Sprsun V2 Modbus Register 22: Friendly name Temperatura odparowania (Coil temp.)

Technical Definition

The register friendly name Temperatura odparowania (Coil temp.) at address 22 is used to monitor friendly name temperatura odparowania (coil temp.) on the Sprsun V2.

• Protocol: Modbus RTU
• Data Type: S WORD
• Unit: °C
• Access: Read Only

How to Read (Python pymodbus)

Use this code snippet to read this specific value via RS485:

from pymodbus.client.sync import ModbusSerialClient

client = ModbusSerialClient(method='rtu', port='/dev/ttyUSB0', baudrate=9600)
client.connect()

# Read friendly_name Temperatura odparowania (Coil temp.) (Address: 22)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=22, count=2, unit=1)

if not result.isError():
    print(f"Raw Value: {result.registers}")
else:
    print("Error reading register")

client.close()

Integration (Home Assistant)

Paste this into your configuration.yaml:

- platform: modbus_controller
  name: "friendly_name Temperatura odparowania (Coil temp.)"
  address: 22
  value_type: S_WORD
  unit_of_measurement: "°C"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Sprsun V2]

    PLC -- "A+ (D+)" --> Device
    PLC -- "B- (D-)" --> Device
    PLC -- GND --> Device

💡 Engineer's Insight

Analysis: Evaporation Temperature (°C) or Coil Temperature (°C). Temperature of the refrigerant at the evaporator.

Troubleshooting: Low reading: Frosting, low refrigerant charge, airflow issue. High reading: High load, sensor fault.