Lae electronic Mp1 series User manual

Thank you for having chosen an LAE electronic product. Before installing the instrument, please read this instruction booklet carefully in order to

ensure safe installation and optimum performance.

1. INSTALLATION

1.1 The MP1-15, size 77x35x77 mm (WxHxD), is inserted into the panel through a hole measuring 71x29 mm and is fixed by means

of the suitable clips, by pressing gently. If fitted, check that the rubber gasket adheres to the panel perfectly, in order to prevent debris

and moisture infiltration to the back of the instrument.

1.2 The instrument should work with room temperatures between -10°.. +50°C and relative humidity between 15%.. 80% inclusive.

Supply voltage, switched powers and connection set-up should scrupulously comply with the indications given on the container. To

reduce the effects of electromagnetic disturbance, keep the sensor and signal cables well separate from the power wires.

1.3 The sensor T1 measures the air temperature and activates in the thermostat control cycle; it should be placed inside the appliance

in a point that truly represents the temperature of the stored product. If fitted and enabled, (T2=YES), the sensor T2 measures the

evaporator temperature, and should be placed where there is the maximum formation of frost.

CAUTION

: should the relays have to switch a heavy load frequently, it is advisable to contact the manufacturer for indications on the lifetime of

the contacts.

Whenever products must be kept within very severe specifications or the products have considerable value, the use of a second instrument is

recommended, which activates upon or warns of any malfunction.

2. OPERATING MODES

Upon switching on, just the central line (autotest) appears on the display for approximately three seconds and the subsequent

indications depend on the operating status of the controller. TABLE 1 gives the indications associated with the various states, whereas

the symbols appearing below are explained in TABLE 2.

2.1 STANDBY.If button is pressed for 3 seconds, it allows the MP1-15 to be put on a standby, or to resume output control (with

parameter SB=YES only). An indication on the display shows that the outputs are off permanently.

2.2 NORMAL.During normal operation, the display shows the temperature measured by probe T1, presented in the most appropriate

manner. Through parameter SCL you select the display range according to the table below:

OFF

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INSTRUCTIONS FOR INSTALLATION AND USE.

MP1

0LMP1001EN

STANDBY NORMAL INFO MENU INFO DATA SETUP MENU PARAMETER

VALUE

OFF -19 T1 -20 SCL 1°C

Not Product

Air Display scale

Operating Temper. (sim.)

temperature

DEF T2 -25 SPL -25

Defrost Evaporator Minimum

temperature setpoint

REC - - - - - - SPH -18

Recovery after .... Maximum

defrost setpoint

HI TLO -1.9 - - - - - -

High temperature Min. stored ....

alarm temperature

- - - CND 15 - - - - - -

.... Condenser clean ....

cycle

E1 LOC NO - - - - - -

Faulty T1 probe Locked keypad

TABLE 1

SCL 1°C (only with INP=SN4) 2°C °F

RANGE -50/-9.9.. +19.9/+80 -50.. +120 -55.. +240

The temperature measured by probe T1 may be corrected with a fixed offset by assigning a value other than 0 to the parameter OS1.

Also probe T2 may be corrected with a fixed offset, in this case parameter OS2. Additionally, prior to display, the temperature is

treated by an algorithm that allows the simulation of a thermal mass directly proportional to the SIM value. The result is a reduction in

the fluctuation of the displayed value.

2.3 INFO MENU. Pressing the button and releasing it immediately activates the information selection menu. From this menu you

can display the instantaneous temperatures T1 and T2; the maximum (THI) and minimum (TLO) stored temperature; the total operating

time of the condenser since its last cleaning (CND) and the keypad status (LOC). The information to be displayed can be selected

sequentially, by pressing repeatedly or quickly via the buttons and to scroll through the menu. Exit from the info menu is by

pressing button or automatic after 6 seconds of not using the keypad.

In the operating mode it’s also possible to reset the recordings THI and TLO and the hour counter CND by pressing buttons

+ simultaneously while the value is displayed.

2.4 SETPOINT.The setpoint value is displayed by pressing and keeping button pressed for at least half second. The value is

programmed by pressing buttons + or within the minimum limit SPL and the maximum limit SPH. When the button is

released, the newly programmed value is stored. The actual setpoint, minimum and maximum setpoint limits depend on the selection

active when the operation is performed.

2.5 KEYPAD LOCK.The keypad lock avoids undesired, potentially dangerous operations, which might be attempted when the

controllers is operating in a public place. In the INFO mode, through the buttons and it’s possible to assign YES or NO to the

parameter LOC. With LOC=YES all keypad commands are inhibited. To resume normal operation of keypad, adjust setting so that

LOC=NO.

2.6 DEFROSTING. By assigning a value grater than 0 to the parameter DDY, during defrost the indication is displayed instead

of the temperature. In this case, after defrost and for the time programmed in DDY, the display indication shows that the normal

thermostatic cycle is being resumed.

2.7 ALARM. An anomaly in the operation is displayed through the lighting up of an abbreviation showing its cause: / high/low

alarm temperature in the cabinet, door open, periodic condenser cleaning, / fault of probe T1 / T2.

2.8 SETUP.The setup is accessed by pressing the buttons + in succession and keeping them pressed simultaneously for 5

seconds. The available parameters appear in TABLE 2 as shown below.

3. CONFIGURATION

The controller is configured for the system to be controlled by programming the operating parameters, that is, through the setup (see par.

2.8). In SETUP, press button to pass from one parameter to the next, and press button to go back. To display the value of a

parameter press , to modify it press buttons + or simultaneously. Exit from the setup is by pressing button or automatic

after 30 seconds of not using the keypad.

Table 2

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INSTRUCTIONS FOR INSTALLATION AND USE.

Par. Adjustment Function Sect.

SCL 1°C/2°C/°F Readout scale 2.2

SPL -50.. SPH [°] Minimum temperature set point 2.4

SPH SPL.. +120 [°] Maximum temperature set point 2.4

SP SPL.. SPH [°] Effective temperature set point 4.1

C-H REF/HEA Refrigerating/Heating selection 4.1

HYS +1.. +100 [°] Thermostat hysteresis 4.1

CRT 0.. 30 [min] Compressor rest time 4.1

CT1 0.. 30 [min] Compressor run with sensor T1 failure 4.2

CT2 0.. 30 [min] Compressor stop with sensor T1 failure 4.2

CSD 0.. 30 [min] Compressor stop delay from door opening 4.3

DFR 0.. 24 Defrost frequency /24h 5.1

DLI -50.. +120 [°] Defrost end temperature 5.3

DTO 1.. 120 [min] Maximum defrosting duration 5.3

DTY OFF/ELE/GAS Defrost type 5.2

DRN 0.. 30 [min] Drain down time 5.2

DDY 0.. 60 [min] Defrost display control 2.6

FID YES/NO Fans active during defrost 6.3

FDD -50.. +120 [°] Fan re-start delay temperature 6.4

FTC YES/NO Evaporator fan timed control 6.1

FT1 0.. 180 [sec] Fan stop delay 6.1

FT2 0.. 30 [min] Timed fan stop 6.1

FT3 0.. 30 [min] Timed fan run 6.1

Par. Adjustment Function Sect.

ATL -120.. 0 [°] Low alarm differential 7.1

ATH 0.. +120 [°] High alarm differential 7.1

ATD 0.. 120 [min] Alarm temperature delay 7.1

ADO 0.. 30 [min] Door alarm delay 7.2

ACC 0.. 52 [weeks] Periodic condenser cleaning 7.3

IISM

NON/MAN

2nd set switching mode 9.1

IISL -50.. IISH [°] Minimum 2nd temperature set 2.4

IISH IISL.. +120 [°] Maximum 2nd temperature set 2.4

IISP IISL.. IISH [°] Effective 2nd temperature set 4.1

IIHY +1.. +100 [°] Hysteresis of 2nd temperature set 4.1

IIDF 0.. 24 Defrost frequency /24h In mode 2 5.1

IIFT YES/NO Evaporator fan timed control in mode 2 6.1

SB YES/NO Button enabling 2.1

DS YES/NO Door switch enabling 7.2

INP SN4/ST1 NTC/PTC probe selection 9.2

OS1 -125.. +125 [°] probe T1 offset 2.2

T2 YES/NO Probe T2 enabling 1.3

OS2 -125.. +125 [°] Probe T2 offset 2.2

TLD 1.. 30 [min] Delay for min./max. temperature storage 8

SIM 0.. 100 Display slowdown 2.2

ADR 0.. 255 Not active - -

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*CAUTION

: upon changing the display scale SCL, it is

ESSENTIAL

to reconfigure the parameters related to the absolute (SPL, SPH, SP, etc.)

and differential (HYS, ATL, ATH, etc.) temperatures.

4. THERMOSTAT CONTROL

4.1 Thermostat control is based on comparing the temperature T1, the set point *SP and the hysteresis *HYS, in the control mode

determined by parameter C-H. With C-H you choose refrigerating (REF) or heating (HEA) control mode. In order to understand control

modes better, please read the following example:

C-H=REF: with SP=2.0 and HYS=1.5, the compressor will be Off with T1= +2.0° and On with T1= +3.5° (2+1.5).

C-H=HEA: with SP=75 and HYS=3, the heater will be Off with T1= +75° and On with T1=72° (75-3).

The output only switches On again if the Off time period determined by CRT since the previous switchover has elapsed. Whenever a

very small hysteresis HYS must be maintained, it is advised that a suitable value for CRT is selected in order to reduce the number of

starts per hour.

4.2 If sensor T1 fails, the output is controlled by parameters CT1 and CT2 giving fixed On and Off times of the output.

Example: CT1=06, CT2=4, 6 minutes On, 4 minutes Off.

4.3 If door switch input control has been enabled (DS=YES), parameter CSD determines the delay between when the door is opened

and the compressor stopping.

* Actual setpoint and hysteresis depend on the selection I/II: in mode I, the reference parameters are SP and HYS while in mode II,

IISP and IIHY.

5. DEFROSTING

5.1 Defrosting starts automatically when necessary time has elapsed to obtain the defrosting frequency set with *DFR. For example,

with DFR=4 defrosting occurs once every 6 hours. The internal timer is set to zero at the power-up and at each subsequent defrost start.

When the controller is put on a standby, the accumulated time count is “frozen” (is not incremented).

Defrosting may also be induced manually by keeping the button pressed for 2 seconds.

With C-H=HEA, all defrost functions are inhibited; differently, with DFR=0, timed defrost only is removed.

5.2 Once defrost has started, the outputs are controlled according to parameter DTY as per the following table:

Table 3

5.3 Defrost lasts for the time DTO but, if the evaporator probe has been enabled (T2=YES) and temperature DLI is achieved before

this time elapses, defrost will be terminated in advance.

If parameter DRN is greater than 0, before cooling starts all outputs will remain off for the time assigned to DRN. This phase, called

drain down, will allow a complete ice melting and the drain of the resulting water.

* The actual defrost frequency depends on the selection I/II: in mode I, the reference parameter is DFR while in mode II it’s IIDF.

6. EVAPORATOR FANS

6.1 During termostatic control, the evaporator fans are controlled by parameters *FTC, FT1, FT2 and FT3.

With FTC=YES an optimised fan control is enabled; in other words the fans will work in conjunction with the compressor (heater), and

after the compressor has stopped, the fans remain on for the time FT1 (energy recovery), after that they will remain off for the time FT2

(energy saving). After FT2, the fans will be on for the time FT3 (whirling air stratifications).

Example: FT1=30, FT2=4, FT3=1. With those values the fans will cut-in together with the compressor and will stop 30 seconds after the

compressor has stopped; now, a 4 minute OFF and 1 minute ON cycle will take place till the compressor starts again.

With FT2=0 the fans will be on all the time; with FT2 greater than 0 and FT3=0 they will always be off.

With FTC=NO optimised fan control is excluded, therefore the fans will always be active.

6.2 If the MP1-15 is connected to a door switch and door switch control is enabled (DS=YES), during thermostatic control if the door

is opened, the fans will be stopped immediately.

6.3 During defrost, the fans are controlled by parameter FID; with FID=YES the fans remain on all through defrosting. With FID=NO,

INSTRUCTIONS FOR INSTALLATION AND USE.

DTY DEFROST COMPRESSOR

OFF Off Off

ELE On Off

GAS On On

the fans will be stopped and will only re-start after defrost, when the conditions in paragraph 6.4 have been met.

6.4 After defrosting, if probe T2 is active (T2=YES), temperature FDD provides evaporator fan re-start. So the evaporator fans will

remain off until the evaporator has a temperature higher than FDD. If such condition doesn’t occur within 4 minutes following defrost

termination, the fans will however be switched on again.

* The way the fans will be controlled depends on the selection I/II: in mode Ithey work according to FTC, while in mode II the fans

work according to IIFT.

7. ALARMS

With MP1-15, correct operation of the thermostat may be monitored by a wide range of functional and diagnostics alarms, individually

selectable by means of the relevant parameters. The alarm warnings are given on the display through explicit indications (see following

par.), and intermittent buzzer sounding. During an alarm, by pressing any button, the buzzer is muted. Then, if the alarm persists, the

buzzer will be periodically switched on for 20 seconds every 60 minutes, until the alarm ends (the display indications remain on all the

time). The repeated acoustic warning applies to all alarms with the exception of the condenser cleaning alarm. Operation of the various

elements is given in detail below.

7.1 The parameter ATL establishes the alarm differential for temperatures below set point, ATH the alarm differential for temperatures

above set point. Putting one or both differentials to 0 cuts out the corresponding alarm.

Example 1: C-H=REF, SP= -20, HYS= 2.0, ATL= -5.0, ATH= 05.0; the alarm thresholds are set at –25°(-20-5) and –13° (-20+2+5).

Example 2: C-H=HEA, SP=75, HYS=3, ATL=-10, ATH=7; the alarm threshold are set at +62° (75-3-10) and +82° (75+7).

The alarm warning may be immediate or delayed by the time ATD whenever this is greater than 0. The indication for high temperature

and for low temperature alarm blinks on the display. The alarm indication remains stored in the display, even when the alarm is over,

until you acknowledge the alarm manually by pressing any button.

The high temperature alarm is bypassed during defrosting.

7.2 If a suitable door switch has been connected to detect the door status and door switch input control has been enabled (DS=YES),

the door open alarm function is enabled. In this way, if the door remains open the controller will react after the time delay set with ADO

by displaying the alarm source through the indication .

7.3 Assigning a value greater than 0 to the parameter ACC enables the indication for periodic cleaning of the condenser. Subsequently,

when the count of compressor hours of operation reaches the equivalent in weeks set with ACC, an indication for cleaning appears on

the display.

Example: with ACC=16 there is a warning once every 16x7(weeks)x24(hours)=2688 hours of compressor operation, so, assuming

for this an operation with 5 minutes On and 5 minutes Off - after approx. 32 weeks.

In order to clear the time counter, follow the prescribed procedure in paragraph 2.3.

7.4 Upon failure of probe T1 or, if enabled, probe T2, probe failure is signalled with the blinking indication or respectively.

8. TEMPERATURE STORAGE

The MP1-15 features a system for permanent storage of the minimum and maximum temperature logged during operation. This system

is a valid help to achieve compliance with the HACCP directive in its part relating to a correct preservation of foodstuffs. Temperature is

measured by probe T1 which should therefore be placed in a point where the temperature of the preserved product may always be

measured correctly. The logging is however subject to some simple rules that filter the data and give a rational interpretation. The logging

is suspended during the periods in which the refrigerator is put on a standby and during defrostings and, during the normal operation

(thermostatic control), it’s “slowed down” through the parameter TLD. This parameter defines the time during which the measured

temperature must permanently exceed the current value before the logging is performed. In this way, it will be possible to avoid idle

loggings that don’t reflect the actual product temperature, for example, the door being left open, the temperature recovery after a defrost

or other temporary short term temperature huntings.

It is suggested that a reasonably long TLD time is programmed, for instance 5-15 minutes, you then put the product into the refrigerator

and start a new logging cycle by clearing previous values (see par. 2.3). It will now suffice that at regular intervals, in the INFO menu

you check the minimum and maximum logged values in order to know if the product has been kept within the required temperature limits.

9. AUXILIARY FUNCTIONS

9.1 In addition to the basic functions described above, The MP1-15 offers an innovative feature to enhance the performance of the

refrigerator. In fact, you can select the control parameters between two different pre-programmed groups, in order for the fundamental

control parameters to be adapted quickly to changing needs such as, for example: High/Low Temperature range change, stored product

change (meat, fish, vegetables …), maximum cooling capacity or energy saving. The parameters switched over in mode Iand II are:

SPL, SPH, SP, HYS, DFR, FTC and IISL, IISH, IISP, IIHY, IIDF, IIFT.

With the parameter IISM you select if the changeover from Group Ito Group II is made manually, via the button (IISM=MAN), or

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INSTRUCTIONS FOR INSTALLATION AND USE.

inhibited (IISM=NON). The activation of Group II is signalled by the lighting up of the relevant LED on the controller display.

9.2 You select the sensor type for the measurement of temperatures T1 and T2 through the parameter INP. With INP=SN4 probes T1

and T2 must be the LAE models NTC SN4.. and with INP=ST1 the probes must be the LAE models PTC ST1.. With INP=ST1 you can

only choose the scales with 1°resolution (SCL=2°C or SCL=°F).

WARRANTY

LAE electronic SPA guarantees its products against defects due to faulty materials or workmanship for one (1) year from the date of manufacture shown on the container.

The Company shall only replace products which are shown to be defective to the satisfaction of its own technical services. The Company shall not be under any liability