ALCO CONTROLS, Heerstr. 111, D-71332 Waiblingen. Germany - Tel.:.49 7151 509 0 - Fax: 49 7151 509 200 07.07.99 P 2 / 11
Electronic Digital Thermostat with Defrost Control
for Ventilated Units Working at Low Temperature Ranges
EC1-040
A.6.5.23 - Rev -
LIST OF PARAMETERS
Parameter Type Min Max Unit Def
PA PASSWORD C 00 +199 - 22
/ SENSOR PARAMETERS
/C Temperature offset of room sensor F -20 +20 °C/°F 0.0
/2 Reading stability C 1 15 - 4
/3 Reading speed C 1 15 - 8
/4 Virtual sensor C 0 100 - 0
/5 °C /°F (0=°C, 1=°F) C 0 1 flag 0
/6 Decimal point (0=yes, 1=no) C 0 1 flag 0
r REGULATOR PARAMETERS
rd Regulator differential F 0.1 +19.9 °C/°F 2
r1 Minimum allowable set C -60 r2 °C/°F -50
r2 Maximum allowable set C r1 +199 °C/°F 60
r3 Enabling Ed alarm (defrosting inhibited as the max duration is
reached, dP-parameter) 0=OFF, 1=ON. C 0
1flag0
r4 Automatic variation of the set-point during the night (or when the
Curtain-switch is closed, with A4 or A5=7) C 0 +20 °C/°F 3.0
r5 Enabling min. and max. temperature monitoring
(0=OFF, 1=ON) C 0 1 flag 0
rt Readout of elapsed time since enabling r5,
Reset of monitored values F 0 199 hours -
rH Readout of max. temp. monitored F -50 +90 °C/°F -
rL Readout of min. temp. monitored F -50 +90 °C/°F -
c COMPRESSOR PARAMETERS
c0 Delay compressor insertion after
control reset C 0 15 min 0
c1 Minimum time between two insertions C 0 15 min 0
c2 Minimum OFF routine C 0 15 min 0
c3 Minimum ON routine C 0 15 min 0
c4 Safety relay (0=OFF,100=ON).
See duty setting C 0 100 min 0
cc Continuous cycle duration C 0 15 hours 4
c6 Alarm delay after continuous cycle C 0 15 hours 2
d DEFROST PARAMETERS
d0 Type of defrost (0=heater (temp.),1=hot gas (temp.), 2= water or
heater (time), 3= hot gas (time)) C 0 3 flag 0
dI Time interval between two defrost cycles F 0 199 hours 8
dt End defrost temperature F -50 +199 °C/°F 4
dP Max duration of the defrosting or effective
duration if d0=2 or 3 F 1 199 min 30
d4 Defrost after power ON (0=no,1=yes) C 0 1 flag 0
d5 Delayed defrost after power ON or
from Multifunct. input (A4 or A5=4) C 0 199 min 0
d6 Blank display during defrost (0=no,1=yes) C 0 1 flag 1
dd Dripping time F 0 15 min 2
Parameter Type Min Max Unit Def
d8 Alarm delay after defrost and/or if A4 or A5=5,
when door is open F 0 15 hours 1
d9 Priority of the defrost over compressor safety (c1, c2, c3)
(0=no,1=yes) C 0 1 flag 0
d/ Defrost sensor reading (d0 = 0 or 1) F - - °C/°F -
dC Time selection (0=hours/min,1=min/s) C 0 1 flag 0
A ALARM PARAMETERS
A0 Alarms and fans delta C 0.1 +20 °C/°F 0.2
AL Low temperature alarm
(with respect to set-point) F 0 +199 °C/°F 0
AH High temperature alarm
(with respect to set-point) F 0 +199 °C/°F 0
Ad Temperature alarm delay C 0 199 min 120
A4 Configuration of the digital input No. 1 C 0 7 - 0
A5 Configuration of the digital input No. 2 C 0 7 - 0
A6 Duty setting in case of external alarm
(0=OFF, 1=ON) C 0 100 min 0
A7 External alarm delay (A4 or A5=2) C 0 199 min 0
FFAN PARAMETERS
F0 Management of fans: 0= fans always ON – specific phases
excluded (see F2, F3 and Fd parameters)
1= thermostatic fans on the basis of the difference between
ambient and evaporator temperature,
2= thermostatic fans according to the
evaporator temp. C 0 2 flag 0
F1 Starting temperature of the fans: Case A F0=1:
Evaporator temperature < (ambient temperature - F1 - A0) = fans are ON
Evaporator temperature > (ambient temp. - F1) = fans are OFF
Case B F0=2:
Evaporator temperature < (Set-point + F1 - A0) = fans are ON
Evaporator temperature > (Set-point + F1)= fans are OFF
F 0 +20 °C/°F 5
F2 STOP fans when compressor idle
(0=no, 1=yes) C 0 1 flag 1
F3 Fans off during defrost (0=no,1=yes) C 0 1 flag 1
Fd Stop after dripping F 0 15 min 1
H OTHER SELECTIONS
H0 Serial address not available C 0 15 - 1
H1 Relay 4: alarm/aux (0=aux,1=alarm) C 0 1 flag 1
H2 0=buttons disabled; 2=IR & buttons disabled;
3=IR remote control disabled C 0 3 flag 1
H3 Password for IR remote control C 00 199 - 00
H4 1=buzzer disabled C 0 1 flag 0
Note: Concerning the indicated parameters, it is recommended to check, before
installing, if the factory value is suitable for the required use.
ALARMS AND SIGNALS
BLINKED FUNCTIONING LED
If a LED blinks it means that the corresponding function is delayed by a
timed routine, by another procedure or inhibited by the digital input.
E0 BLINKS: faulty room sensor / E1 BLINKS: faulty defrost sensor
• Used sensor is not compatible with the control
• The sensor cable is interrupted or short circuited
• Faulty sensor: Take out the sensor from the control and verify the
resistance (NTC: 0°C=27K)
AI BLINKS: immediate external alarm
• Check the “Multifunction” input and the A4 parameter
Ad BLINKS: delayed external alarm
• Check the “Multifunction” input and the A4 and A7 parameters
LO BLINKS: low temperature alarm (temperature less than SET-POINT minus AL)
• Verify the AL, Ad and A0 parameters
The alarm disappears as soon as the temperature rises and ranges
within the selected limits
HI BLINKS: high temperature alarm (temperature higher than SET-POINT plus AH)
• Verify the AH, Ad and A0 parameters
The alarm disappears as soon as the temperature decreases and
ranges within the selected limits
EA, EB, EE: data acquisition failure; controller RESET
Set again the default parameters value:
• switch-OFF the control;
• press the PRG button while switching on the control;
• “-c-” is displayed;
• after few seconds the RESET phase begins and it is possible to change
the parameters; (*)
• if EE persists, press the
button until the error indication disappears.
(*) Re-setting the default values causes the loss of the modifications
relative to the working parameters.
Ed BLINKS: timeout defrost
• Verify the dt, dP and d4 parameters
• Verify defrost efficient
dF BLINKS: defrost currently ON
• It is not an alarm signal. It simply indicates a defrost cycle in progress.
It appears only if the parameter d6=0.
N.B. When cleaning the display use damp cloth and neutral detergent.
ALCO reserves the right to modify the contents of its products without prior notice.
GB
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