault clearance attempts,please contact your factory customer service.9.1.4 Fault memoryThe last ten errors which occurred are saved in theappliance fault memory.• Push the "i“ and „-“ buttons simultaneously.• Scroll back in the error memory with the "+" button.You can exit the fault memory display as follows:• Push the "i" buttonor• Do not push any buttons for about 4 minutes.Depending on the settings, the current flow temperatureor current filling pressure of the heating installationreappears in the display.9 Troubleshooting