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-UNIT PARAMETERS
PARAMETER LOCKED
CANNOT BE CHANGED
P01 REFRIGERANT
R134a
Pxx STAGE DIFF
xx.x
5-ADJUSTMENT PARAMETERS
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