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USER MANUAL – Release 1.2 of 01/01/2010
Page 43 of 191
Version: 02/03/2010
US 38
Auxiliary proportional output n°4 differential
0.0
0
0.0
0
25.0
45
14.0
203
°C
°F
Bar
Psi
Dec
int
Dec
int
US 39
Auxiliary proportional output n°4 minimum value
0
US40
%
US 40
Auxiliary proportional output n°4 maximum value
US39
100
%
Alarms
Parameter Description
min
max
um
Resolution
Low pressure alarm
AL 1
Low pressure alarm delay from digital/analogue input switching
0
250
Secs
AL 2
Defines the low pressure alarm working with pump down enabled
0 = independent from pump down function
1 = disable the compressors until the end of the alarm condition
2 = enable the compressors start even if the alarm condition is still active
0
2
AL 3
Low pressure alarm from analogue input set point
-50.0
-58
0.0
0
110
230
50.0
725
°C
°F
bar
psi
Dec
int
Dec
int
AL 4
Low pressure alarm from analogue input differential
0.1
0
0.1
1
25.0
45
14.0
203
°C
°F
bar
psi
Dec
int
Dec
Int
AL 5
Maximum number of low pressure alarm (digital or analogue input)
occurrences per hour. If the number exceeds AL05 the alarm becomes
manual reset.
Reset is always manual if AL05 = 0
Reset is always automatic if AL05 = 60
Reset moves from automatic to manual if AL05 moves from 1 to 59
0
16
AL 6
Low pressure alarm detection enabling in defrost mode
0
1
AL 7
Low pressure alarm delay in defrost mode
Delay time between alarm condition occurrence and reaction by device
0
250
Secs
AL 8
Low pressure alarm detection enabling in remote OFF remote
/ Stand-by mode
0
1
High pressure alarm
AL 9
High pressure/temperature alarm from analogue input set point
-50.0
-58
0.0
0
110
230
50.0
725
°C
°F
bar
psi
Dec
int
Dec
int
AL 10
High pressure/temperature alarm from analogue input differential
0.1
0
0.1
1
25.0
45
14.0
203
°C
°F
bar
psi
Dec
int
Dec
int
AL 11
Maximum number of high pressure/temperature alarm (digital or analogue
input) occurrences per hour. If the number exceeds AL11 the alarm becomes
manual reset.
Reset is always manual if AL11 = 0
Reset is always automatic if AL11 = 60
Reset moves from automatic to manual if AL11 moves from 1 to 59
0
60
Oil pressure/level alarm
AL 12
Delay on oil low pressure / low level alarm detection from compressor start
0
250
Secs
AL 13
Delay on oil low pressure / low level alarm detection from digital input
switching.
After expiration of AL12 the unit waits further AL13 delay before detecting the
alarm
0
250
Secs
AL 14
Maximum number of oil low pressure / low level alarm occurrences per hour
Reset is always manual if AL14 = 0
Reset is always automatic if AL14 = 60
Reset moves from automatic to manual if AL15 moves from 1 to 59
0
60
AL 15
Oil low pressure / low level alarm enabling
with compressor
OFF
0
1
Evaporator flow / supply fan overload alarm working mode
AL 16
Delay on evaporator flow / supply fan overload alarm detection from water
pump / supply fan activation
0
250
Secs
AL 17
Delay on evaporator flow / supply fan overload alarm activactivation before
moving from automatic to manual reset
0
250
Secs
AL 18
Delay on evaporator flow / supply fan overload alarm activation from digital
input switching
0
250
Secs
AL 19
Delay on evaporator flow / supply fan overload alarm automatic reset from
deactivation of the digital input (disabled if the alarm has turned to manual
reset)
0
250
Secs
AL 20
Evaporator flow switch polarity detection enabling. If the polarity detection is
enabled the alarm occurs if the polarity doesn’t change after the pump start
regardless the polarity configuration.
0
1
