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Before installing the instrument, please read these instructions carefully to ensure maximum performance and safety.
![]() | Info / Setpoint button. |
![]() | Manual defrost / Decrease button. |
![]() | Increase / manual activation button. |
![]() | Exit / Stand-by button. |
![]() | Thermostat output |
![]() | Auxiliary output |
![]() | Alarm |
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 | LO | Room low temperature alarm |
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 |
T2 | Instant probe 2 temperature | CND | Compressor working weeks |
THI | Maximum probe 1 temperature recorded | LOC | Keypad state lock |
Access to menu and information displayed.
Reset of THI, TLO, CND recordings
SETPOINT (display and modification of desired temperature value)
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 pressed for 2 seconds.
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.
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.
PAR | RANGE | DESCRIPTION |
SCL | 1°C; 2°C; °F | Readout scale. 1°C (only with INP=SN4): measuring range -50/-9.9... 19.9/80°C 2°C: measuring range -50... 120°C °F: measuring range -55... 240°F 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..) |
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 ![]() Refrigerating control (C-H=REF ) ![]() Heating control (C-H=HEA) |
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; ELE; GAS | Defrost type OFF: off cycle defrost (Compressor and Heater OFF). 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; ABS; REL | Alarm threshold management. 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: the values programmed in ALR and AHR are alarm differentials referred to SP and SP+HY. ![]() Temperature alarm with relative thresholds, refrigerating control (ATM=REL, C-H=REF). ![]() Temperature alarm with relative thresholds, heating control (ATM=REL, C-H=HEA). |
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. |
ACC | 0...52 weeks | Condenser periodic cleaning. When the compressor operation time, expressed in weeks, matches the ACC value 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; 0-1; DEF; LGT; ALR; | AUX output operation NON: output disabled (always off). 0 -1: the relay contacts follow the on/standby state of controller. DEF: output programmed for defrost control. 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... |
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. |
TLD | 1...30 min | Delay for minimum temperature (TLO) and maximum temperature (THI) logging. |
SIM | 0...100 | Display slowdown. |
ADR | 1...255 | AT1-5 address for PC communication. |
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 12 A
AT1-5.S... maximum total current 16A
Inputs
NTC 10KΩ@25°C,
L AE part No. SN4...
PTC 1000Ω@25°C,
L AE part No. ST1...
Measuring Range
-50...120°C, -55...240°F
-50 / -9.9... 19.9 / 80°C (with NTC10K only)
Measuring accuracy
< 0.5°C within the measurement range
Operating conditions
-10... +50°C; 15%...80% r. H.
CE – UL (Approvals and Reference Norms)
EN60730-1; EN60730-2-9;
EN55022 (Class B);
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
Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.
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