Hubbard Systems LITEAIR LE R410A User manual

Qui k start up pro edure
V1.1 11-12-2015
LE R410A
with heater
LE COOLING STORAGE UNIT
LE/LC R410A SYSTEM
OPERATING
INSTRUCTIONS
ECA Qualified

Qui k start up pro edure
This Quick Start up section is designed to get you up and running with the minimum of fuss. Just follow these 5 simple steps.
Notes:
1 All probes must be of the same type, either PTC or NTC;
2. Probes must be at between - 50 to 60°C for auto recognition to work;
3. If 1 minute expires before you have completed quick set up, either turn OFF / On power to start set up again or enter
parameter as per the instructions and adjust your parameter settings manually (see Section 9).
Table 1: parameter “tC’ settings
Not: “tC” settings 3, 4, 5 and 6 use lectrical defrost as default. Hot Gas is possible by setting parameter “tdF” for gas defrost.
Settings 1,2,3, and 7 do not require that the 2nd and the 3rd probe to be fitted. YTake note of the number of probes to be connected
for the selected application. lectrical / Hot Gas defrost, time initiated / temperature terminate
As you change parameter tC, defaults change and should be approximately correct for that application but we strongly
recommend you check all parameter default values listed in these instructions to ensure they suit your application and
make further adjustments if necessary. Read the following sections for information about programming.
ST P 1 Install the Universal-R, connect the correct number of probes and connect
the wiring - See below:
1. Table 1: parametertC settings
2. Section 5: Typical connections
ST P 2 Turn on power,
TH N WITHIN 1 MINUT COMPL T ST PS 3, 4 AND 5.
ST P 3 Press the “DOWN” keyfor 3 seconds and the controller will automatically
recognise and adjust itself to the type of probe connected. (The display
briefly shows tPd followed by ntC or PtC).
ST P 4 Press the “AUX/tc” key for 3 seconds and the setting of parameter tC is
displayed. Use the UP or DOWN keys to adjust to required setting then
confirm by pressing S T (see table 1 below).
ST P 5 Press S T for 3 seconds until the °C or °F icon starts to flash, then adjust
the S T POINT using the UP or DOWN keys, then press S T again to
confirm.
LE R410a Operating Instru tions
V1.1 11-12-2015
Parameter Type of Control Required
tC probes
1 On / Off thermostat - Cooling x1
2 Off cycle defrost (timed) x1
3 lectrical / Hot Gas defrost, time initiated / time terminated x1
4 lectrical / Hot Gas defrost, time initiated / temperature terminated x2
5 lectrical / Hot Gas defrost, time initiated / temperature terminated + evap. fan delay x2
6 Double evaporators applications (similar to setting 5) x3
7 On / Off thermostat - Heating x1

Button and their fun tions
Programming mode
To enter programming level Pr1 (user programming level), keep both S T and DOWN buttons pressed for 3 sec. The first parameter
label will appear. Browse parameter list by using the UP or Down buttons. Press S T to see a parameter’s current value and UP or
Down buttons to alter its value. Press Set to confirm change (the display will blink for 3 sec and then the next parameter will appear)
or by waiting for the menu timeout to expire (15 sec). If no parameter is available for change in Pr1 level, a noP label will be shown.
First enter Pr1 level(as described above) then with any parameter label displayed keep both S T and DOWN buttons pressed for 8
sec. The first parameter label will appear. Browse parameter list by using the UP or DOWN buttons. Press S T to see a parameter’s
current value and UP or DOWN buttons to alter its value. Press S T to confirm change (the display will blink for 3 sec and then the
next parameter will appear) or by waiting for the menu timeout to expire (15 sec).
From Pr2 level it is also possible to add or remove any parameter to / from Pr1 by pressing both S T and DOWN while its label is
displayed. Accessibility of any particular parameter via Pr1 level is confirmed by the alarm L D lighting up while its label is
displayed.
WARNING: If no button is pressed for 15 sec, any modified value will be stored into memory and the controller will return to the
normal display mode.
BUTTON FUNCTION
Type Controller menu: Keep this button pressed for at least 3 sec within 1 min after power on to enter the “Type Controller Menu” (tC)
AUX output control: Switches the AUX relay output (if enabled as such).
Manual Defrost: Keep this pressed for 3 seconds to start a manual defrost cycle. The defrost icon will illuminate. (Not possible if
parameter tC = 1 or 7).
Display current set point: After pressing and releasing this button, the set point will be displayed for 5 sec. This will not allow the set
point to be altered.
Changing set point value: Keep this button pressed for at least 2 sec. Set point change mode is entered indicated by the small led’s
flashing. Change the set point using the UP and DOWN buttons. The new value can be stored either by pressing S T button (the
instrument restores temperature display) or by waiting the exit time-out to expire (15 sec).
(UP): To see the max stored temperature; in programming mode it browses the parameter codes or increases the display value.
(DOWN): To see the min stored temperature; in programming mode it browses the parameter codes or decreases the display value.
Keep press 3 sec just after powering on the device (and within the first 60 sec) to start automatic probe recognising.
Keep pressed 2 sec to switch the instrument off when the parameter onF = 1.
LE R410a Operating Instru tions
V1.1 11-12-2015
SINGL BUTTON FUNCTIONS
BUTTON COMBINATION FUNCTIONS
US R PROGRAMMING L V L - PR1
PROT CT D PROGRAMMING L V L - PR2 (ALL VISIBL PARAM T RS CAN B FOUND H R )
COMBINATION FUNCTION
Lock and unlock the keyboard: Keeping both buttons pressed for 3 sec will lock or unlock the keyboard.
The display will flash PoF or Pon for a few seconds to confirm locking or unlocking respectively.
nter programming mode: Keep both buttons pressed for 3 sec. release them and then press again for 8 sec.
The first label of Pr2 level will be displayed.
xit programming mode: Press together to return to normal display.

Other features of the Controller
As well as the main digital display, there are some small icons on the front panel.
These are used to monitor the loads controlled by the instrument. ach icon
function is described in the following table.
Display signalling description
Thermostat overide (not available when parameter tC = 1 or 7)
For rapid chilling or freezing, the thermostat can be overridden by pressing the UP button until the icon lights up. The
compressor will run in continuous mode, irrespective of temperature, for the time period set in parameter CCt. Normal operation will
then resume automatically. The cycle can also be terminated manually by pressing the UP button again for about 3 seconds.
Defrost types
tdF = 0: Defrost is electrical.
tdF = 1: Defrost is by hot gas.
Evaporator fan ontrol (only when parameter tC = 5 or 6)
The fan control mode is selected by means of the “FnC” parameter
(*) Note: Fans will stop if the temperature value set in parameter “FSt” is exceeded.
ICON FUNCTION M ANING
ON Light (AUX) output enabled.
ON Cooling enabled
FLASHING Anti-short cycle delay in progress.
ON Fan enabled.
FLASHING Delay time on fan activation is running (Fnd > 0).
ON Defrost in progress.
FLASHING Drip time in progress (Fdt > 0) or delay on start defrosting is running (dSd > 0).
ON Auxiliary output activated.
ON nergy Saving activated.
ON Thermostat overide enabled.
ON ALARM signal: When in programming mode and in Pr2 level, this lights up notifying this parameter is also accessible in the
Pr1 level.
ON All measurement units are in Celsius degrees.
FLASHING Programming mode.
ON All measurement units are in Fahrenheit degrees.
FLASHING Programming mode.
LE R410a Operating Instru tions
V1.1 11-12-2015
tC parameter value Action
1 or 7 No defrost.
2 Off cycle defrost by timer.
3, 4, 5 or 6 Forced type of defrost: lectrical or Hot Gas.
FnC parameter value Action
0 Fans will cycle ON and OFF with the compressor and be off during defrost cycle.
1 Fans will run continuously, but be off during defrost cycle.
2 Will switch ON and OFF with the compressor and be on during defrost cycle (*).
3 Fans will run continuously and be on during defrost cycle (*).

Parameter FSt sets the fan stop temperature. This is the maximum temperature, detected by the evaporator probe, above which the
evaporator fans will stop.
Leave FSt above ambient temperature during commissioning to avoid fan short cycle.
After finishing the defrost phase, there is a stand still drain time, set by parameter Fdt. When this period has expired, the
refrigeration cycle commence but the evaporator fans remain off until Fnd (fan delay) times out.
Spe ial appli ations - Dead Band Control
With [oAC = 1], the compressor relay controls cooling as normal but the 4th (auxillary) relay is used to control a heater. The value
entered in parameter HY will now be set equal on both sides of the S T POINT. xample: If [HY = 1°C] that will create a 2°C Dead Band.
At [S T POINT + HY], cooling switches on. At [S T POINT - HY], heating switches on. ither cooling or heating switch off when
temperature returns to S T POINT.
Alarms
The alarm buzzer can be muted, by pressing any button. The controller will briefly show the reset “r S” label. Parameter tbA defines
how the alarm relay will respond to the muting of the buzzer.
- tbA = 0: The alarm relay will remain active until the alarm condition is rectified.
- tbA = 1: The alarm relay de-activates when the buzzer is muted.
In either case, the display will flash an alarm label until the condition is rectified.
The Dixell Universal-R is provided with an internal watchdog verifying data and memory integrity. Alarm “ ” will flash after
detecting a failure in data or in the internal memory. In this case, the alarm output is enabled.
WHAT TO DO
1. Cancel the alarm by pressing a button.
2. Check the value of the parameters and restore correct values when wrong.
3. Check the correct instrument operation and in case of further errors replace it.
Probe alarms “P1”, “P2” and “P3” start 30 seconds after a fault in probe is detected; they automatically stop 30 seconds after the
probe restarts normal operation. Check connections before replacing the probe.
Temperature alarms “HA” and “LA” automatically stop as soon as the thermostat temperature returns to normal values and when
defrost starts. Temperature alarms “HA2” and “LA2” automatically stop as soon as the condenser temperature returns to normal
values.
Removing se urity level prote tion
It is possible to allow access to any parameter from Pr1 level. To do this, go into Pr2 as previously described. Scroll to the label of
the parameter you require and then press the S T and DOWN buttons in quick succession. The decimal point L D will be on
indicating that access to this particular parameter is now possible from Pr1 level. Its label will now appear when in Pr1
programming level and its value can be altered. To restore security level protection, use the same procedure (the decimal point L D
will go out after pressing both buttons).
LE R410a Operating Instru tions
V1.1 11-12-2015
D AD BAND CONTROL (COOLING & H ATING)
MUTING ALARM BUZZ R & R LAY
ALARM “ ”
ALARM R COV RY
Message Message - Mode Cause Outputs
Flashing Data or memory failure Alarm output ON; Other outputs unchanged.
P1 Flashing Thermostat probe failure Alarm output ON; Compressor output according to parameters Con and CoF.
P2 Alternative with room temperature vaporator probe failure Alarm output ON; Other outputs unchanged; nd defrost is timed.
P3 Alternative with room temperature Second evaporator probe failure Alarm output ON; Other outputs unchanged; nd defrost is timed.
HA Alternative with room temperature High temperature alarm Alarm output ON; Other outputs unchanged.
LA Alternative with room temperature Minimum temperature alarm Alarm output ON; Other outputs unchanged.
HA2 Alternative with room temperature Condenser max temp alarm Alarm output ON; Other outputs unchanged.
LA2 Alternative with room temperature Condenser max temp alarm Alarm output ON; Other outputs unchanged.
dA Alternative with room temperature Door open alarm Alarm output ON; Outputs re-start if parameter rrd = 1.
A Alternative with room temperature Generic external alarm Alarm output ON; Other outputs unchanged.
bAL Alternative with room temperature Serious external alarm Alarm output ON; Other outputs OFF.