EVCO S.p.A.
EV3 MVC & EVD MVC | Application manual ver. 1.0 | Code 144EV3MVI104
page 54 of 72
configured analogue inputs do not cause alarms.
Automatic alarm
Main results
- the functions linked to the probes in alarm mode are
inhibited
AL04 ACoM
Communication alarm
The alarm signal is activated when communication with the expansion
is missing for longer than 10 seconds
Manual alarm
- All loads are switched off
AL05 AFro
Antifreeze alarm
The alarm signal is activated when the value of the water probe is
lower than the A15 value; it deactivates when the value is above
A15+A16
The alarm is delayed for a period equal to A14 from reaching the
threshold temperature
Automatic alarm
Main results
- the water valve is opened to the maximum aperture
AL06 Atr
Electric coil heater thermal switch alarm
The alarm is activated if the input configured as a heater thermal
switch input is active. It deactivates if the input is inactive.
Manual alarm
Main results
- The electric coil is switched off
AL07 AHP
High circuit pressure alarm
The alarm is activated if the input configured as a high pressure input
is active. It deactivates if the input is inactive.
Manual alarm
Main results
- The compressor is switched off.
AL08
ALP
Low circuit pressure alarm
The alarm is activated if the input configured as a low pressure input is
active. It deactivates if the input is inactive.
The alarm is activated after a delay of A04 from compressor switch-on.
It reverts to manual reset if the number of alarm events in an hour
exceeds A05.
Main results
- The compressor is switched off.
AL09
AL10
AFnS
AFnr
Supply or return fan alarm
The alarm is activated if the input configured as fan thermal switch is
active. It deactivates if the input is inactive.
The alarm signal is activated if the input configured as a tachometric
input detects a different speed for the one set; it is deactivated if the
speed detected is the same as expected (only control other than 0).
The alarm is activated after a period equal to A03 after the event
happens
Manual alarm
Main results
- All loads are switched off
AL11 AtC
Compressor thermal switch alarm
The alarm is activated if the input configured as compressor thermal
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