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4.5 Parameter management
4.5.1
Temperature setting (see fi g.1)
1. 1. Turn the main swicth (QS) to "ON" and wait for the temperature
visualization.
2. Press buttons "P3" and "P5" together, to enter into "dIrE" (D)
parameters.
3. Press button "P4" to select "SEt" parameter, press the button
"P5" to confi rm.
4. Change the value, using the up and down arrow buttons "P3" and
"P4", then press button "P5" to confi rm.
6. Press the button "P3" to return on "dIrE" parameter.
7. Press the button "P5" to exit.
4.5.2
Differential setting (see fi g.1)
1. Turn the main swicth (QS) to "ON" and wait for the temperature
visualization.
2. Press buttons "P3" e "P5" together, to enter into "dIrE" (D)
parameters.
3. Press button two times "P4" to select "diF" parameter, press the
button "P5" to confi rm.
4. Change the value, using the up and down arrow buttons "P3" and
"P4", then press button "P5" to confi rm.
6. Press the button two times "P3" to return on "dIrE" parameter.
7. Press the button "P5" to exit.
4.5.3
Visualization sensors B1,B2...
"B1" is the "set" sensor of the macchine.
1. Start the chiller.
2. Press the button "P4" to visualize the temperature of the next sen-
sor.
3. Press the button "P5" to visualize the sensors "b01" .."b02"....
It is recommended to leave on the display the B1 "set" sensor.
PCW420-650
4.6 Alarms management
4.6.1
Digital input alarms
ID
CODE
LED
DESCRIPTION
High pressure alarm 1 from pres-
HPI
ID1
L5
sure switch
Low pressure alarm 1 from pres-
LPI
ID2
L6
sure switch
tP
ID3
L7
Pump thermal cutout alarm
Water tank low water level alarm /
LL
ID4
L8
No water fl ow
Protection alarm compressor 1
PII
ID6
L9
/ Phases monitor
Protection alarm compressor 3
PI3
ID7
L9
/ Phases monitor
1AC1
ID8
-
Circuit 1 alarm available
High pressure alarm 2 from pres-
HP2
ID6
L5
sure switch
Low pressure alarm 2 from pres-
LP2
ID7
L6
sure switch
Protection alarm compressor 2
PI2
ID11
L9
/ Phases monitor
Protection alarm compressor 4
PI4
ID12
L9
/ Phases monitor
1AC2
ID13
-
Circuit 2 alarm available
4.6.2
Allarmi da ingressi analogici
AI
CODE
DESCRIPTION
Tank water outlet water high tempera-
RESET
HAI
ture alarm
M
Tank water outlet water low tempera-
B1
LAI
ture alarm
M
StI
Sensor open circuit or short circuit
Evaporator water outlet water high
M
HA2
temperature alarm
A
B2
Evporator water outlet water low tem-
LA2
perature alarm
M
St2
Sensor open circuit or short circuit
HA3
High ambient temperature warning
M
LA3
B3
Low ambient temperature warning
M
St3
Sensor open circuit or short circuit
HA5
M
Water tank high temperature alarm
LA5
B5
Water tank low temperature alarm
M
St5
Sensor open circuit or short circuit
Evaporator water outlet water high
M
HA7
temperature alarm
Evporator water outlet water low tem-
B7
M
LA7
perature alarm
St7
M
Sensor open circuit or short circuit
4.7 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.
6/8
RESET
Warning
A
M
Warning
A
M
Warning
Warning
M
Warning
Warning
M
Warning
A
M
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