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Control
h
Alarm table
Code
Alarm description
Comp
Fan
Pump
Aut/Man
Delay
Notes
Status
Status
Status
Reset
AL01
CPS efficiency alarm
Off
Off
Off
Man
30 sec
AL02
Sys 1 Antifreeze alarm
Off Sys 1
Run
Run
Man
No
AL03
Sys 2 Antifreeze alarm
Off Sys 2
Run
Run
Man
No
AL04
Flow meter alarm
Off
Off
Off
Man
Parameter
AL05
Sys 1 Low pressure
Off Sys 1
Run
Run
Man
Parameter
AL06
Sys 2 Low pressure
Off Sys 2
Run
Run
Man
Parameter
AL07
Sys 1 High pressure
Off Sys 1
Run
Run
Man
No
AL08
Sys 2 High pressure
Off Sys 2
Run
Run
Man
No
AL11
Compressor 1 thermal switch
Off Comp. 1
Run
Run
Man
No
AL12
Compressor 2 thermal switch
Off Comp. 2
Run
Run
Man
No
AL13
Compressor 3 thermal switch
Off Comp. 3
Run
Run
Man
No
AL14
Compressor 4 thermal switch
Off Comp. 4
Run
Run
Man
No
AL15 Fan
thermal
Off
Off Run Man No
AL21
Failure of probe B1 Tin
Off
Off
Run
Auto
10 sec
AL22
Failure of probe B2 Tout1
Off
Off
Run
Auto
10 sec
AL23
Failure of probe B3 Tout2
Off
Off
Run
Auto
10 sec
AL24
Failure of probe B4 Tair
Run
Run
Run
Auto
10 sec
AL25
Failure of probe B5 Tcoil1
Off
Off
Run
Auto
10 sec
(1)
AL26
Failure of probe B6 Tcoil2
Off
Off
Run
Auto
10 sec
(1)
AL27
Failure of probe B7 Sys 1 HP tranduscer
Off
Off
Run
Auto
10 sec
AL28
Failure of probe B8 Sys 2 HP tranduscer
Off
Off
Run
Auto
10 sec
AL31
Maintenance of compressor 1
Run
Run
Run
Man
No
AL32
Maintenance of compressor 2
Run
Run
Run
Man
No
AL33
Maintenance of compressor 3
Run
Run
Run
Man
No
AL34
Maintenance of compressor 4
Run
Run
Run
Man
No
AL55
Failure of clock card
Run
Run
Run
Man
No
h
Setpoint
Pressing the Set key allows you to enter the Set point
level accessible to the user. The parameters that can
be set are listed below, along with the limit values
and the default values (standard shop settings):
User parameters
Control mode
Min value
Max value
Default
Cooling Set point
Return Control
8
20
10
Outlet Control
6
20
8
Cooling Set point - glycol water
Return Control
-15
20
10
Outlet Control
-15
20
8
Proportional band
Return Control
1
10
5
Neutral differential band
Outlet Control
1
6
2
Heating Set poing
Return Control
20
45
40
Outlet Control
20
50
40
Select language
——
ITA
ENG
FRENCH GERMAN SPANISH
Italian
System 1 ON/OFF
——
ON
OFF
OFF
System 2 ON/OFF
——
ON
OFF
OFF
In this level you can select the language of operation. The choice is between English and Italian. Languages available on demand: French - German -
Spanish. Every single circuit is activated through the relevant parameters. All quantities at Manufacturer Level are available in Italian only.
NOTE: Leaving water temperature (VLS 504-1204)
WARNING: In VLS 504-1204 models, a pre-freezing control is always enabled. If the leaving water temperature reaches critical values, the unit’s
chilling capacity is reduced for some time.
In general, if the leaving water temperature (LWT) control is selected, the user and the installer shall bear in mind that the controlled temperature is giv-
en by the mean of the leaving water temperatures, from the two circuits.
For an ideal use of the control of the leaving non-glycol water, it is recommended to avoid presetting leaving water Set-Point values below 8°C (de-
fault).
(1) = Forced defrosting every 40 min.
Manuale VLS-VLH1 17-06-2005 9:05 Pagina 24
