Elitech ECS-974neo User manual

User Manual ECS-974neo Temperature Controller
1. Product overview
Mounng size: 71 x 29 mm Product size: 78.5 x 34.5 x 74 mm
1)Temperature measuring range: -50℃~99℃(Only when sensor calibraon value is set to 0)
2)Resoluon: 0.1℃/1℃ seable
3)Accuracy: ±1℃(-40℃~50℃), ±2℃(others)
4)Temperature control range: -50℃~99℃
5)Power supply: 220 VAC±10 %, 50/60Hz; Overall power consumpon: <3W
6)Input port: Cabinet sensor, Evaporator sensor
7)Output port: Cooling/Defrost/Fan
8)Protecon grade of front panel: IP65
9)Operang ambient temperature:0℃~55℃
10)Storage temperature:-25℃~75℃
11)Storage humidity: 20%~85% (non-condensing)
5.Parameter table
2.Display and operation panel
3. Technical parameters
4. LED
set
LED
Seng
Cooling
Defrost
Fan
Drip
Status
ON
ON
OFF
Flash
ON
OFF
ON
OFF
ON
OFF
Meaning
Set administrator menu
Cooling starts.
Cooling stops.
Cooling delays.
Defrost starts.
Defrost stops.
Fan starts.
Fan stops.
Dripping.
Drip stops.
Symbol
drip
No. Menu
Item
Descripon Seng range Default Unit
User menu
0
SEt
Temperature set-point
LSE~HSE
4.0
℃ ℃
Administrator menu
1
PA1
Administrator menu password
00~250
-
/
2 diF Differenal 0.1℃~30.0℃ 2.0 ℃
3
HSE
Higher SEt. Max possible set-point
SEt~99.0
90.0
℃
4 LSE Lower SEt. Min possible set-point -50.0~SEt -50.0 ℃
No. Menu
Item
Descripon Seng range Default Unit
5
Ont
Ont: On me (compressor). Compressor acvaon me in the event of faulty probe.
OFt: OFF me (compressor). Compressor stop me in the event of a faulty probe.
If Ont=0, the compressor is off.
If Ont≠0 and OFt=0, the compressor is always on.
If Ont≠0 and OFt≠0, the compressor funcons in duty cycle mode per Ont/OFt.
0~250
0
min
6 OFt 0~250 1 min
7 dOF
Delay (aer power) OFF. Delay aer switch off; the indicated me must elapse
between switch-off of the compressor relay and the successive switch-on.
0~250 0 min
8 OdO Delay Output (from power) On. Delay me in acvang the outputs aer switch-on
of the controller or aer a power failure.
0~250 0 min
9 dty
Defrost type:0 = electric defrost;
1 = reverse cycle defrost (hot gas);
2 = Free defrost (compressor hot).
0~2 0 /
10 dit Defrost interval me. Interval between the start of two successive defrost
operaons.
1~250 6 hour
11 dCt
Defrost Counng type. Selecon of count mode for the defrost interval.
0 = compressor operang hours;
1= fixed me interval;
2 = compressor stop hours.
0/1/2 1 /
12
dOH
Defrost offset hour. Start-of-defrost delay me from startup of controller.
1~59
1
min
13
dEt
Defrost endurance me. Defrost me-out; dEt=0, defrost is disabled.
0~250
30
min
14
H42
Whether to enable evaporator sensor: y=yes; n=no
n/y
y
/
15
dSt
Defrost stop temperature
-50.0~99.0
8.0
℃
16
dPO
Defrost (at) Power On. Determines if at the start-up the controller must enter
defrosng (if the temperature measured allows this operaon).
y = yes; n = no.
n/y n /
17
FSt
Fan stop temperature
-50.0~99.0
2.0
℃
18
FAd
Fan acvaon differenal
1.0~50.0
2.0
℃
19
Fdt
Fan delay me. Delay me in acvang fans aer a defrost operaon.
0~250
0
min
20
dt
Drainage me. Dripping me
1~250
1
min
21 dFd Defrost fan disable. Allows to select the evaporator probes exclusion during defrost.
y = yes; n = no.
n/y y /
22 FCO Fan Compressor OFF. Allows selecng compressor fans lock OFF (switched off). y =
fans acvated; n = fans off
n/y y /
23
HAL
High Alarm differenal
0.1~20.0
4.0
℃
24
LAL
Low Alarm differenal
0.1~20.0
4.0
℃
25 PAO
Power-on Alarm Override. Alarm exclusion me aer controller switch on or aer a
power failure.
0~15 0 hour
26
dAO
Defrost Alarm Override. Alarm exclusion me aer defrost.
0~250
0
min
27
tAO
Temperature Alarm Override. Temperature alarm signal delay me.
0~250
0
min
28
LOC
Keyboard locking. y = yes; n = no
n/y
n
/
29
PA1
Password 1.
0~250
5
/
30
ndt number display type. View with decimal point. y = yes; n = no n/y y /
31 CA1 Calibraon 1. Posive or negave temperature value added to the value read by
probe 1.
-12.0~12.0 0 ℃
32
CA2
Calibraon 2. Posive or negave temperature value added to the value read by
probe 2.
-12.0~12.0 0 ℃
33 ddL
Defrost display Lock. Viewing mode during defrosng.
0 = shows the temperature read by the cabinet probe;
1 = locks the reading on the temperature value read by cabinet probe when
defrosng starts, and unl the next me the Set-point value is reached;
2 = displays “dEF” during defrosng, and unl the next me the Set-point value is
reached.
0/1/2 1 /
ECS-974neo is a universal standard temperature controller.

7.1 Cooling:
Normally,
Cabinet temperature > temperature set-point (SEt value) + differenal (diF), compressor starts when minimum protecon me elapses.
Cabinet temperature < SEt value, compressor stops.
Note: The minimum protecon me equals to OdO (delay Output (from power) On) at power on for the first me and later dOF (delay
(aer power) OFF).
If cabinet temperature sensor is faulty, cooling outputs in duty cycle mode per Ont/O.
①Ont=0, O=0, the compressor is always off.
②Ont=0, O≠0, the compressor is always off.
③Ont≠0, O=0, the compressor is always on.
7.2 Defrost
1) dEt=0 (defrost endurance me is set to 0), defrost is disabled.
2) dEt≠0, neither during defrosng nor dripping:
① Evaporator sensor is enabled (H42=y), evaporator sensor temperature ≥ defrost stop temperature (dSt), defrost cannot start.
② H42=y, evaporator sensor temperature < dSt, or evaporator sensor is disabled (H42=n), defrost can start in any one of the following
condions:
a.If dPO=y (defrost (at) Power On is enabled), and dOH (defrost Offset Hour) elapses.
b.Defrost interval me (dit) elapses.
c.Press for 3 sec.
Note: dit and dOH is counted per dCt=1(fixed me interval), dCt=0(compressor operang hours) or dCt=2(compressor stop hours).
3) During defrosng, defrost stops in any one of the following condions:
① Evaporator sensor is enabled (H42=y), evaporator sensor temperature > dSt.
② dEt (defrost endurance me) elapses.
③ Press for 3 sec.
4) The controller enters dripping me aer defrost to drain the water generated during defrosng. Cooling is disabled during drainage
me (dt). It enters cooling cycle status aer drainage me elapses.
5) Display during defrosng
ddL=0 (Defrost display Lock): shows the temperature read by the cabinet probe.
ddL=1: locks the reading on the temperature value read by cabinet probe when defrosng starts, and unl the next me the Set-point
value is reached.
User Manual ECS-974neo Temperature Controller
6. Keys’ function
7．Control output
6.1 Keys
Key Funcon Operaon LED
SET
Access user menu Press and release set LED on
Access administrator menu Press for 5 sec set LED on
Shi between menus and parameters Press set LED on
▲
Scrolls through the menu items & increases the values Press set LED on
Upload data to copy card Press for 3 sec Display “uP” if upload succeeded;
display “Er” if upload failed.
▼
Scrolls through the menu items & decreases the values Press set LED on
Download data from copy card Press for 3 sec Display“do” if download succeeded;
display “Er” if download failed.
Exit user menu Press set LED off
View the temperature read by evaporator probe Press Display defrost temperature
Force defrost to start/stop Press for 3 sec on or off
▲+▼ Reset to default (the second copy) Press for 10 sec Display “rSt” if it succeeded.
6.2 Operaon
1) Set temperature
a. Press and release the SET key to enter user menu, set LED lights and SEt is displayed.
b. Press the SET key to display SEt value.
c. Use ▲ and ▼ keys to change SEt value.
d. Press key or keep the controller inacve for 30 sec to save sengs and exit.
e. If the keys are locked, LOC is displayed and it is disabled to adjust SEt value.
2) Set password
a. Press the SET key for 5 sec, the controller displays PA1 (administrator menu password). (If you want to enter administrator menu, you
need to input correct password. When PA1≠0, and you enter administrator menu, the controller displays PA1 value. When PA1=0, you
will enter administrator menu directly).
b. Press the SET key to display 00, then press ▲ or ▼ to enter the password value.
c. Aer entering password value, press the SET key (to confirm the password), PA1 is displayed. The controller automacally verifies the
correctness of the password. When the password is verified (enter administrator menu), use ▲ or ▼ key to scroll through diF, HSE……
CA2, ddL; Otherwise, the controller will exit sengs.
d. Once set, PA1 value must be remembered. Otherwise, parameters cannot be changed. The value 125 is a universal password.
3) Set parameters (PA1 value is input correctly to access administrator menu sengs)
a. When a menu item is selected, press SET key to set its value.
b. Use ▲ or ▼ to change the value.
c. Press SET key to back for selecng another item.
d. Press key or keep the controller inacve for 30 sec to save sengs and exit.
4) Reset parameters
a.In measuring status, press ▲ and ▼ keys for 10 sec, rST is displayed and the controller resets to default.
b.When Elitech copy card CPK-4 is used to download parameters to the controller, it doubles parameters.
c.The first copy is used to control and the second is used to reset parameters.
d.If the second is changed, please connect CPK-4 again to download parameters.
5) Force to start/stop defrost: Press for 3 sec to shi between cooling, defrost and drip.
6) Copy card
Upload (copy parameters in the controller to the copy card)
a.Use keys to set parameters
b.Insert the copy card, press ▲ key unl “uP” is displayed.
c.Plug out the copy card aer 5 sec to power on the controller again.
Download (copy parameters in the copy card to the controller)
a.Insert the copy card, press ▼ key unl “do” is displayed.
b.Plug out the copy card aer 5 sec to power on the controller again.
Note: “Er” shows to indicate upload/download programming failure. Check whether the copy card is connected well.
“EP” shows to indicate the data in copy card disagrees with controller model, causing programming failure. Find a correct copy card to
upload or download parameters.
In this course, keep the power supply stable and copy card connected well. Please do not plug out the copy card before the operaon is
finished.

Defrost type
System status Electric defrost Reverse cycle defrost Free defrost
Cooling Compressor is on Compressor is on Compressor is on
Electric heang is off Four-way valve closes. --
Defrost Compressor is off Compressor is on Compressor is off
Electric heang is on Four-way valve opens. --
Dripping Compressor is off Compressor is off Compressor is off
Electric heang is off Four-way valve opens. --
User Manual ECS-974neo Temperature Controller
ddL=2: displays the label “dEF” during defrosng, and unl the next me the Set-point value is reached.
6) Defrost type: dty = 0: electric defrost; dty = 1: reverse cycle defrost (hot gas); dty = 2: Free defrost (compressor hot).
7.3 Fan
If evaporator sensor is enabled (H42=y), fan runs per evaporator temperature. Fan runs when the temperature value read by evaporator
probe < FSt (Fan stop temperature) – FAd (Fan acvaon differenal). Fan stops when the temperature value read by evaporator probe
> FSt.
In cooling status: FCO=y (Fan acvated), fan runs only based on the value read by the evaporator probe. FCO=n(Fan off), fan runs only
based on the value read by the evaporator probe when compressor switches on for cooling.
In defrosng status: dFd=y(Defrost fan disable), fan runs only based on the value read by the evaporator probe.
dFd=n, fan stops during defrosng.
Fan is acvated when Fan delay me (Fdt) elapses aer a defrost operaon.
When evaporator sensor is faulty or disabled, fan does not run based on the value read by the evaporator probe. i.e. in cooling status:
FCO=y (Fan acvated), fan runs.
FCO=n(Fan off), fan runs when compressor switches on for cooling. Fan stops when compressor switches off.
In defrosng status: dFd=y(Defrost fan disable), fan runs during defrosng.
dFd==n, fan stops during defrosng.
Fan is acvated when Fan delay me (Fdt) elapses aer a defrost operaon.
7.4 Alarm
When cabinet sensor fails, E1 is displayed. When evaporator sensor fails, E2 is displayed.
High cabinet temperature alarm is triggered when cabinet temperature > SEt value + HAL (High Alarm differenal), and temperature
alarm delay elapses. AH1 is displayed. High cabinet temperature alarm is removed when cabinet temperature < SEt value + HAL.
Low cabinet temperature alarm is triggered when cabinet temperature < SEt value - LAL (Low Alarm differenal), and temperature alarm
delay elapses. AL1 is displayed. Low cabinet temperature alarm is removed when cabinet temperature > SEt value + LAL.
Note:Temperature alarm delay equals to PAO (Power-on Alarm Override) aer power on for the first me, dAO (defrost Alarm
Override) during defrosng and tAO (temperature Alarm Override) in other condions.
8. Fault code
Fault
Cabinet sensor fault
Evaporator sensor fault
High cabinet temperature alarm
Low cabinet temperature alarm
Copy card programming failure
The data in copy card disagrees with controller model, causing programming failure.
Reset to default (the second copy).
Display
E1
E2
AH1
AL1
Er
EP
rSt
9. Wiring diagram:(Refer to actual products)
10. Safety precautions
1)Do disnguish the ports of sensor lead, power cord and relays. Please do not connect lines wrong. The relay cannot be overloaded.
2)Wiring requires disconnecon of power supply first.
★Warning:
The controller is forbidden to be used in water or too humid environment, high temperature, strong electromagnec interference or
strong corrosion environment.
★ Noce:
1)The power voltage must be in accordance with the voltage labeled on the controller. Please ensure the stability of power voltage.
2)Suggest keeping suitable distance between sensor lead and power cord to avoid possible interference.
3)Remove the sensor by slightly plugging out its end downwards.
17（5）A
4 5 6 7 8 9 10
V1.0