Plum ecoMAX 200 W, Operation And Maintenance Manual

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Drawing 2 AL1 alarm
No sound signal will be given.
The way and methods of detecting fuel
shortage are described in point 12.21.
14.2 Boiler temperature sensor damage
AL2
This alarm will be produced in the case of
damage to the boiler sensor, and after
exceeding its measuring range. The alarm
sauces shut-down of the central heating and
hot utility water pumps, in order to cool the
boiler down, if applicable. A sound signal is
also activated.
The alarm is cancelled after returning to the
sensor measurement range, and after
disabling and enabling the regulator via the
mains switch.
In such case, check the sensor, and possibly
replace it.
The method of checking the
temperature sensor is described in
point 11.8
14.3 Exceeding the maximum boiler
temperature AL3
This alarm will occur after the boiler exceeds
temperature determined by the factory
parameter
Boiler overheating alarm
temperature P0. By default, this parameter is
set to 90  C. In such case, the fan is turned
off, and the central heating and hot utility
water pumps are activated. A sound signal is
also activated. The hot utility water pump
works only until the hot utility water tank
exceeds the maximum temperature r3
(service parameter). This protects the users
against possible scalding.
After the boiler temperature drops, the
regulator resumes normal operation.
It is suggested to set the P0 value
below the safety temperature
limiter actuation threshold. Thanks
to this, a momentary exceeding of
the boiler temperature will not
cause stoppage of the boiler.
Before the boiler reaches the P0
temperature, the regulator will
attempt to drop the excessive heat
to the hot utility water tank. If the
hot utility water tank reaches the
maximum temperature permitted
by the r3 parameter, the hot utility
water pump is turned off, and the
AL3 alarm is produced.
Note: 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.
14.4 Exceeding maximum emission
temperature
The regulator warns the user of a danger of
emission temperature sensor damage if the
emission temperature exceeds 450°C. Such
situation can occur if the wrong regulator
parameters are set, or if the boiler door are
left open.
The alarm is signalled visually, by a warning
triangle symbol, and with a sound – short
warning signals.
15 Replacement of parts and
subassemblies
When ordering parts and subassemblies,
please specify necessary information read off
the rating plate. It is best to give the
regulator serial number. If the serial number
is not known, please specify the model and
type of the regulation, as well as the year of
its production.
15.1 Replacing mains fuse
The mains fuse can be found in the regulator
front panel. It protects the regulator and the
devices fed by it. Please use time-delay
fuses, porcelain, 5x20mm, of nominal
burnout current 3,15A, e.g.
02153.15P made
by LittelFuse .
In order to remove the fuse, push in its
socket with a flat-tip screwdriver and turn it
counter clockwise.