ECP
300
EXPERT STEPPER
Page
33
OPERATION AND MAINTENANCE MANUAL
Rev. 01-20
MANUALLY FORCED DEFROST STOP IN PROGRESS
During a defrost in progress, pressing the DOWN button for 3 seconds forces the end of defrosting.
The manual defrost stop also cancels the dripping.
DEFROST WITH THERMOSTAT RESISTORS
Set parameter d1=2 to manage the defrost with resistors within a time limit. During defrosting the
defrost relay is activated if the temperature read by the defrost probe is less than d2. The
defrosting phase lasts d3 minutes, regardless of the relay status. This allows a better defrosting of
the evaporator with consequent energy savings.
HOT GAS DEFROSTING
WARNING:
this function
is not available
in this type of electrical panel.
Do not set parameter d1=1
.
AMBIENT TEMPERATURE DISPLAY AFTER DEFROSTING
After defrosting, the display continues to display for 1 minute the last ambient temperature value
detected before defrosting begins.
PUMP DOWN FUNCTION
Setting the parameter AU1 = 4 or -4 activates the compressor stop operation in pump down. The
digital input configured as a pump-down input (In1 or In2 = 4 or -4) constitutes the working
pressure switch input and directly manages the compressor output. The AUX relay becomes the
evaporator solenoid call and is managed by the cold call of the thermostat which also turns on the
EEV solenoid output.
INITIAL START-UP PROCEDURE
The fourth level valve parameters must be configured at the first start-up. The first start-up
procedure is as follows:
1)
With the valve disconnected
(terminals 1A-1B-2A-2B free) turn on the ECP300 EXPERT
STEPPER control. The “CFG” alarm appears to indicate that the valve must be configured.
2) Press the SET and STANDBY keys for more than 3 seconds to enter the fourth programming
level. Set the “tEU” parameter according to the type of valve connected, or configure the
necessary parameters (see par. 5.17).
3) When the configuration values have been set, leave the menu by pressing the (
) and (
)
keys simultaneously for a few seconds until the value of the main display reappears.
4) Turn off the ECP300 EXPERT STEPPER control by turning off the power.
5)
Appropriately connect the electronic valve (see Appendix A2 and A4) with the control off
.
6) Turn on the ECP300 EXPERT STEPPER control. When switched on, after an initialization
phase (“ini” is displayed and the valve is completely closed) the control starts adjusting the cell
and the overheating temperature. Then set all the necessary parameters according to the type
of application (ambient set-point, overheating set-point, etc.).
5.27
5.25
5.28
5.29
CHAP. 5 - Data programming
5.26
5.30
