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AT1-5 INSTRUCTIONS FOR USE
Thank you for having chosen a LAE electronic product. Before installing the instrument, please read these instructions carefully
to ensure maximum performance and safety.
DESCRIPTION
INDICATIONS
Thermostat output
Auxiliary output
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 fi tted, check that the rubber gasket
adheres to the panel perfectly, in order to prevent debris and moisture infi ltration 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 where there is the maximum formation of frost.
OPERATION
DISPLAY
During normal operation, the display shows either the temperature measured or one of the following indications:
DEF Defrost in progress
HI
Room high temperature alarm
REC Recovery after defrost
Room low temperature alarm
LO
OFF Controller in stand-by
E1
Probe T1 failure
CL
Condenser clean warning
E2
Probe T2 failure
DO
Door open alarm
INFO MENU
The information available in this menu is:
T1
Instant probe 1 temperature
TLO Minimum probe 1 temperature recorded
Instant probe 2 temperature
Compressor working weeks
T2
CND
THI Maximum probe 1 temperature recorded
LOC
Keypad state lock
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
X
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
X
.
SETPOINT (display and modifi cation 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 controllers 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.
DEFROST
Timed defrost. 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 when power is applied
to the controller and at each subsequent defrost start. When the controller is put on a standby, the accumulated time count is
"frozen" (is not incremented).
Manual defrost. Defrosting may also be induced manually by keeping the button
Defrost type. Once defrost has started, Compressor and Defrost outputs are controlled according to the parameters DTY and
OAU. The AUX output is associated to defrost function with OAU=DEF exclusively.
Defrost termination. Defrost lasts as long as 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.
Caution: if C-H=HEA all defrost functions are inhibited; if DFR=0 the timed defrost function is excluded; during defrost, the high
temperature alarm is inhibited.
CONFIGURATION PARAMETERS
The setup menu is accessed by pressing button
X
+
for 5 seconds.
With button
or
select the parameter to be modifi ed.
Press button
to display the value.
By keeping button
pressed, use button
or
to set 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
X
or wait for 30 seconds.
PAR
RANGE
DESCRIPTION
SCL
1°C;
Readout scale.
2°C;
1°C (only with INP=SN4): 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 reconfigure the parameters relevant to the
absolute and relative temperatures (SPL, SPH, SP, ALA, AHA, etc..)
-50..SPH
Minimum limit for SP setting
SPL
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
Refrigerating control (C-H=REF )
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).
DFR
0... 24(1/24h) Defrost frequency expressed in cycles/24 hours.
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).
* The defrost output is active if only OAU=DEF.
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.
ATM
NON;
Alarm threshold management.
ABS;
NON: all temperature alarms are inhibited (the following parameter will be ADO).
REL
ABS: the values programmed in ALA and AHA represent the real alarm thresholds.
REL: the values programmed in ALR and AHR are alarm differentials referred to SP and SP+HY.
ON
OFF
SP-ALR
Temperature alarm with relative thresholds,
refrigerating control (ATM=REL, C-H=REF).
ALA
-50... 120°
Low temperature alarm threshold.
AHA
-50... 120°
High temperature alarm threshold.
ALR
-12... 0°
Low temperature alarm differential. With ALR=0 the low temperature alarm is excluded.
AHR
0... 12°
High temperature alarm differential. With AHR=0 the high temperature alarm is excluded.
ATD
0... 120min
Delay before alarm temperature warning.
ADO
0... 30min
Delay before door open alarm warning.
pressed for 2 seconds.
ACC
0...52
Condenser periodic cleaning. When the compressor operation time, expressed in weeks, matches the ACC value
weeks
programmed, "CL" flashes in the display. With ACC=0 the condenser cleaning warning is disabled.
SB
NO/YES
Stand-by button enabling
DS
NO/YES
Door switch input enabling (closed when door is closed).
OAU
NON;
AUX output operation
0-1;
NON : output disabled (always off).
DEF;
0-1 : the relay contacts follow the on/standby state of controller.
LGT;
DEF: output programmed for defrost control.
ALR;
LGT : output enabled for light control.
ALR : contacts make when an alarm condition occurs.
INP
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...
ON
OFF
T[°]
T[°]
SP
SP+HY
SP-HY
SP
Heating control (C-H=HEA)
ON
T[°]
T[°]
OFF
SP
SP+HYS+AHR
SP-HYS-ALR
SP
SP+AHR
Temperature alarm with relative thresholds,
heating control (ATM=REL, C-H=HEA).
.
OS1
-12.5..12.5°C Probe T1 offset.
T2
NO/YES
Probe T2 enabling (evaporator).
OS2
-12.5..12.5°C Probe T2 offset.
1...30 min
Delay for minimum temperature (TLO) and maximum temperature (THI) logging.
TLD
0...100
Display slowdown.
SIM
1...255
AT1-5 address for PC communication.
ADR
WIRING DIAGRAM
door
TTL
switch
RS485
7
8
9
11
10
T2
Com
T1
door
AUX
16(5)A
7(2)A
5
4
2
3
1
5
230Vac
230Vac
AT1-5BS4E-AG
door
switch
RS485
7
8
11
10
door
T1
AUX
16(8)A
7(2)A
5
4
2
3
1
230Vac
AT1-5AS6E-BG
TECHNICAL DATA
Power supply
AT1-5...E
230Vac±10%, 50/60Hz, 3W
AT1-5...U
115Vac±10%, 50/60Hz, 3W
AT1-5...D
12Vac±10%, 50/60Hz, 3W
Relay outputs
AT1-5.Q1(2)... compressor 12(4)A
AT1-5.S1(2)... compressor 16(4)A
AT1-5.Q3(4)... compressor 12(5)A
AT1-5.S3(4)... compressor 16(5)A
AT1-5.Q5(6)... compressor 12(8)A
AT1-5.S5(6)... compressor 16(8)A
Auxiliary loads 7(2)A 240vac
AT1-5.Q... maximum total current 12A
AT1-5.S... maximum total current 16A
Inputs
NTC 10KΩ@25°C,
LAE part No. SN4...
door
PTC 1000Ω@25°C,
LAE part No. ST1...
switch
Measuring Range
-50...120°C,
-55...240°F
7
8
9
11
10
-50 / -9.9 ... 19.9 / 80°C (with NTC10K only)
door
T2
Com
T1
Measuring accuracy
AUX
16(8)A
7(2)A
<0.5°C within the measurement range
Operating conditions
4
2
3
1
-10 ... +50°C;
15%...80% r.H.
CE – UL (Approvals and Reference Norms)
EN60730-1; EN60730-2-9;
EN55022 (Class B);
AT1-5BS6E-BG
EN50082-1
UL 60730-1A
Front protection
IP55
VIA PADOVA, 25
31046 ODERZO /TV /ITALY
TEL. +39 - 0422 815320
FAX +39 - 0422 814073
www.lae-electronic.com
E-mail: sales@lae-electronic.com
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