Plum ecoMAX 80 R1, Instruction Manual

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40
18 DESCRIPTION OF ALARMS
18.1 No fuel
If the boiler temperature in the OPERATION
mode drops by 10
°
C below the preset boiler
temperature, the regulator will start counting
the
no fuel detection time.
MENU -> SERVICE SETTINGS -> BOILER
SETTINGS ->
no fuel detection time
If during that countdown there is no increase
in the boiler temperature by 1
°
C, the
regulator will disable the CH and DHW pump
and will start counting the
no fuel detection
time . This protects the boiler against
excessive cool down. If after that time the
temperature does not increase by 4
°
C, the
regulator will enter the STOP mode and show
the “No fuel” alarm on the display. If the
boiler temperature approximates the preset
boiler temperature (difference t≤ 10
°
C), the
pumps are activated and countdown of the
no fuel detection time is stopped. Cancel by
restarting the regulator.
Drawing 46 View of the „No fuel” ala rm
If the regulator identifies fuel
shortage incorrectly, increase the
parameter
no fuel detection time
point 14.9, or decrease the
difference between the measured
boiler temperature and
preset CH
temp.
In the upper section of the screen,
you can see the number of alarms
occurring at the same time. Sign
1/2 means that there were two
alarms, and the first of them is
visible, etc. Move to the next alarm
by turning the “TOUCH and PLAY”
knob.
18.2 Exceeding max. boiler temperature
Protection against boiler overheating is
twofold. First, after exceeding the
boiler
cooling preventive temp. (by default 90
°
C) ,
the regulator tries to decrease the boiler
temperature by dropping the excessive heat
to the DHW tank and by opening the mixer
servo (only if mixer cycle = on CH). If the
boiler temperature drops, the regulator will
resume normal operation. Whereas is the
temperature continues to rise (reaches
95
°
C), fuel feeder and fan are disabled and a
permanent boiler overheating alarm – with
sound signalling – is activated. If during the
boiler overheating alarm the temperature
measured by the DHW sensor (8) exceeds
the value
Max. DHW temp., the DHW pump
is disabled. This protects the DHW users
against scalding. Whereas the mixer pump is
not disabled at the moment of exceeding the
Max. preset mixer temperature , if mixer
operation = CO ON was set. The mixer pump
is disabled at the moment of exceeding the
Max. preset mixer temperature , if mixer
operation = FLOOR h.ON was set.
Cancel the alarm by restarting the regulator.
Caution: placing the temperature
sensor beyond the boiler water
jacket, e.g. on the outlet pipe, is
not recommended, as it can delay
detection of the boiler overheating.
Drawing 47 View of alarm „ max. boiler temperature
overheating”
18.3
Exceeding max. feeder temperature
This alarm will occur after the feeder
temperature exceeds the service parameter
Max. feeder temp.
MENU -> SERVICE SETTINGS -> BOILER
SETTINGS ->
Max. feeder temp.
If the feeder temperature exceeds this value,
the regulator will enable the feeder for a
constant, programmed time of 10 minutes.