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Hyperchiller 076-116
4.8 Chiller operation
4.8.1 Status machine
It is possible to see the status machine on the digital output
Stato Descrizione
Unit Status :
chiller OFF
Unit Status :
chiller ON
4.8.2 Pump
The pump starts together with the chiller, a few seconds later.
It turns off together with the chiller, a few seconds later.
4.8.3 Compressor
The ON/OFF of the compressors depends on the water outlet
temperature (b1) with reference to the “set” and “dif” param-
eters.
The compressor ON/OFF logic depends on the ambient tem-
perature.
Ambient Temperature ON/OFF compressor
> 10°C
step control
< 10°C
together
Example
set = 7°C; dif = 4 ° C; ambient temp. <10°C
- when the water inlet temperature reaches 9 ° C (7 + 2) :
compressor 1 starts;
- when the water inlet temperature reaches 11 ° C (7 + 4):
compressor 2 starts.
set = 7°C; dif = 4 ° C; ambient temp. >10°C
- when the water inlet temperature reaches 11 ° C (7 + 4) :
compressors 1 and 2 starts;
Warning: a compressor can only restart after a stop of 6
minutes.
4.9 Alarms management
When the button (P1) is red, una alarma está presente.
Press the button to see the type of alarm.
es:
HP1
High pressure Alarm
Circuit 1
Note: eliminate the cause of the fault for clear the alarm.
Carry out the repair.
press the button
(P1)
If this message appear “noAL”
noAL
HP1
High pressure Alarm
Circuit 1
press the button (P1) to reset the alarm.
4.9.1 Digital input alarms
CODE DESCRIPTION RESET
HP1
High pressure alarm 1 from pressure switch M
LP1
Low pressure alarm 1 from pressure switch M
tP
Pump thermal cutout alarm M
LL
Water tank low water level alarm / No water
ow
A
HP2
High pressure alarm 2 from pressure switch M
LP2
Low pressure alarm 2 from pressure switch M
PI1
Protection alarm compressor 1
/ Phases monitor
M
PI2
Protection alarm compressor 2
/ Phases monitor
M
4.9.2 Analog input alarm
AI CODE DESCRIPTION RESET
b1
HA1
Tank water outlet water high tem-
perature alarm
Warning
LA1
Tank water outlet water low tem-
perature alarm
A
St1
Sensor open circuit or short circuit M
b2
HA2
Evaporator water outlet water high
temperature alarm
Warning
LA2
Evporator water outlet water low
temperature alarm
A
St2
Sensor open circuit or short circuit M
b3
HA3
High ambient temperature
(antifreeze) warning
Warning
LA3
Low ambient temperature
(antifreeze) warning
Warning
St3
Sensor open circuit or short circuit M
b5
HA5
Water tank high ambient tempera-
ture alarm
Warning
LA5
Water tank low ambient tempera-
ture alarm
Warning
St5
Sensor open circuit or short circuit M
4.10 Automatic restart
In the event of a power failure, when power is restored the
chiller will assume theOn-Off statusheld at themoment the
power was lost.
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