Emerson Universal-R Wiring diagram

UNIVERSAL–R

1592031000 Univ-R4 GB - r1.1 - 2012.07.23 Universal-R 2/20
GREAT NEW FEATURES on the Universal-R
DUAL VOLTAGE 12V & 230V POWER SUPPLY
Both low (12Vac/dc) and high voltage (230Vac) power supply inputs are
present in this single controller (see the rear connections of the device).
QUICK AND SAFE START UP FUNCTION SELECTION
Direct selection of the controller functionality by pressing a dedicated button,
during a fixed time interval, at start up.
NEW FRONT FASCIA DESIGN
Display with illuminated icons to indicate loads, alarms, status indications.
Six buttons give direct access to main functions and menu.
DOUBLE EVAPORATOR DEFROST FUNCTION
A new feature allows defrost control of twin evaporators. The 4th (AUX) relay
and probe 3 (Pb3) control defrost of the second evaporator. Only when both
have terminated will refrigeration re-start. Independent parameters are
present to control the second evaporator.
ON/OFF BUTTON
Dedicated button to switch the controller on and off.

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1. INDEX
1. INDEX____________________________________________________________________________________3
2. GENERAL WARNING _______________________________________________________________________4
3. GENERAL DESCRIPTION ___________________________________________________________________4
4. QUICK START UP PROCEDURE – Up and running in 5 easy steps __________________________________5
5. TYPICAL CONNECTIONS - FOR GENERAL GUIDANCE ONLY _____________________________________6
6. PARAMETER TABLE and factory default settings _________________________________________________7
7. PARAMETERS – THEIR FUNCTIONS IN DETAIL _______________________________________________10
8. BUTTONS AND THEIR FUNCTIONS__________________________________________________________15
9. PROGRAMMING MODE____________________________________________________________________15
10. OTHER FEATURES OF THE UNIVERSAL-R ___________________________________________________16
11. THERMOSTAT OVERRIDE ( not available when parameter tC = 1 or 7 )______________________________16
12. DEFROST TYPES_________________________________________________________________________16
13. EVAPORATOR FAN CONTROL (only when parameter tC = 5 or 6)__________________________________16
14. SPECIAL APPLICATIONS – DEAD BAND CONTROL ____________________________________________17
15. ALARMS_________________________________________________________________________________17
16. REMOVING SECURITY LEVEL PROTECTION__________________________________________________17
17. MOUNTING ______________________________________________________________________________18
18. ELECTRICAL CONNECTIONS_______________________________________________________________18
19. PROBES_________________________________________________________________________________18
20. TECHNICAL DATA ________________________________________________________________________18
21. FAULT FINDING _________________________________________________________________________19

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2. GENERAL WARNING
WARNING: The Universal-R should always be installed by a suitable qualified person, in accordance with best
electrical and refrigeration practice. Take time to read the instructions. Do not exceed the relay ratings. The
Universal-R should not be considered a safety device, use suitable safety cutout devices when appropriate.
This manualis part of the product and should be kept near the instrument for easyand quick reference.
The instrument shallnot be used for purposes different from those described hereunder. It cannot be used as a safety device.
Check the application limits before proceeding.
Dixell Srl reserves the right to change the composition of its products, even without notice, ensuring the same and unchanged
functionality.
2.1 SAFETY PRECAUTIONS
Check the supply voltage is correct before connecting the instrument.
Do not expose to water or moisture: use the controller onlywithin the operating limits avoiding sudden temperature changes with high
atmospheric humidity to prevent formation of condensation
Warning: Disconnect allelectricalconnections before anykind of maintenance.
The instrument must not be opened.
Fit the probes where they are not accessible bythe End User.
In case of failure or faulty operation send the instrument back to the distributor with a detailed description of the fault.
Do not exceed the maximum current that can be applied to each relay (see TechnicalData).
Ensure that the wires for probes, electrical loads and the power supply are separated and far enough away to each other, without
crossing or intertwining.
In case of applications in industrial environments, the use of mains filters (our mod. DIXL930) in parallel with inductive loads could be
useful.
Heating applications – Do not exceed 105°C with the NTC probes supplied. For higher temperatures (up to a maximum of 150°C)
use specialPTC probes (e.g. our Part No. DIXL957).
3. GENERAL DESCRIPTION
Model Universal-R is a 71x29 mm format microprocessor based controller, suitable for applications on high, medium or low temperature
refrigeration units. It is provided with three relay outputs to control compressor, defrost - which can be both electrical or hot gas - and
evaporator fans. It can work with PTC or NTC probes. Where defrost is being terminated by time, it can operate with just one thermostat
probe. Where defrost is being terminated bytemperature, it has an input for an evaporator probe(s).
The Universal-R is equipped with an internal alarm buzzer, a flashing visualalarm as well as a 4th relay (volt free) that can be configured
as Auxiliary or Alarm, to control a heater in Dead Band control (see parameter oAC) or to control the defrosting of a second evaporator
(when “tC” parameter is set to 6).
Double evaporator defrost: When tC=6, the controller is set up to defrost twin evaporators. Defrost of both evaporators will start
simultaneously but each evaporator will terminate defrost individually on temperature. Only when both evaporators have terminated defrost,
willthe controller revert to refrigeration.
Each instrument is fully configurable through specialparameters that can be easily programmed through the keypad.

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4. QUICK START UP PROCEDURE – Up and running in 5 easy steps
This Quick Start Up section is designed to get you up and running with the minimum of fuss. Just follow these 5 simple steps.
STEP 1
Installthe new Universal-R, connect the correct number of probes and
connect the wiring - See below:
1. Table 1: parameter tC settings
2. Section 5: Typical connections
STEP 2
Turn on power,
THEN WITHIN 1 MINUTE COMPLETE STEPS 3, 4 AND 5.
STEP 3
Press the “DOWN”keyfor 3 seconds and the controller will automatically
recognise and adjust itself to the type of probes connected. (The display
briefly shows tPd followed byntC or PtC).
STEP 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 bypressing SET (see table 1 below).
STEP 5
Press SET for 3 seconds untilthe °C or °Ficon starts to flash, then adjust
the SET POINT using the UP or DOWN keys, then press SET again to
confirm.
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
Parameter
tC Type of Control Required probes
1 On / Off thermostat – Cooling x 1
2 Off cycle defrost (timed) x 1
3 Electrical/ Hot Gas defrost, time initiated / time terminated x 1
4 Electrical/ Hot Gas defrost, time initiated / temperature terminated x 2
5 Electrical/ Hot Gas defrost, time initiated / temperature terminated + evap. fan delay x 2
6 Double evaporators applications (similar to setting 5) x 3
7 On / Off thermostat – Heating x 1
Note: “tC”settings 3, 4, 5 and 6 use Electrical defrost as default. Hot Gas is possible by setting parameter “tdF” for gas defrost. Settings
1, 2, 3 & 7 do not require that the 2nd and the 3rd probe to be fitted. Take note of the number of probes to be connected for the selected
application.
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 particular application
and make further adjustments if necessary. Read the following sections for information about programming.

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5. TYPICAL CONNECTIONS - FOR GENERAL GUIDANCE ONLY
Table 2: typical connections
Parameter tC = 1, 2
On / Off thermostat or Off Cycle Defrost Controller.
Parameter tC = 3
Forced defrost controller, time initiated & time terminated.
Parameter tC = 4
Forced defrost controller, time initiated & temperature
terminated.
Parameter tC = 5
Forced defrost controller, time initiated & temperature
terminated with evaporator fan delay after defrost.
Parameter tC = 6
Double evaporator applications.
Parameter tC = 7
Heating applications.

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6. PARAMETER TABLE and factory default settings
IMPORTANT: Always set parameter “tC” first. As you move “tC” between settings 1 to 7, allnon-relevant parameters will be masked. After
setting “tC”, it willbe possible to modify allthe other relevant parameters.
WARNING!!
Always switch the power OFF and then ON at the end of programming to update any parameter changes.
Make sure you connect the correct number of probes to suit the setting of parameter tC. Failure to do this will cause probe
alarms
tC setting No. Probes Type
1, 2, 3 and 7 1 Room only
4, 5 2 Room + Evaporator 1
6 3 Room + Evaporator 1 + Evaporator 2
Any probe alarms can be cleared by turning off / on the power
Table 3: default controller parameters
Description Label Adjustment Range Factory defaults with parameter “tC” 1- 7
1 = On / Off Thermostat 1
2 = Off cycle defrost 2
3 = Time / time defrost 3
4 = Time / temp defrost 4
5 = Time / temp defrost + fan delay 5
6 = Double evaporator defrost 6
Type (category) of controller
7 = On/ Off Thermostat for heating 7
Set Point LS to US 2.0°C;
36°F 2.0°C; 36°F 2.0°C; 36°F 2.0°C; 36°F 2.0°C; 36°F 2.0°C; 36°F 40.0°C;
104°F
Probe type
0 = PTC
1 = NTC 1 1 1 1 1 1 1
Differential
0.1 to 25.5C;
1 to 45°F 2.0°C;
2°F 2.0°C; 2°F 2.0°C; 2°F 2.0°C; 2°F 2.0°C; 2°F 2.0°C; 2°F 2.0°C; 2°F
Minimum Set Point limit
-55C to Set Point;
-67°F to Set Point -50.0°C;
-58°F -50.0°C;
-58°F -50.0°C;
-58°F -50.0°C;
-58°F -50.0°C;
-58°F -50.0°C;
-58°F -50.0°C;
-58°F
Maximum Set Point limit
Set Point to 150C;
Set Point to 302°F 50.0°C;
122°F 50.0°C; 122°F 50.0°C; 122°F 50.0°C;
122°F 50.0°C; 122°F 50.0°C; 122°F 50.0°C;
122°F
Anti-short cycle delay
0 to 50 min 1 1 1 1 1 1 0
Second compressor start delay
0 to 255sec 2 2 2 2 2
Temperature alarm configuration
0 = Relative to Set Point;
1 = Absolute 1 1 1 1 1 1 1
High temperature alarm
0 to 50C (Rel); ALL to 150C (Abs);
0 to 90F (Rel); ALL to 302C (Abs) 50.0°C;
122°F 50.0°C; 122°F 50.0°C; 122°F 50.0°C;
122°F 50.0°C; 122°F 50.0°C; 122°F 50.0°C;
122°F
Low temperature alarm
0 to 50C (Rel); -55C to ALU (Abs);
0 to 90C (Rel); -67C to ALU (Abs) -50.0°C;
-58°F -50.0°C;
-58°F -50.0°C;
-58°F -50.0°C;
-58°F -50.0°C;
-58°F -50.0°C;
-58°F -50.0°C;
-58°F
Temperature alarm delay
0 to 255min 15 15 15 15 15 15 15
Delay of temperature alarm at start
up
0 to 720min 90 90 90 90 90 90 90
Outputs activation delay at start up
0 to 255min 0 0 0 0 0 0 0
Thermostat override
0 to 990 min 0 0 0 0 0
Set point for continuous cycle
-55 to 150°C;
-67 to 302°F 2.0°C; 36°F 2.0°C; 36°F 2.0°C; 36°F 2.0°C; 36°F 2.0°C; 36°F
Defrost delay after thermostat
override
0 to 255 min 2 2 2 2 2
Interval between defrosts
1 to 250 hours 4 6 6 6 6
Delay start of defrost
0 to 255 min 0 0 0 0 0
Maximum duration of defrost
0 to 255min 15 15 30 30 30

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Description Label Adjustment Range Factory defaults with parameter “tC” 1- 7
Defrost termination temperature
-55 to 50C;
-67 to 122°F 8.0°C
46°F 8.0°C 46°F 8.0°C 46°F 8.0°C 46°F 8.0°C 46°F
Maximum duration of defrost
(second evaporator)
0 to 255 min 30
Defrost termination temperature
(second evaporator)
-55 to 50C;
-67 to 122°F 8.0°C
46°F
Display during defrost
0 = Real temp.
1 = Temp. at defrost start
2 = Set Point
3 = “DEF” label
4 = “DEG” label
3 3 3 3 3
Defrost display time out
0 to 255 min 10 10 10 10 10
Defrost type (forced)
0 = Electrical
1 = Hot Gas 0 0 0 0
Drain down time
0 to 255 min 0 0 2 2
First defrost after power on
1 = Immediate
0 = After normal interval 0 0 0 0 0
Evaporator fan operating mode
0 to 3
(1 = Fan always on apart from during
defrost. See section 10 for info. on other
settings )
1 1
Evaporator fan stop temperature
-55 to 50C;
-67 to 122°F 25°C;
77°F 25°C; 77°F
Evaporator fan delay after defrost 0 to 255 min 7 7
Fan ON time
0 to 15 min 0 0
Fan Off time
0 to 15 min 0 0
Thermostat probe calibration
-12.0 to 12.0C;
-21 to 21F 0.0°C;
0°F 0.0°C; 0°F 0.0°C; 0°F 0.0°C; 0°F 0.0°C; 0°F 0.0°C; 0°F 0.0°C; 0°F
Evaporator probe presence
0 = evaporator probe not present
1 = evaporator probe present 1 1 1
Evaporator probe calibration
-12.0 to 12.0C;
-21 to 21F 0.0°C;
0°F 0.0°C; 0°F 0.0°C; 0°F
Third probe presence
0 = third probe not present,
1 = third probe present. 1 1 1 1 1 1
Third probe calibration
-12.0 to 12.0C;
-21 to 21F 0.0°C;
0°F 0.0°C; 0°F 0.0°C; 0°F 0.0°C; 0°F 0.0°C; 0°F 0.0°C; 0°F
Display Resolution
0 = With decimal point
1 = No decimal point 0 0 0 0 0 0 0
Temperature measurement unit
(°C/°F)
0 = Celsius
1 = Fahrenheit 0 0 0 0 0 0 0
Instrument display
0 = Thermostat probe
1 = Evaporator probe
2 = Third probe
3 = SET-POINT
0 0 0 0 0 0 0
Display delay
0 to 20min0sec, res. 10sec 0 0 0 0 0 0 0
Type of action
0 = cooling
1 = heating 0 0
Compressor ON time with faulty
probe
0 to 255min 15 15 15 15 15 15 0
Compressor OFF time with faulty
probe
0 to 255min 30 30 30 30 30 30 30
Alarm muting configuration for
buzzer & relay
0 = Mute buzzer only
1 = Mute buzzer & relay 1 1 1 1 1 1 1
Digital input configuration
0 = Start defrost
1 = Door switch
2 = Auxiliaryrelay
3 = Energysaving
4 = Remote On/OFF
5 = Generic alarm
6 = Serious alarm
5 5 5 5 5 5 5

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Description Label Adjustment Range Factory defaults with parameter “tC” 1- 7
Digital input polarity
0 = Closed circuit
1 = Open circuit 0 0 0 0 0 0 0
Second Digital input configuration
0 = Start defrost
1 = Door switch
2 = Auxiliaryrelay
3 = Energysaving
4 = Remote On/OFF
5 = Generic alarm
6 = Serious alarm
5 5 5 5 5 5
Second Digital input polarity
0 = Closed circuit
1 = Open circuit 0 0 0 0 0 0
Digital input 1 delay
0 to 255min 0 0 0 0 0 0 0
Digital input 2 delay
0 to 255min 0 0 0 0 0 0 0
Door open – compressor / fan status
0 = No change
1 = Fan off
2 = Compressor off
3 = Compressor & Fan off
0 0 0 0 0 0 0
Configuration of 4th relay
0 = Alarmrelay
1 = Heater relay(for NeutralZone)
2 = Auxiliaryrelay
3 = Second compressor relay
4 = Light output
5 = Second defrost output
0 0 0 0 0 0
Alarm relay polarity
0 = [11 -12] closed with alarm
1 = [11 -12] open with alarm 0 0 0 0 0 0
Exclude temperature alarm - door
open
0 to 255min 20 20 20 20 20 20 20
Restart regulation with door open
alarm
0 = No
1 = Yes 0 0 0 0 0 0 0
Low temperature alarm of condenser
-55 to 150°C;
-67 to 302°F -40°C; -40°F -40°C; -40°F -40°C; -40°F -40°C; -40°F -40°C; -40°F
High temperature alarm of condenser
-55 to 150°C;
-67 to 302°F 110°C; 230°F 110°C; 230°F 110°C; 230°F 110°C; 230°F 110°C; 230°F
Differential for temperature
condenser alarm recovery
0.1 to 25.5°C;
1 to 45°F 5°C; 5°F 5°C; 5°F 5°C; 5°F 5°C; 5°F 5°C; 5°F
Condenser temperature alarm delay
0 to 254min, 255= nU 15 15 15 15 15
Condenser temperature alarm
exclusion at start up
0 to 720min, res.10min 90 90 90 90 90
Compressor off with low temperature
alarm of condenser
0 = No
1 = Yes 0 0 0 0 0
Compressor off with high
temperature alarm of condenser
0 = No
1 = Yes 0 0 0 0 0
Temperature deviation from normal
Set Point during Energy Saving
-30.0 to 30°C;
-54 to 54°F 0°C; 0°F 0°C; 0°F 0°C; 0°F 0°C; 0°F 0°C; 0°F 0°C; 0°F 0°C; 0°F
ON / OFF key enabling
0 = Disabled
1 = Enabled
2 = Energysaving 0 0 0 0 0 0 0
Buzzer enabling
0 = Disabled
1 = Enabled 1 1 1 1 1 1 1
Parameter table
For factoryuse only - - - - - - -
Software release number
Readonly - - - - - - -
Evaporator probe temperature Read only - - -
Third probe temperature
Readonly - - - - - -
READ ON IF YOU NEED MORE DETAIL

1592031000 Univ-R4 GB - r1.1 - 2012.07.23 Universal-R 10/20
7. PARAMETERS – THEIR FUNCTIONS IN DETAIL
Table 4: controller parameters in detail
Display visualisation Description
Type of Controller: tells the Universal-UDS which type of controller it will be operating as.
1= on/off refrigeration thermostat – 1 relay& 1 probe;
2= Combined thermostat with off cycle defrost timer – 1 relay& 1 probe;
3= Combined thermostat with time initiated & time terminated defrost – 2 relays & 1 probe;
4= Combined thermostat with time initiated & temperature terminated defrost – 2 relays & 2 probes;
5= Combined thermostat with time initiated, temperature terminated defrost + evaporator fan control with delay after
defrost – 3 relays & 2 probes;
6= Double evaporator operations: combined thermostat with time initiated, temperatures terminated defrost + evaporator
fans control with delay after defrost – 3 relays & 3 probes;
7= on/off heating thermostat – 1 relay& 1 probe.
Probe Type: configures the controller to work with PTC or NTC probes.
0 = PTC,
1 = NTC.
Differential: (0.2°C to 12.0°C) sets the degrees above Set Point at which the compressor cuts in.
Note: when tC = 7 (heating applications) the tC value is automatically set below the Set Point. If the temperature decreases
and reaches set point minus differential the regulation output is activated and then turned off when the temperature reaches the
set point valueagain.
Minimum set point limit: (-55°C to SET or -67°F to SET) sets thelower limit of set point adjustment.
Maximum set point limit: (SET to 150°C or SET to 302°F) sets theupper limit of set point adjustment.
Anti-short cycle delay: (0 to 50min) minimum interval between the compressor stop and the next possible restart.
Second compressor start delay: (0 to 255sec)
Temperature alarm configuration:
0 = Related to Set Point;
1= Absolute.
Note: Related means alarms are linked to the Set Point andwill follow it if it isadjusted. In this case ALU & ALL set degrees
over & under Set Point for alarm. Absolute means ALU & ALL will set fixed alarm temperatures, which are not affected by
anySet Point adjustment.
High temperature alarm:
ALC = 0 → [0 to 50°C] or [0 to 90°F];
ALC = 1 → [ALL to 150°C] or [ALL to 302°F].
Low temperature alarm:
ALC = 0 → [0 to 50°C] or [0 to 90°F];
ALC = 1 → [-55°C to ALU] or [-67 to ALU].
Temperature alarm delay: (0 to 255min) time interval between an alarm condition occurring and the alarm signalling.
Delay of temperature alarm at start-up: (from 0 to 720min; res. 10min) time delay of any temperature alarm during pull
down following “power on”.
Outputs activation delay at start up: (0 to 255min) time delaybefore anyoutput relayactivates following “power on”.

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Thermostat override: (0 to 990min; res. 10min) period during which the compressor will run continuously, irrespective of
temperature. Setting this parameter to 0inhibit this function.
Set point for continuous cycle: (-55 to 150 °C or -67 to 302°F) it sets the set point used during the continuous cycle.
Defrost delay after fast freezing: (0 to 255min) time interval between the end of the thermostat override period and the
start of the following defrost related to it.
Interval between defrosts: (0 to 255hours) time interval between the beginning of two consecutive defrosts.
Delay start of defrost: (0 to 255min) delay between reaching the defrost interval time (as defined byparameter idF) and the
defrost actually starting. Used to stagger defrosts between multiple systems.
(Maximum) duration of defrost: (0 to 255min) time duration of defrost when only one probe is in use, or defrost time out
override when second (evaporator) probe is in use. Set it to zero to disable defrost cycles.
Defrost termination temperature: (-55 to 50°C or -67 to 122°F) sets the defrost termination temperature. Measured by the
evaporator probe.
(Maximum) length for second defrost: (0 to 255min) when P3P = 0, (not evaporator probe: timed defrost) it sets the
defrost duration, when P3P = 1 (defrost end based on temperature) it sets the maximum length for defrost.
Note: The P3 probe will be automaticallyset as second evaporator probe bythe tC parameter.
Second termination temperature: (-55 to 50°C or -67 to 122°F) sets the temperature measured bythe second evaporator
probe (P3), which causes the end of defrost.
Display during defrost:
0= real temperature;
1 = temperatureat defrost start;
2 = set point;
3 = dEF label;
4= dEG label.
Defrost display time out: (0 to 250min) after a defrost, the controller will revert to current temperature display when the
temperature is back down within its normal working range, or after the time set in this parameter, whichever is the sooner.
Defrost type:
0 = electrical heater;
1= hot gas, compressor runs duringdefrost.
Drain down time: (0 to 255min) drain down time. Runs concurrentlywith Fnd (Fan delay after defrost time).
First defrost after power-on:
0= immediately;
1= after the idF interval time.
Fan operating mode:
0= cycles on/off with the compressor, OFF during defrost;
1 = continuous mode, OFF during defrost;
2 = cycles on/off with the compressor, ON during defrost;
3 = continuous mode, ON during defrost;
Fan stop temperature: (-55 to 50°C or -67 to 122°F) temperature above which the evaporator fan stops (during thenormal
refrigeration cycle).

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Fan delay after defrost: (0 to 255min) the time interval between end of defrost and evaporator fans starting. Runs
concurrentlywith Fdt (Drain down time). Always keep Fnd longer that Fdt.
Fan ON time: (0 to 15min) used to set an On/Off cycle of the evaporator fans while the compressor is off. With FnC = 0 or
FnC = 2, it sets the evaporator fan ON cycling time when the compressor is OFF. With Fon = 0 and FoF ≠ 0, the fans are
always off. With Fon = 0 and FoF = 0 the fans are always off.
Fan OFF time: (0 to 15min) used to set an On/Off cycle of the evaporator fans while the compressor is off. With FnC = 0 or
FnC = 2, it sets the evaporator fan OFF cycling time when the compressor is OFF. With Fon = 0 and FoF ≠ 0, the fans are
always off. With Fon = 0 and FoF = 0 the fans are always off.
Thermostat probe calibration: (-12.0 to 12.0°C or -21 to 21°F) adjustment for thermostat probe (named Room) offset.
Evaporator probe presence (probe named Evap on the label):
0 = not present;
1 = present.
Evaporator probe calibration: (-12.0 to 12.0°C or -21 to21°F) adjustment for evaporator probe(named Evap) offset.
Third probe presence (probe named Evap.2 on the label):
0 = not present, the third input (the one signed with label “D.I.2 / Pb3”) Input operates as digital input;
1 = present, the third input (the one signed with label “D.I.2 / Pb3”) Input operates as third probe.
Third probe calibration: (-12.0 to 12.0°C or -21 to 21°F) adjustment for third probe (named Evap.2 on the label) offset.
Display resolution:
0= with decimal point;
1= without decimal point.
Temperature measurement unit:
0= Celsius;
1 = Fahrenheit.
Warning: If you alter the setting of parameter rES ( decimal point on/off ) re-check the settings of all temperature related
parameters Set Point, HY, LS, US, ALU, ALL, dtE, FSt, ot & oE, as theycan be effected.
Probe for Display:
0 = Thermostat probe;
1 = Evaporator probe;
2 = Third probe;
3 = DISPLAY ONLY SHOWSTHE SET-POINT.
Display delay: (0 ÷ 20min0sec; resolution 10 sec) when the temperature increases, the display is updated of 1°C or 1°F
after this time.
Type of action: 0 = cooling; 1 = heating.
Compressor ON time with faulty probe: (0 to 255min) If there is a P1 probe failure the controller will automaticallycycle
the compressor on/off according to Con & CoF to maintain basic cooling. Con is thecompressor “ON” time.
Compressor OFF time with faulty probe: (0 to 255min) If there is a P1 probe failure the controller will automaticallycycle
the compressor on/off according to Con & CoF to maintain basic cooling. CoF is thecompressor “OFF” time.
Alarm muting:
0= Alarmrelayremains active when alarm buzzer is muted;
1= Alarmrelayis cancelled when alarmbuzzer is muted.

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Digital input operating mode: configures the digital input function:
0 = Starts a defrost;
1 = Input from a door switch (see parameter odC);
2 = Activates the auxiliaryrelay;
3 = Starts EnergySaving(Control Point becomesSet Point +/- valuein HES);
4 = Remote On/OFF (puts the controller into standby);
5 = Generic external alarm (normal regulation continues);
6 = Serious externalalarm (regulation is stopped).
Configurable digital input polarity:
0= the digital input is activated byclosing the circuit;
1= the digital input is activated byopening the circuit.
Second digital input operating mode: configures the second digital input function:
0 = Starts a defrost;
1 = Input from a door switch (see parameter odC);
2 = Activates the auxiliaryrelay;
3 = Starts EnergySaving(Control Point becomesSet Point +/- valuein HES);
4 = Remote On/OFF (puts the controller into standby);
5 = Generic external alarm (normal regulation continues);
6 = Serious externalalarm (regulation is stopped).
Configurable second digital input polarity:
0= the digital input is activated byclosing the circuit;
1= the digital input is activated byopening the circuit.
Time interval/delay for digital input 1 alarm: (0 to 255min) it defines the time delay between the detection and the
subsequent signalling of the alarm.
Time interval/delay for digital input 2 alarm: (0 to 255min) it defines the time delay between the detection and the
subsequent signalling of the alarm.
Compressor and fan status when open door:
0= normal;
1= Fan OFF;
2= Compressor OFF;
3= Compressor and fan OFF.
Auxiliary relay configuration:
0= Alarm;
1= Dead Band;
2= Auxiliary;
3 = Second compressor output;
4 = Light output;
5= Second defrost output.
Alarm relay polarity:
0= contact [13 – 14] closed with alarm;
1= contact [13 – 14] open with alarm.
Temperature alarm exclusion with door open: 0 to 255min.
Regulation restart with door open alarm:
0= no;
1= yes, regulationwillrestart after “door open” alarms.
Low temperature alarm of condenser: (-55 to 150°C or -67 to 302°F) when this temperature is reached, the HA2 alarm
will be raised (after the Ad2 delaytime has expired).
High temperature alarm of condenser: (-55 to 150°C or -67 to 302°F) when this temperature is reached, the LA2 alarm
will be raised (after the Ad2 delaytime has expired).
Differential for temperature condenser alarm recovery: 0.1 to 25.5°C or 1 to 45°F.

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Condenser temperature alarm delay: (0 to 255min) time interval between the detection of an alarm condition at the
condenser and the relative alarm signalling.
Condenser temperature alarm exclusion during start-up: (0 to 720min, resolution 10min).
Compressor off when a low temperature alarm of the condenser is active:
0 = the compressor keeps on working if a low temperature alarmat the condenser is active;
1 = the compressor is switched off while the low temperature alarm is active. The regulation will restart after elapsing AC
delaytime.
Compressor off when an high temperature alarm of the condenser is active:
0 = the compressor keeps on working if a low temperature alarmat the condenser is active;
1 = the compressor is switched off while the low temperature alarm is active. The regulation will restart after elapsing AC
delaytime.
Temperature set point change during the Energy Saving cycle: (-30.0 to 30.0°C or -54 to 54°F) sets the deviation
from the normal set point during the EnergySaving cycle.
ON / OFF key enabling:
0= keyfunctionalitydisabled;
1= On Off function enabled;
2 = EnergySaving function enabled.
Buzzer enabling:
0= disabled;
1= enabled.
Parameter table: read only – for factoryuse.
Software release: read only– shows the software release.
Evaporator probe: shows the current temperature sensed by the evaporator probe.
Third probe temperature: shows the current temperature sensed by the third probe.

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8. BUTTONS AND THEIR FUNCTIONS
8.1 SINGLE BUTTON FUNCTIONS
Table 5: single button functions
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 button pressed for 3 s to start a manual defrost cycle. The defrost icon willilluminate. (Not possible if parameter tC
= 1 or 7).
Display current set point: after pressing and releasing this button, the set point willbe 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 bythe small led’s
flashing. Change the set point using the UP and DOWN buttons. The new value can be stored either bypressing SET button (the instrument
restores temperature display) or bywaiting 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 displayed value.
(DOWN): to see the min stored temperature; in programming mode it browses the parameter codes or decreases the displayed value.
Keep press 3sec just after powering on the device (and within the first 60sec) to start automatic probe recognising.
Keep pressed 2 sec to switch the instrument off when the parameter onF = 1.
8.2 BUTTON COMBINATION FUNCTIONS
Table 6: button combination functions
COMBINATION FUNCTION
+
Lock & 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.
+
Enter programming mode: keep both buttons pressed for 3 sec, release themand then press them again for 8 sec.
The first label of Pr2 level will be displayed.
+
Exit programming mode: press together to return to normal display.
9. PROGRAMMING MODE
9.1 USER PROGRAMMING LEVEL – PR1
To enter programming level Pr1 (user programming level), keep both SET and DOWN buttons pressed for 3 sec. The first parameter
label will appear. Browse parameter list by using the UP or DOWN keys. Press SET to see a parameter’s current value and UP or
DOWN keys to alter its value. Press SET to confirm change (the display will blink for 3 sec and then the next parameter willappear) or
bywaiting for the menu timeout to expire (15 sec). If no parameter is available for changes in Pr1 level, a noP labelwillbe show.
9.1 PROTECTED PROGRAMMING LEVEL – PR2 (ALL VISIBLE PARAMETERS CAN BE FOUND HERE)
First enter Pr1 level (as described above) then with any parameter label displayed keep both SET and DOWN buttons pressed for 8
sec. The first parameter label will appear. Browse parameter list by using the UP or DOWN keys. Press SET to see a parameter’s
current value and UP or DOWN keys to alter its value. Press SET to confirm change (the display will blink for 3 sec and then the next
parameter willappear) 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 SET & DOWN while its label is
displayed. Accessibility of anyparticular parameter via Pr1 level is confirmed by the alarm LED lighting up while its labelis 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
displaymode.

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10. OTHER FEATURES OF THE UNIVERSAL-R
As well as the main digitaldisplay, there are some smallicons on
the front panel. These are used to monitor the loads controlled by
the instrument. Each icon function is described in the following
table.
Table 7: display signalling description
ICON FUNCTION MEANING
ON Light (AUX) output enabled.
ON Cooling enabled.
FLASHING Anti-short cycle delayin progress.
ON Fan enabled.
FLASHING Delaytime on fan activation is running (Fnd > 0)
ON Defrost in progress.
FLASHING Drip time in progress (Fdt > 0) or delayon start defrosting is running (dSd > 0).
ON Auxiliaryoutput activated.
ON EnergySaving activated.
ON Thermostat override enabled.
ON ALARM signal: when in programming mode and in Pr2 level, this icon 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.
11. THERMOSTAT OVERRIDE ( 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 manuallybypressing the UP button again for about 3 seconds.
12. DEFROST TYPES
tC parameter value Action
1 or 7 No defrost
2 Off cycle defrost bytimer
3, 4, 5 or 6 Forcedtype of defrost: Electricalor Hot Gas
-tdF = 0: defrost is electrical;
-tdF = 1: defrost is byhot gas.
13. EVAPORATOR FAN CONTROL (only when parameter tC = 5 or 6)
The fan control mode is selected by means of the “FnC”parameter:
FnC parameter 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 Willswitch ON and OFF with the compressor and be on during defrost cycle (*).
3 Fans will run continuously and be on during defrost cycle (*).
(*) Note: Fans will stop if the temperature value set in parameter “FSt”is exceeded.

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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 untilFnd (fan delay) times out.
14. SPECIAL APPLICATIONS – DEAD BAND CONTROL
14.1 DEAD BAND CONTROL (COOLING & HEATING)
With [oAC = 1], the compressor relay controls cooling as normalbut the 4th (auxiliary) relay is used to controla heater. The value entered in
parameter HY will now be set equal on both sides of the SET POINT. Example: if [HY = 1°C] that willcreate a 2°C Dead Band.
At [SET POINT + HY], cooling switches on. At [SET POINT – HY], heating switches on. Either cooling or heating switch off when
temperature returns to SET POINT.
15. ALARMS
Message
Message – Mode Cause Outputs
EE Flashing Data or memoryfailure Alarm output ON; Other outputs unchanged.
P1 Flashing Thermostat probe failure Alarm output ON; Compressor output according toparameters Con
and CoF.
P2 Alternating with roomtemperature Evaporator probe failure Alarm output ON; Other outputs unchanged; End defrost is timed.
P3 Alternating with roomtemperature Second evaporator probe failure Alarm output ON; Other outputs unchanged; End defrost is timed.
HA Alternating with roomtemperature High temperature alarm Alarm output ON; Other outputs unchanged.
LA Alternating with roomtemperature Minimumtemperature alarm Alarm output ON; Other outputs unchanged.
HA2 Alternating with roomtemperature Condenser max temp alarm Alarm output ON; Other outputs unchanged.
LA2 Alternating with roomtemperature Condenser max temp alarm Alarmoutput ON; Other outputs unchanged.
dA Alternatingwithroomtemperature Door open alarm Alarmoutput ON: Outputs re-start if parameter rrd = 1.
EA Alternating with roomtemperature Generic external alarm Alarm output ON; Other outputs unchanged.
bAL Alternating with roomtemperature Serious external alarm Alarm output ON; Other outputs OFF.
15.1 MUTING ALARM BUZZER & RELAY
The alarm buzzer can be muted, by pressing any button. The controller will briefly show the reset “rES” label. Parameter tbA defines how
the alarm relay will respond to the muting of the buzzer.
-tbA = 0: the alarm relay willremain active untilthe alarm condition is rectified;
-tbA = 1: the alarm relay de-activates when the buzzer is muted.
In either case, the displaywillflash an alarm labeluntilthe condition is rectified.
15.2 ALARM “EE”
The Dixell Universal-R is provided with an internal watchdog verifying data and memory integrity. Alarm “EE” will flash after detecting a
failure in data or in the internalmemory. In this case, the alarm output is enabled.
WHAT TO DO
1. Cancelthe alarm bypressing a key.
2. Check the value of all parameters and restore correct values when wrong.
3. Check the correct instrument operation and in case of further errors replace it.
15.3 ALARM RECOVERY
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 normaloperation. 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”automaticallystop as soon as the condenser temperature returns to normalvalues.
16. REMOVING SECURITY LEVEL PROTECTION
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 SET and DOWN buttons in quick succession. The decimal point LED will be on indicating that
access to this particular parameter is now possible from Pr1 level. Its labelwill now appear when in Pr1 programming leveland its value can
be altered. To restore security levelprotection, use the same procedure (the decimalpoint LED will go out after pressing both buttons).

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17. MOUNTING
The Universal-R should be mounted in a panel, in a 29 x 71 mm hole, and fixed using the special brackets supplied. Ambient temperature
for correct operation is 0 to 50°C. Avoid places subject to strong vibrations, corrosive gases, excessive dirt or humidity (20 to 85% non-
condensing RH is the recommended working range). Make sure air can freely circulate through the cooling holes slots at the rear side of
the controller.
18. ELECTRICAL CONNECTIONS
The instrument is provided with screw terminal block to connect cables with a cross section up to 2.5 mm2. Before connecting cables make
sure the power supply complies with the instrument’s requirements. Separate the probe cables from the power supply cables, from the
outputs and from the power connections. Do not exceed the maximum current rating for each relay; in case of heavier loads use a suitable
externalrelay.
19. PROBES
It is recommended to place the thermostat probe away from rapid air streams to correctly measure the average room temperature. Place
the defrost termination probe among the evaporator fins in the coldest place, where most ice is formed, far from heaters or from the
warmest place during defrost, to prevent premature defrost termination.
20. TECHNICAL DATA
Housing: Self extinguishing ABS
Size: Frontal32x74 mm; depth 70 mm
Mounting: Panelmounting in a 71x29 mm panelcut-out
Frontal protection: IP65
Connections: Screw terminalblock 2.5 mm2wiring
Power supply: 12Vac/dc, -10% +15%
230Vac, -10% +15%
Power absorption: 4 VA max
Display: 3 digits, red LED, 14.2 mm high
Inputs: a maximum of 3 temperature probes, PTC or NTC type.
Probes (supplied): 2 x NTC, range [-40 to 105°C] with 2 metre cables
Relay outputs: Amps Resistive (Inductive)
Compressor: SPDT relay 8(3) A, 250Vac
Defrost: SPDT relay 8(3) A, 250Vac
Fans: SPST relay 7(2) A, 250Vac
Alarm: SPDT relay 8(3) A, 250Vac
Other output: Buzzer for acoustic signalling of alarms
Data storing: Non-volatile memory (EEPROM)
Ambient temperature: 0 to 50°C (32 to 122°F)
Ambient humidity: 20 to 85% (no condensing)
Storage temperature: -30 to 85°C (-22 to 185°F)
Operating range: PTC: -50 to 150°C (-58 to 302°F); NTC: -50 to 110°C (-58 to 230°F)
Resolution: 0.1°C or 1°F (selectable)
Accuracy at 25°C: (range -40 to 50°C) 0.5 °C 1 digit

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21. FAULT FINDING
Problem Possible reason Notes
Display flashing HA Temperature too high. Check cooling system.
Check alarmsettings.
Display flashing LA Temperature too low. Check cooling system.
Check alarmsettings.
Display flashing HA2 Condenser temperature too high. Check condenser cooling system.
Check alarmsettings.
Display flashing LA2 Condenser temperature too low. Check condenser cooling system.
Check alarmsettings.
Display flashing P1 Fault withthermostat probe.
Wrong type of probe fitted (NTC/PTC).
Check probe connections and resistance value.
Change probe type or alter parameter PbC.
Display flashing P2
Fault with evaporator probe.
Wrong type of probe fitted (NTC/PTC).
Parameter tC has been set to 4, 5 or 6
without evaporator probe fitted.
Check probe connections and resistance value.
Change probe type or alter parameter PbC.
Fit evaporator probeor alter parameter tC.
Display flashing P3
Fault with third probe.
Wrong type of probe fitted (NTC/PTC).
Parameter tC has been set to 6 without
third probe fitted.
Check probe connections and resistance value.
Change probe type or alter parameter PbC.
Fit evaporator probeor alter parameter tC.
Display flashing EE Data corruption.
Check for electrical spikes andinterference. Fit filters DIXL930 &
DIXL932. Ensure probe cables are separated frompower cables.
Re-check all parameter settings. Replace controller if still not
working.
Display flashing dA Door has been left open too long. Shut the door.
Display flashing EA A non serious external alarm has been detected
bythe digital input. Trace and rectify the external problem.
Display flashing bAL A serious external alarmhas been detected by
the digital input. Trace and rectify the external problem.
Buttons will not work Buttons have been locked. Unlock buttons bypressing both UP & DOWN buttons until display
flashes Pon.
Parameter cannot be adjusted
over its full range Some other parameter is conflicting and preventing further adjustment. Check other parameter settings.
Power on but no output operates
Small LED’s flashing Anti short cycle delay in progress, all relays being held off until it expires. Wait or adjust parameters AC or odS.
Evaporator fan short cycling Parameter FSt set too low. Adjust FSt to a higher setting. During commissioning, set it above ambient until pulldown is complete, then re-set to a more suitable
temperature.

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