21
ENGLISH
DAY
DAY
b
If the reset attempts do not activate the boiler, contact the Technical Assistance
Centre.
For fault E041
If the pressure drops below the safety threshold of 0.3 bar the boiler displays the fault code
<<E041 water transducer load the system>>
for a transitional time of
30sec.
DAY
When the transitional time has finished, if the fault persists the fault code E040 is displayed
.
When the boiler has fault E040 manual loading should be carried out using the filling tap
(
A
) until
the pressure is between 1 and 1.5 bar
. Then press RESET.
C
lose the filling tap, making sure to hear the mechanical snap
.
At the end of the procedure, proceed with the automatic vent cycle as described in the section
"3.15 Filling the heating system and eliminating air".
A
b
If the drop in pressure is very frequent, contact the Technical Assistance Centre.
For fault E060
The boiler is working normally, but does not provide any stability of the domestic hot water
temperature that, in any event, is supplied at a temperature of around 50°C. The intervention
of the Technical Assistance Service is required.
For fault E091
The boiler has an auto-diagnostic system which, based on the total number of hours in
certain operating conditions, can signal the need to clean the primary exchanger (alarm
code E091).
Once the cleaning operation (made with special kit supplied as an accessory) it is necessary
to reset to zero the total hour meter following procedure indicated below:
access the technical parameters as explained in the section
"3.20 Access to the
parameters"
select the CONF menu and then EXHAUST PROBE RESET with the keys
and
set the parameter to 1 confirming the selection with
Enter
.
NOTE:
The meter resetting procedure should be carried out after each in-depth
cleaning of the primary exchanger or if this latter is replaced.
The total hours can be verified in the following way:
access the INFO menus as indicated in the paragraph "4.21 INFO menu" at EXHAUST
PROBE RESET to display the value of the flue gases probe meter.
Boiler faults list
ERROR
CODE
FAULT
RED LED
GREEN LED
RED and GREEN LED
DESCRIPTION OF
ALARM TYPE
E010
flame lockout/ACF electronic fault
ON
definitive
E011
extraneous flame
flashing 0,2 sec. ON/0,2 sec. OFF
transitional
E020
limit thermostat
flashing 0,5 sec. ON/0,5 sec.
OFF
definitive
E030
fan fault
ON
definitive
E040
water transducer – load system
ON
definitive
E041
water transducer – load system
flashing 0,5 sec. ON/0,5 sec. OFF
transitional
E042
water pressure transducer fault
ON
definitive
E060
domestic hot water probe fault
flashing 0,5 sec. ON/0,5 sec. OFF
transitional
E070
flow sensor fault
flow sensor overtemperature
flow/return sensor differential alarm
ON
transitional
definitive
definitive
E077
main zone water thermostat
ON
transitional
E080
return line probe fault
return line probe overtemperature
outlet/return line probe differential alarm
ON
transitional
definitive
definitive
E090
flue gas probe fault
flue gas probe overtemperature
flashing 0,5 sec. ON/0,5 sec. OFF
transitional
definitive
E091
clean primary heat exchanger
flashing 0,5 sec. ON/0,5 sec. OFF
transitional
E099
reset attempts exhausted, boiler blocked
It is referred to the last fault occurred
definitive,
not resettable
--
water pressure low check system
flashing 0,5 sec. ON/0,5 sec. OFF
transitional
--
water pressure high check system
flashing 0,5 sec. ON/0,5 sec. OFF
transitional
--
boiler board communication lost
ON
transitional
--
BUS 485 communication lost
ON
transitional
List of combustion faults
ERROR
CODE
RED LED
GREEN LED
FAULT
DESCRIPTION OF ALARM TYPE
E021
ON
ion alarm
These are temporary alarms that if they occur 6 times in an hour they become definitive; the E097 alarm is displayed and
is followed by post-purging for 45 seconds at the fan's maximum speed.
It is not possible to release the alarm before the end of the post-purging unless the boiler's power supply is switched off.
E022
ON
ion alarm
E023
ON
ion alarm
E024
ON
ion alarm
E067
ON
ion alarm
E088
ON
ion alarm
E097
ON
ion alarm
Summary of Contents for MYNUTE X 25 C
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