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Idiomas disponibles
4.7.9 Maintenance parameter
PARAMETER
CODE
Reset chiller hour counter
rSHU
Reset compressor 1 hour
rSH1
counter
Reset compressor 2 hour
rSH2
counter
Reset compressor 3 hour
rSH3
counter
Reset compressor 4 hour
rSH4
counter
Reset alarm history
rSSt
4.8 Chiller operation
4.8.1
Status machine
It is possible to see the status machine on the digital output
Stato
Descrizione
chiller OFF
Unit Status
:
chiller ON
Unit Status
:
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
> 50°F
step control
< 50°F
together
Example
set = 45°F; dif = 7.2 °FC; ambient temp. <50°F
- when the water inlet temperature reaches 48.2 ° F (45 + 3.2) :
compressor 1 starts;
- when the water inlet temperature reaches 52.2 ° F (45 + 7.2):
compressor 2 starts.
set = 45°F; dif = 7.2 °F; ambient temp. >50°F
- when the water inlet temperature reaches 52.2 ° F (45 + 7.2):
compressors 1 and 2 starts;
Warning: a compressor can only restart after a stop of 6
minutes.
English
4.9 Alarms management
TYPE
DEFAULT
When the button
U
-
Press the button to see the type of alarm.
U
es:
-
U
-
U
-
U
-
U
-
Note: eliminate the cause of the fault for clear the alarm.
Carry out the repair.
press the button
If this message appear "noAL"
noAL
press the button
4.9.1
Digital input alarms
CODE
High pressure alarm 1 from pressure switch
HP1
LP1
Low pressure alarm 1 from pressure switch
tP
Pump thermal cutout alarm
Water tank low water level alarm / No water
LL
fl ow
HP2
High pressure alarm 2 from pressure switch
Low pressure alarm 2 from pressure switch
LP2
Protection alarm compressor 1
PI1
/ Phases monitor
Protection alarm compressor 3
PI2
/ Phases monitor
(P1)
is red, una alarma está presente.
HP1
High pressure Alarm
Circuit 1
(P1)
HP1
High pressure Alarm
Circuit 1
(P1)
to reset the alarm.
DESCRIPTION
RESET
PCW420-650
CODE
DESCRIPTION
Protection alarm compressor 2
PI2
/ Phases monitor
Protection alarm compressor 4
PI4
/ Phases monitor
4.9.2
Analog input alarm
AI
CODE
DESCRIPTION
Tank water outlet water high tem-
HA1
perature alarm
b1
Tank water outlet water low tem-
LA1
perature alarm
Sensor open circuit or short circuit
St1
Evaporator 1 outlet water high
HA2
temperature alarm
Evporator 1 outlet water low tem-
b2
LA2
perature alarm
St2
Sensor open circuit or short circuit
HA5
High ambient temperature warning
b5
Low ambient temperature warning
LA5
St5
Sensor open circuit or short circuit
Evaporator 2 outlet water high
HA7
temperature alarm
b7
Evporator 2 outlet water low tem-
LA7
perature alarm
St7
Sensor open circuit or short circuit
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
M
power was lost.
M
M
A
M
M
M
M
RESET
M
M
RESET
Warning
A
M
Warning
A
M
Warning
Warning
M
Warning
Warning
M
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