LAE LTR-5 Series Instructions For Use Manual page 43

AH1-5 INSTRUCTIONS FOR USE
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.
DESCRIPTION INDICATIONS
Thermostat output
Fan output
Defrost output
Activation of 2nd parameter set
Alarm
Fig.1 - Front panel
Info / Setpoint button. Increase / manual activation button.
Manual defrost / Decrease button. Exit / Stand-by button.
INSTALLATION
Insert the controller through a hole measuring 71x29 mm.
Make sure that electrical connections comply with the paragraph "wiring diagrams". To reduce the effects of electromagnetic
disturbance, keep the sensor and signal cables well separate from the power wires.
Fix the controller to the panel by means of the suitable clips, by pressingly 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.
Place the probe T1 inside the room in a point that truly represents the temperature of the stored product.
Place the probe T2 on the evaporator where there is the maximum formation of frost.
The function of probe T3 is determined by the parameter T3. With T3=DSP the probe measures the temperature to be displayed.
With T3=CND the probe measures the condenser temperature, it must therefore be placed between the fins of the condensing
unit. With T3=2EU the probe measures the temperature of the second evaporator and it must therefore be placed where there is
the maximum formation of frost. With T3=NON, the third probe is disabled.
OPERATION
DISPLAY
During normal operation, the display shows either the temperature measured or one of the following indications:
Defrost in progress Condenser high pressure alarm
Recovery after defrost Room high temperature alarm
Controller in stand-by Room low temperature alarm
Condenser clean warning Probe T1 failure
Door open alarm Probe T2 failure
Condenser high temperature alarm Probe T3 failure
INFO MENU
The information available in this menu is:
Instant probe 1 temperature Minimum probe 1 temperature recorded
Instant probe 2 temperature Compressor working weeks
Instant probe 3 temperature Keypad state lock
Maximum probe 1 temperature recorded
Access to menu and information displayed.
Press and immediately release button .
With button or select the data to be displayed.
Press button to display value.
To exit from the menu, press button or wait for 10 seconds.
Reset of THI, TLO, CND recordings
With button or select the data to be reset.
Display the value with button .
While keeping button pressed, use button .
SETPOINT (display and modification of desired temperature value)
Press button for at least half second, to display the setpoint value.
By keeping button pressed, use button or to set the desired value (adjustment is within the minimum SPL and the
maximum SPH limit).
When button is released, the new value is stored.
STAND-BY
Button , when pressed for 3 seconds, allows the controller to be put on a standby or output control to be resumed (with SB=YES
only).
KEYPAD LOCK
The keypad lock avoids undesired, potentially dangerous operations, which might be attempted when the controller is operating in
a public place. In the INFO menu, set parameter LOC=YES to inhibit all functions of the buttons. To resume normal operation of
keypad, adjust setting so that LOC=NO.
SELECTION OF SECOND PARAMETER GROUP
It's possible to select control parameters between two different pre-programmed groups, in order for the fundamental control
parameters to be adapted quickly to changing needs.
Changeover from Group I to Group II (and vice versa) may take place manually by pressing button
IISM=MAN), or automatically when heavy duty conditions are detected (with IISM=HDD), or when IISM=DI2 and the auxiliary input
DI2 is activated (the activation of DI2 selects Group II). If IISM=NON, switchover to Group II is inhibited. The activation of Group II
is signalled by the lighting up of the relevant LED on the controller display.
DEFROST
Automatic defrost. A defrost is started automatically as soon as the time set with parameter DFT has elapsed.
Timed defrost. With DFM=TIM the timer increment is continuous and defrosts take place at regular intervals. For example, with
DFM=TIM and DFT=06, a defrost will take place every 6 hours.
Optimized defrost. With DFM=FRO the timer is only increased when the conditions occur for frost to form on the evaporator, until
the time set with parameter DFT is matched. If the evaporator works at 0°C, defrost frequency depends on the thermal load and
climatic conditions. With setpoints much lower than 0°C, defrost frequency mainly depends on the refrigerator operating time.
■ Defrost time count backup . At the power-up, if DFB=YES, the defrost timer resumes the time count from where it was left off
before the power interruption. Vice versa, with DFB=NO, the time count re-starts from 0. In stand-by, the accumulated time count
is frozen.
Manual or remote defrost start. It's possible to manually start a defrost, by pressing button
started remotely, if DI2=RDS, through the making of the auxiliary contact DI2.
Defrost type. Once defrost has started, Compressor and Defrost outputs are controlled according to parameter DTY. If FID=YES,
the evaporator fans are active during defrost.
Defrost termination. The actual defrost duration is influenced by a series of parameters.
Time termination: T2=NO and T3 different from 2EU: the evaporator temperature is not monitored and defrost will last as long
as time DTO.
Temperature monitoring of one evaporator: T2=YES and T3 different from 2EU. In this case, if the sensor T2 measures the
temperature DLI before the time DTO elapses, defrost will be terminated in advance.
Temperature monitoring of two evaporators: T2=YES, T3=2EU, OAU=2EU. This function is for the control of two independent
evaporators and it switches off the individual heating of the evaporator which gets to temperature DLI first, waiting for the second
evaporator to get to that temperature before the time DTO elapses (see figure).
Resuming thermostatic cycle. When defrost is over, if DRN is greater than 0, all outputs will remain off for DRN minutes, in
order for the ice to melt completely and the resulting water to drain. Moreover, if probe T2 is active (T2=YES), the fans will re-start
when the evaporator gets to a temperature lower than FDD; Vice versa, if probe T2 is not active (T2=NO) or after defrost has
come to an end, such condition does not occur by end of the time FTO, after FTO minutes have elapsed the fans will be switched
on anyway.
Caution: if DFM=NON or C-H=HEA all defrost functions are
inhibited; if DFT=0, automatic defrost functions are excluded.
During a high pressure alarm, defrost is suspended. During
defrost, high temperature alarm is bypassed.
Defrost output as heater control. The defrost output can be
used to drive a heater. This is achieved through parameters
HED and HEH.
CONFIGURATION PARAMETERS
To get access to the parameter configuration menu, press
button + for 5 seconds.
With button or select the parameter to be modified.
Press button to display the value.
By keeping button pressed, use button or
the desired value.
When button is released, the newly programmed value
is stored and the following parameter is displayed.
To exit from the setup, press button or wait for 30 seconds.
PAR RANGE DESCRIPTION
SCL 1°C; Readout scale.
2°C; 1°C (with INP=SN4 only): measuring range -50/-9.9 ... 19.9/80°C
°F 2°C : measuring range -50 ... 120°C
°F : measuring range -55 ... 240°F
Caution: upon changing the SCL value, it is then absolutely necessary to re-configure the
parameters relevant to the absolute and relative temperatures (SPL, SPH, SP, ALA, AHA, etc..).
SPL
-50..SPH Minimum limit for SP setting.
SPH SPL.120° Maximum limit for SP setting.
SP SPL... SPH Setpoint (value to be maintained in the room).
C-H REF; HEA Refrigerating (REF) or Heating (HEA) control mode.
HYS
1...10° OFF/ON thermostat differential.
ON
OFF
SP SP+HYS
Refrigerating control (C-H=REF)
HED 0...10° Heating neutral zone.
When T1 < SP-HED-HYS , the defrost output is
turned on, when T1 > SP-HED the defrost output
is turned off. During this operation, the defrost
timer is cleared.
The fan output is switched according to the
defrost output (heater), regardless of the FID
parameter.
HEH
0...10° Heating hysteresis.
If HEH=0 the heater function associated to the defrost output is inhibited.
CRT 0...30min Compressor rest time. The output is switched on again after CRT minutes have elapsed since the
previous switchover. We recommend to set CRT=03 with HYS<2.0°.
CT1 0...30min Thermostat output run when probe T1 is faulty. With CT1=0 the output will always remain OFF.
CT2 0...30min Thermostat output stop when probe T1 is faulty. With CT2=0 and CT1>0 the output will always be ON.
Example: CT1=4, CT2= 6: In case of probe T1 failure, the compressor will cycle 4 minutes ON and 6
minutes OFF.
CSD 0..30min Compressor stop delay after the door has been opened (active only if DS=YES).
2CD 0...120sec Auxiliary compressor start delay. If OAU = 2CU the auxiliary output is switched on with a delay of 2CD
seconds after the main compressor has cut-in. Both compressors are turned off at the same time.
DFM
NON; Defrost start mode
TIM; NON: defrost function is disabled (the following parameter will be FID).
FRO TIM: regular time defrost.
FRO: the defrost time count is only increased when the conditions occurs for frost to form on the
evaporator (optimised time increase)
DFT 0...99 hours Time interval among defrosts. When this time has elapsed since the last defrost, a new defrost cycle is
started.
DFB NO/YES Defrost timer count backup. With DFB=YES, after a power interruption, the timer resumes the count from
where it was left off with ±30 min. approximation. With DFB=NO, after a power interruption, the defrost
timer will re-start to count from zero.
for 2 seconds (with
DLI -50...120° Defrost end temperature.
DTO 1...120min Maximum defrost duration.
DTY
OFF; Defrost type
ELE; OFF: off cycle defrost (Compressor and Heater OFF).
GAS ELE: electric defrost (Compressor OFF and Heater ON).
GAS: hot gas defrost (Compressor and Heater ON).
DRN
0...30min Pause after defrost (evaporator drain down time).
DDY 0...60min Display during defrost. If DDY=0 during defrost the temperature continues to be displayed. If DDY>0,
during defrost the display shows DEF, when defrost is over REC is displayed during DDY minutes.
FID NO/YES Fans active during defrost.
FDD -50...120° Evaporator fan re-start temperature after defrost.
FTO
0...120min Maximum evaporator fan stop after defrost.
for 2 seconds, or defrost may be
FTC NO/YES
Optimised fan control enabling. With FTC = NO the fans remain on all the time.
CMP ON
ON
OFF
Fig.2 Optimised fan control (FTC=YES)
FT1 0...180sec Fan stop delay after compressor stop. See Fig. 2.
FT2 0...30min Timed fan stop. With FT2=0 the fans remain on all the time.
FT3 0...30min Timed fan run. With FT3=0, and FT2 > 0, the fans remain off all the time.
ATM
ON
OFF
DLI
EVP1
ON
DEF1 OFF
DLI
EVP2
ON
ALA
to set DEF2 OFF
AHA
START DRN
ALR
AHR
ATI
ATD
ADO
AHM
AHT
ACC
HDS
ON
IISM
OFF
T[°] SP-HYS SP T[°]
Heating control (C-H=HEA)
IISL
HYS
IISH
SP IISP
IIHY
HED
HEH
IIFT
IIDF
ON
OFF
DEF SB
DS
DI2
LSM
OAU
INP
OS1 -12.5..12.5°C Probe T1 offset.
T2
OS2
-12.5..12.5°C Probe T2 offset.
T3
OS3
-12.5..12.5°C Probe 3 offset.
TLD
SIM
ADR
WIRING DIAGRAMS
CMP OFF CMP ON
FT1 FT2 FT3 FT2 FT3
115...230Vac
NON; Alarm threshold management.
ABS; NON: all temperature alarms are inhibited (the following parameter will be ADO).
ABS: the values programmed in ALA and AHA represent the real alarm thresholds.
REL
REL: the values programmed in ALR and AHR are alarm differentials referred to SP and SP+HYS.
ON
ON
T[°]
OFF
OFF
SP-ALR SP SP+HYS+AHR
SP-HYS-ALR
Temperature alarm with relative thresholds,
Temperature alarm with relative thresholds,
refrigerating control (ATM=REL, C-H=REF). heating control (ATM=REL, C-H=HEA).
-50... 120° Low temperature alarm threshold.
-50... 120° High temperature alarm threshold.
-12... 0° Low temperature alarm differential. With ALR=0 the low temperature alarm is excluded.
0... 12° High temperature alarm differential. With AHR=0 the high temperature alarm is excluded.
T1; T2; T3 Probe used for temperature alarm detection.
0... 120min Delay before alarm temperature warning.
0... 30min Delay before door open alarm warning.
NON; Operation in case of high condenser alarm
ALR; NON: high condenser alarm inhibited.
STP; ALR: in case of alarm, "HC" flashes in the display and the buzzer is switched on.
STP: in addition to the alarm symbols displayed, the compressor is stopped and defrosts are suspended.
-50...120° Condensation temperature alarm (referred to T3 probe).
0...52 Condenser periodic cleaning. When the compressor operation time, expressed in weeks, matches the
weeks ACC value programmed, "CL" flashes in the display. With ACC=0 the condenser cleaning warning is
disabled and CND disappears from Info Menu.
1...5 Controller sensitivity for the automatic switchover from Group 1 to Group 2 (1=minimum, 5=maximum).
NON; Switchover mode to second parameter set
MAN; NON: inhibition to use the second parameter group (the following parameter will be SB).
HDD; MAN: button switches the two parameter groups over.
DI2 HDD: automatic switchover to the second parameter group, when heavy duty conditions are detected.
DI2: switchover to the second parameter group when the auxiliary DI2 input makes.
-50... IISH Minimum limit for IISP setting.
IISL... 120° Maximum limit for IISP setting.
IISL... IISH Setpoint in mode 2.
1... 10° OFF/ON differential in mode 2.
NO/YES Optimised fan control enabling in mode 2.
0...99 hours Defrost timer set to start a defrost in mode 2.
NO/YES Stand-by button enabling.
NO/YES Door switch input enabling (closed when door is closed).
NON; DI2 digital input operation
HPS; NON : digital input 2 not active.
IISM; HPS: when contact opens a condensing unit high pressure alarm occurs.
RDS IISM : when contact makes the controller will use group 2 parameters.
RDS : when contact makes a defrost is started (remote control).
NON; Light control mode
MAN; NON : light output not controlled.
DOR MAN : light ouput controlled through button (if OAU=LGT).
DOR : light ouput switched on when door is opened (if OAU=LGT).
NON; AUX output operation
0-1; NON : output disabled (always off).
LGT; 0-1 : the relay contacts follow the on/standby state of controller.
2CU; LGT : output enabled for light control.
2EU; 2CU : output programmed for the control of an auxiliary compressor.
AL0; 2EU : output enabled for the control of the electrical defrost of a second evaporator.
AL1 AL0 : contacts open when an alarm condition occurs.
AL1 : contacts make when an alarm condition occurs.
SN4; ST1 Temperature sensor selection. With INP = SN4, the probes must be the LAE models SN4..; with INP =
ST1, the probes must be the LAE models ST1...
NO/YES Probe T2 enabling (evaporator).
NON; Auxiliary probe T3 operation
DSP; NON: probe T3 not fitted.
CND; DSP: temperature T3 to be displayed.
2EU CND: condenser temperature measurement.
2EU: second evaporator temperature measurement.
1...30 min Delay for minimum temperature (TLO) and maximum temperature (THI) logging.
0...100 Display slowdown.
1...255 AH1-5 address for PC communication.
AUXswitch
AUX switch Door switch Door switch
RS485 RS485 12...24Vac
Aux
data I/O data I/O 17 18
17 18 19 21 20 23 22 24
DI2 Door T1 T2 T3 DI2
AUX AUX
12(5)A 7(2)A 7(2)A 7(2)A 12(5)A 7(2)A
5 6 3 4
5 6 3 4 2 1 7 8
AH1-5C14W-BG 115...230Vac
TECHNICAL DATA
Power supply
AH1-5...D 12Vdc ±10%, 3W
AH1-5...W 110 - 230Vac±10%, 50/60Hz, 3W
AH1-5...L 7-30Vdc, 3W
Relay outputs
T[°]
Compressor 12(5)A 240Vac
SP
SP+AHR
Evap. fans 7(2)A 240Vac
Defrost 7(2)A 240Vac
Auxiliary loads 7(2)A 240Vac
Inputs
NTC 10KΩ@25°C LAE part No. SN4...
PTC 1000Ω@25°C LAE part No. ST1...
Measurement Range
-50...120°C, -55...240°F
-50 / -9.9 ... 19.9 / 80°C (NTC10K only)
Measurement accuracy
<0.5°C within the measurement range
Real Time Clock battery
>150 hours; self-rechargeable
Operating conditions
-10 ... +50°C; 15%...80% r.H.
CE (Reference Norms)
EN60730-1; EN60730-2-9;
EN55022 (Class B);
EN50082-1
Front protection
IP55
Aux
19 21 20 23 22 24
Door T1 T2 T3
AUX AUX
7(2)A 7(2)A
VIA PADOVA, 25
31046 ODERZO /TV /ITALY
2 1 7 8
TEL. +39 - 0422 815320
FAX +39 - 0422 814073
www.lae-electronic.com
E-mail: sales@lae-electronic.com
AH1-5C24W-BG