EVCO S.p.A.
EV3 MVC & EVD MVC | Application manual ver. 1.0 | Code 144EV3MVI104
page 56 of 72
The alarm signal is activated if the probe selected as a change-over
probe is in alarm mode or has been improperly configured
Automatic alarm
Main results
- inhibits the automatic change-over operations
AL20 AH2O
Water temperature alarm
The alarm signal is activated in hot mode if the water probe
temperature is below the setpoint value, after a period equal to A13
from when the water valve is opened. It is deactivated when the
temperature rises above the setpoint + C37* 1/2
The alarm signal is activated in cold mode if the water probe
temperature is above the setpoint value, after a period equal to A13
from when the water valve is opened. It is deactivated when the
temperature falls below the setpoint + -C38* 1/2
Main results
- The water coil is switched off
AL21 ASF
Filter pressure switch alarm
The alarm is activated if the input configured as filter pressure switch is
active. It deactivates if the input is inactive.
Automatic alarm
Main results
- signal only
EA01
EA02
EA03
EA04
EA05
EA06
EA07
EA08
EA09
EA10
EA11
EA12
EA13
EA14
EA15
EA16
Probe alarms
The alarm is activated in the following situations:
- when a probe short circuits or is interrupted
- if the upper or lower limits set for a probe are exceeded
Non-configured analogue inputs do not cause alarms.
Automatic alarm
Main results
- Regulation concerning faulty probes are interrupted
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