Q: What do codes like E1, E2, L3, P1 on the display mean?

Deye Device Display Code Guide: Decode Your Unit's "Language"

This guide explains the meaning of common codes such as E1, E2, L3, P1 that may appear on Deye dehumidifier displays. These codes indicate normal operating status or alert conditions, not random errors. Understanding them helps you monitor performance, conduct routine maintenance, and respond properly to keep your unit in reliable working condition.

1. E?Series Codes | Core Component Fault Alerts

E?codes signal abnormalities in sensors, refrigeration components, circuits, or other critical parts. The unit will activate protective actions accordingly.

1. E0: EEPROM circuit abnormality. Unit enters standby mode. Professional circuit inspection required.

2. E1: Temperature sensor fault (open or short circuit). Unit remains operational; check sensor connections.

3. E2: Humidity sensor fault (open or short circuit). Unit enters standby mode. Inspect sensor and wiring.

4. E3: Refrigeration system or compressor malfunction. Unit enters standby mode. Stop use and arrange professional service.

5. E4: Meaning varies by model: phase sequence error (3?phase models); pump or circuit fault (Model K60A3); membrane keypad failure (Models 6138EB etc.). Unit enters standby mode.

6. E5: Overcurrent protection. Unit reduces frequency automatically; enters standby if abnormality persists. Check power supply.

2. L?Series Codes | Environmental & Auxiliary Status Alerts

L?codes relate to ambient conditions or auxiliary components. Most do not interrupt core dehumidifying functions.

1. L1: Particle sensor or circuit abnormality. Dehumidification remains functional. Switch to CONTINUOUS mode (CO) if needed.

2. L2: Main fan motor or circuit failure. Unit enters standby mode. Prompt service required.

3. L3: Overheat warning: inlet temperature exceeds 42°C. Compressor shuts down; fan runs at low speed. Unit resumes automatically when temperature normalizes.

4. L4: Low?temperature warning: inlet temperature below 0°C. Compressor shuts down; fan runs at low speed. Unit restarts when conditions stabilize.

3. P?Series Codes | Electrical & System Protection Alerts

P?codes indicate issues with power supply, control modules, communications, or mechanical safety systems.

1. P0: IPM module or related circuit fault. Unit may enter standby mode. Requires professional diagnosis and repair.

2. P1: Mains voltage over or under limit. Unit reduces frequency to adapt; enters standby if voltage is severely unstable. Check power supply.

3. P4: Compressor stall error. Unit reduces frequency automatically; enters standby in severe cases. Inspect compressor system.

4. P5: Communication failure. Unit enters standby mode (except power button). Check internal signal and power connections.

5. P6: Front panel removal detection. Unit enters standby mode. Reattach the front panel to resume operation.

6. P8: Water pump or related circuit fault. Unit enters standby mode. Inspect pump operation and wiring.

4. Abnormal Numerical Readings | Sensor Malfunction Signs

1. Display shows ?1, ?2, ?9: Possible temperature or humidity sensor failure.

2. Display shows 50 and humidity cannot be adjusted: Typical humidity sensor fault.

3. Display remains at 99: Typical humidity sensor fault.

5. Recommended Response to Fault Codes

1. Assess severity before taking action

For non?critical alerts such as L1, you may switch modes and continue use. For serious faults including E3, P0, E4 that trigger standby mode, stop operation immediately to prevent further damage.

2. Do not disassemble the unit

Internal circuits, compressor, and sensors are precision assemblies. Unqualified disassembly may cause electric shock, equipment damage, or safety risks. Repairs must be performed by authorized technicians.

3. Contact official support promptly

If codes appear and cannot be cleared by basic checks, refer to your user manual. For further assistance, contact Deye after?sales service, call the support hotline at 400?888?0828, or reach out to your local authorized dealer.

Dye is committed to delivering stable, reliable products and comprehensive after?sales support. Display codes are designed to enhance safety and user experience. With proper understanding and routine care, your Deye unit will maintain consistent performance.

For any questions during use, the Deye service team is ready to assist and ensure safe, dependable operation.

Important Note: Do not attempt to disassemble or repair the device yourself, as this may create safety hazards. For any displayed code or operational irregularity, consult the user manual or contact Deye official service directly.