Installation and Operation manual ETHOS 36C and ETHOS 54C –1511/05-issue1
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6 FAILURES
There are a number of situations during which the appliance will shut down due to a failure and can only be activated again
by pressing the Info button. Failures are indicated by a flashing dot behind the water temperature in the lower right side
corner of the display. By pressing the Info button, the failure will be shown briefly and the boiler will automatically start
operating again.
The following 'lock-out' failures can occur. A flashing F followed by a digit on the display shows the type of failure.
Display code:
Failure description: Cause of failure
(see table 11):
Blank Power supply failure 14;20;27;36;37;38;50
F0 High limit thermostat opened 4;5;21;23;24;28;29;30;31
42;43;46;47
F1 Code key error 13;63
F2 Manually generated boiler failure for
programming with computer
15;63
F4 Ionisation failure 10;11;16;17;18;22;25;35;34
F6 Ionisation during rest 18;35;61
F7 End of programming 48
F8 Fan error 7;8;9;13;19;39;40;41
F9 VKK coupling error ( not applicable for UK ) 41;42;67
Fuse: 250 VAC 2A. Delay fuse
Display code: Failure description: Cause of failure
t messages Temporarily blocked See section. 5.1.
Table 9 Failures
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