EVCO S.p.A.
EV3 HRV & EVD HRV
| Application manual ver. 1.0a | Code 1443DHRVE104
page 61 of 74
Code
Label on display
Description
AL08
ALP
Low pressure alarm
The alarm is activated if the input configured as a low pressure input is active. It is deactivated 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
- the fans are running at maximum speed
AL09
AL10
AFnS
AFnr
Supply or return fan alarm
The alarm is activated if: - the input configured as fan thermal switch is active; - the input
configured as fan tachometer does not receive feedback from the fan even though it is active with
a minimum speed of 5%.
The alarm is deactivated if: - the input configured as fan thermal switch is not active; - the input
configured as fan tachometer receives feedback from the fan.
The alarm is activated after a period equal to A03 from when the event occurs.
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 switch is active. It is
deactivated if the input is inactive.
Manual alarm.
Main results:
- the compressor is switched off
AL12
AdS
Compressor discharge high temperature alarm
The alarm signal is activated if the value of the probe configured as compressor discharge rises
above the A11 parameter value, and it is deactivated when this measurement falls below A11-
A12.
Automatic alarm.
Main results
- the compressor is switched off
AL13
AFnH
Fan hour alarm
The alarm signal is activated if the fan hour value is above the limit set by parameter A01.
The alarm switches off when the fan hours are reset on the menu.
Automatic alarm.
Main results:
- signal only
AL14
ACPH
Compressor hour alarm
The alarm signal is activated if the compressor hour value is above the limit set by parameter
A02
The alarm switches off when the compressor hours are reset on the menu.
Automatic alarm.
Main results:
- signal only
AL15
AOdM
External air damper alarm.
The alarm signal is activated when the limit switch sensors for the external air damper do not
react quickly enough (A10) when movement is ordered.
Manual alarm.
Main results
- all loads are switched off