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User Manual
ECS-974neo Temperature Controller
6. Keys' function
6.1 Keys
Key
Function
Access user menu
SET
Access administrator menu
Shift between menus and parameters
Scrolls through the menu items & increases the values
▲
Upload data to copy card
Scrolls through the menu items & decreases the values
▼
Download data from copy card
Exit user menu
View the temperature read by evaporator probe
Force defrost to start/stop
▲+▼
Reset to default (the second copy)
6.2 Operation
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 inactive for 30 sec to save settings 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. After entering password value, press the SET key (to confirm the password), PA1 is displayed. The controller automatically 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 settings.
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 settings)
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 selecting another item.
d. Press
key or keep the controller inactive for 30 sec to save settings 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 shift between cooling, defrost and drip.
Operation
LED
Press and release
set LED on
Press for 5 sec
set LED on
Press
set LED on
Press
set LED on
Display "uP" if upload succeeded;
Press for 3 sec
display "Er" if upload failed.
Press
set LED on
Display"do" if download succeeded;
Press for 3 sec
display "Er" if download failed.
Press
set LED off
Press
Display defrost temperature
Press for 3 sec
on or off
Press for 10 sec
Display "rSt" if it succeeded.
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 until "uP" is displayed.
c.Plug out the copy card after 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 until "do" is displayed.
b.Plug out the copy card after 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 operation is
finished.
7．Control output
7.1 Cooling:
Normally,
Cabinet temperature > temperature set-point (SEt value) + differential (diF), compressor starts when minimum protection time elapses.
Cabinet temperature < SEt value, compressor stops.
Note: The minimum protection time equals to OdO (delay Output (from power) On) at power on for the first time and later dOF (delay
(after power) OFF).
If cabinet temperature sensor is faulty, cooling outputs in duty cycle mode per Ont/Oft.
①Ont=0, Oft=0, the compressor is always off.
②Ont=0, Oft≠0, the compressor is always off.
③Ont≠0, Oft=0, the compressor is always on.
7.2 Defrost
1) dEt=0 (defrost endurance time is set to 0), defrost is disabled.
2) dEt≠0, neither during defrosting 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
conditions:
a.If dPO=y (defrost (at) Power On is enabled), and dOH (defrost Offset Hour) elapses.
b.Defrost interval time (dit) elapses.
c.Press
for 3 sec.
Note: dit and dOH is counted per dCt=1(fixed time interval), dCt=0(compressor operating hours) or dCt=2(compressor stop hours).
3) During defrosting, defrost stops in any one of the following conditions:
① Evaporator sensor is enabled (H42=y), evaporator sensor temperature > dSt.
② dEt (defrost endurance time) elapses.
③ Press
for 3 sec.
4) The controller enters dripping time after defrost to drain the water generated during defrosting. Cooling is disabled during drainage
time (dt). It enters cooling cycle status after drainage time elapses.
5) Display during defrosting
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 defrosting starts, and until the next time the Set-point
value is reached.
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