Remember, the most common failure of the EMS 25 is not electronic—it is human programming error. Always document your parameter changes (use the table in Part 3) and verify your OdO (compressor delay) after any power cycle.
: The appliance sensor should be placed in the return air stream, while the condenser sensor is typically mounted near the discharge line to prevent overheating. Elstat Ems 25 Advanced Manual
| Code | Meaning | Corrective Action | |------|---------|--------------------| | E1 | Sensor open circuit | Check/replace NTC probe | | E2 | Sensor short circuit | Replace probe | | E3 | High temp alarm active | Check cooling system, setpoint | | E4 | Defrost timeout (too long) | Check defrost heaters, term. sensor | | EE | EEPROM error | Factory reset / replace controller | Remember, the most common failure of the EMS
Appliance or condenser sensor failure. The controller may stop the compressor to prevent damage. | Code | Meaning | Corrective Action |