E.C.A. GP11, Service Manual

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SERVICE REMINDER FUNCTION
Service reminder function will be activated if the input power is supplied to the control board for
7500 hours. SE will be displayed together with the service icon on the user interface. Control board
continues normal operation during service reminder function. Service reminder must be cancelled
by RESET knob. After resetting the service reminder by RESET knob, service reminder will be
activated again for 2 more times in 72 hours. After 3rd resetting of service reminder function, it
will be activated again after 7500 hours.
Service reminder time is cleared and 7500 hours counting is restarted if 20 is written to PP31.
ANTIFREEZE FUNCTION
If the water temperature, measured by the CH flow NTC probe is under the low limit for “No-frost
ON temperature in table 1”, the burner is turned on. After flame detection the modulation level is
set to the minimum. If the CH flow NTC probe temperature goes over the high limit for the “No-
frost OFF temperature in table 1”, the burner is turned off. The antifreeze function operates in the
mode SUMMER or OFF or WINTER when the heat demand is not available on room thermostat
inputs. In lock-out condition only the pump is energized.
If No-frost temperature OFF value is not reached in a period (No-frost timeout period) antifreeze
is stopped and pump is energized for 3 min.
During antifreeze function, display shows “AF” and CH temperature alternately.