EN - 21
5.5 Unit parameters menu
To enter the UNIT PARAMETERS menu, press
+
or
–
to position the cursor on 4 then press
OK
.
The display shows the list of configuration parameters.
Use the
+
and
–
buttons to scroll through the tables at a rate of two rows at a time.
To modify a parameter the configuration must be unlocked (via parameter P99). This turns off the machine.
To change a value:
Press
OK
to enter the parameter.
Use the
+
or
–
buttons to increment or decrement the value of the parameter then press
OK
to confirm the changes.
Press
OK
to save the change to memory.
The square at the bottom right (
↓
arrow) should flash while the value of a parameter is being changed.
In the case of parameters, the letter
P
flashes.
The text in messages scrolls in a loop. Numerical values (with adjustment ranges), however, do not scroll in a loop.
If a parameter is locked (P99 = yes), the
symbol is displayed at the top left.
To return to the main menu, press the
ESC
button repeatedly.
If the user tries to access a locked parameter, the following message appears for 2 seconds then the parameter is redisplayed.
If the user changes the status of a parameter from "LOCKED" to "NO", the text is replaced by
Pxx
and the
symbol disappears.
The following parameters can then be accessed:
P01
Refrigerant type: R134a
P02
Unit type: water-to-water or air-to-water.
P03
Number of circuits: number of circuits in the chiller.
P08
Unit
size.
P09
Compressor start-up: compressor start-up configuration.
P15
Measurement of electrical quantities: yes or no.
P16
Rating of primary current transformer (module 1)
P17
Rating of secondary current transformer (module 1)
P18
Rating of primary current transformer (module 2)
P19
Rating of secondary current transformer (module 2)
P21
Variable speed drive: whether or not the optional VSD is
used and how it is controlled
P24
Hydraulic module: whether or not a hydraulic mode is
installed.
P25
Number of pumps: 1 or 2.
P26
0-10 V programmable output: used to control a three-way
valve on the hot water circuit
P28
Master/slave control of two parallel-connected units: yes
or no.
P29
Total heat recovery on the condenser: yes or no.
PXX
HP1/HP2/HP3 sensor high pressure: adjustment of the
HP sensors.
PXX
HP1/HP2/HP3 sensor low pressure: adjustment of the
HP sensors.
PXX
LP1/LP2/LP3 sensor high pressure: adjustment of the
LP sensors.
PXX
LP1/LP2/LP3 sensor low pressure: adjustment of the
LP sensors.
P42
Electronic expansion valve.
P43
Superheat protection: enable or disable superheat
protection.
P44
Minimum superheat temperature
P45
Maximum superheat temperature
P48
Liquid injection cut-in temperature for reducing the
discharge temperature.
P49
Differential for adjusting the injection cut-off temperature.
P51
Discharge temperature limit: determined by the compressor
manufacturer.
P52
Water line frost protection limit: determined based on the
refrigerant type.
P54
HP control limit: corresponds to the HP control.
P55
LP fault threshold: corresponds to the LP safety.
P56
Minimum
discharge
superheat
temperature: determined by
the compressor manufacturer.
P57
HPS cut-out HP value: HPS management.
P61
Liquid valve opening time.
P61
Liquid valve closing time.
P70
Control LP limit.
P99
Parameter lock: locks the machine parameters (set by the
manufacturer).
5.6 Adjustment parameters menu
To enter the ADJUSTMENT PARAMETERS menu, press
+
or
–
to position the cursor on 5 then press
OK
.
The display shows the list of control parameters.
The letter
P
flashes. To select a setpoint, press
+
(up) and
–
(down).
Example:
Press
+
or
–
to scroll through the parameters two lines at a time.
To change a value: The bottom right of the screen flashes. Press
+
to raise the value or
–
to lower it.
To return to the main menu, press the
ESC
button repeatedly.
4 - U N I T P A R A M E T E R S
P A R A M E T E R L O C K E D
C A N N O T B E C H A N G E D
P01
R E F R I G E R A N T
R 1 3 4 a
Pxx
S T A G E D I F F
x x . x
5 - A D J U S T M E N T P A R A M E T E R S