Carel EVD4 User Manual (English)

Questions and Answers:

B
brandonwrightSep 4, 2025
What to check if Carel showcase doesn't reach set temperature with valve fully open?
- D
  Daniel ColemanSep 4, 2025
  If a Carel Controller-controlled showcase doesn't reach the set temperature even when the valve is fully open, several issues could be the cause. A blocked solenoid might be preventing proper refrigerant flow, so check that the solenoid opens correctly, inspect the electrical connections, and verify the relay operation. Insufficient refrigerant could also be the problem, so check for air bubbles in the liquid indicator upstream of the expansion valve and ensure the subcooling is suitable (greater than 5 °C); if needed, charge the circuit. Lastly, the valve might be blocked closed, even when commanded open, so use manual control to fully close and open the valve; if the superheat remains high, check the electrical connections and/or replace the valve.
M
Mary HarrisSep 7, 2025
Why liquid returns to the compressor only when starting Carel EVD4?
- W
  williamsbrendaSep 7, 2025
  If liquid refrigerant is returning to the compressor only when starting the Carel Controller after it has been off, the “Circuit/EEV ratio” parameter might be too high. Try lowering the value of the “Circuit/EEV ratio” parameter.
J
jenniferreyesSep 12, 2025
What to do if Carel showcase doesn't reach set temperature and valve position is always 0?
- P
  Paige MunozSep 12, 2025
  If your Carel Controller-controlled showcase isn't reaching the set temperature and the valve position is always at 0, there are a couple of things to check. First, ensure the driver is correctly set in STAND ALONE mode by verifying that the stand alone parameter is activated. Also, check the connection of the driver's digital input to make sure it's correctly connected.

Carel EVD4 Specifications

General

Model	EVD4
Type	Electronic Expansion Valve Controller
Power Consumption	5 VA max
Protection Rating	IP20
Input Voltage	24 Vac/dc
Serial Ports	RS485
Protocol	Modbus RTU
Analog Outputs	0-10Vdc / 4-20mA (configurable)
Humidity	10..90% RH non-condensing