Senville LETO Series Error Code Reference Guide

Modified on Mon, 7 Apr at 10:27 AM

Understanding Error Codes

If your indoor or outdoor unit displays an error code (like EH 00 or PC 00), your system has detected an issue. Use the tables below to identify what the code means and how to address it.

Normal Display Codes (Not Errors)

Code	Meaning	Solution
dF	Defrost Mode	No action needed — normal operation
CL	Filter Cleaning Reminder	Clean filters (displays 15 seconds at power-on)
F (alternate)	Filter Replacement Reminder	Replace air filters (some models)
FP	Low Temp Heating (below 8°C)	No action needed — normal operation
FC	Forced Cooling	Manual override — ensure it’s not accidentally enabled
AP	Wi-Fi AP Mode	System is in pairing mode — connect via Alexa app
CP	Remote Turned Off Unit	No action needed — restart via remote if desired

Indoor Unit Error Codes

Code	Issue	Solution
EH 00	Indoor EEPROM malfunction	Replace indoor main PCB
EH 0A	Indoor EEPROM parameter error	Reset or reprogram board; replace if needed
EL 01	Indoor & Outdoor communication error	Check wiring between IDU & ODU; inspect control board
EH 02	Zero-crossing signal detection error	Replace indoor PCB
EH 03	Indoor fan speed out of control	Inspect fan motor or control board
EH 60	Room temperature sensor (T1) error	Replace T1 sensor
EH 61	Pipe temperature sensor (T2) error	Replace T2 sensor
EH 0	Main & display board communication error	Check wiring or replace either board
FH CC	Refrigerant sensor error	Replace sensor module
EH C1	Refrigerant leak detected	Leak test and recharge refrigerant
EH C2	Sensor out of range & leak detected	Replace sensor and repair refrigerant line
EH C3	Refrigerant sensor out of range	Replace sensor

Outdoor Unit Error Codes

Code	Issue	Solution
EC 51	ODU EEPROM parameter error	Replace or reprogram outdoor main board
EC 52	Coil temperature sensor (T3) error	Replace T3 sensor
EC 53	Ambient temperature sensor (T4) error	Replace T4 sensor
EC 54	Discharge temp sensor (TP) error	Replace TP sensor
EC 56	Indoor coil outlet sensor (T2B) error	Replace T2B sensor (multi-zone only)
EC 07	Outdoor fan speed out of control	Inspect or replace fan motor/control board
EL 0C	System lacks refrigerant	Check for leaks and recharge system

Protection Codes (System Safeguards)

Code	Issue	Solution
PC 00	IPM module protection	Inspect IPM board and cooling conditions
PC 01	Voltage protection	Check power supply and voltage range
PC 02	Over-temp of compressor/IPM	Inspect ventilation, refrigerant flow, and clean coils
PC 03	High/low pressure protection	Check refrigerant pressure and blockage
PC 04	Inverter compressor drive error	Inspect drive board or compressor connection
PC 06	Compressor discharge temp too high	Clean coils, verify refrigerant, check airflow
PC 08	Overcurrent protection	Check current draw, fan resistance, and wiring
PC 0A	Condenser high temp protection	Clean condenser and ensure airflow
PC 0F	PFC module protection	Replace or test PFC circuit
PC 10–12	AC voltage/DC bus issues	Check capacitor, voltage source, and connections
PC 30–31	High/Low system pressure	Evaluate refrigerant charge and blockage
PC 40–46	Compressor control or signal issues	Inspect compressor, sensors, and PCBs
LC 06	IPM high temp protection	Improve cooling and ventilation
PH 90/91	Evaporator temp protection (high/low)	Ensure airflow is not blocked, clean filters

Other Errors

---- – Conflicting modes on indoor units (multi-zone system)
Garbled display – May be an undefined code or a temperature reading

Troubleshooting Tips

Use the remote control to test unit response
If unresponsive, the indoor PCB may need replacement
If the display is faulty but unit works, the display board may need replacing

Need More Help?

If your issue isn’t resolved by this guide, please submit a support ticket. Include your error code and model number for faster service.