Senville Mini Split Error Codes: EL 01, E1, CL and More
By Ray Bennett · Updated 2 October 2026 · 6 min read · Checked against the maker’s manual 
Senville's display shows two kinds of code. dF, CL, FP, FC, AP and CP are normal messages, such as defrost or a reminder to clean the filters. Real errors start EH for the indoor unit, EC for the outdoor unit and PC for protection, and EL 01, the same fault as E1 or 88 on some units, means the indoor and outdoor units are not talking.
A Senville mini split puts its messages on the indoor unit’s display, and not all of them are faults. Some tell you what the unit is doing or remind you to clean the filters. The rest are error codes, and the first two letters tell you where to look.
Everything on this page comes from Senville’s own support knowledge base: its error code reference guides for the LETO and AURA series, its diagnostic for the E1 and EL 01 communication error, and its note on the multi zone mode conflict. Senville says its board tests are for a certified HVAC contractor, and this page keeps to the checks an owner can make.
Before you start
What to carry: a torch, a pen and the remote. Ten minutes.
Gas or electric? A mini split is all electric, a heat pump that heats and cools.
Know your series. The label on the indoor unit tells you whether it is a LETO or an AURA. Their code lists are nearly the same.
Read the first two letters. EH is an indoor unit fault, EC an outdoor unit fault, EL a communication or refrigerant fault, and PC a protection stop.
A refrigerant sensor code is a real leak warning. On units with a refrigerant sensor, Senville says EH C1 means a leak has been detected, and the fix is a leak test and recharge. Switch the system off and call a technician.
Messages that are not errors
Rule these out first
dF, defrost. Senville says no action is needed, it is a normal cycle: what a mini split does on heat that looks like a fault.
CL, clean the filters. A reminder that shows for 15 seconds after power-on. Some models show F for a filter replacement reminder.
FP, low temperature heating. Senville calls it an automatic heating safeguard for a room below 8°C, about 46°F.
FC, forced cooling. A manual override. Senville says to make sure it was not switched on by accident.
AP, Wi-Fi pairing. The unit is waiting to connect through the app.
CP, off by the remote. The remote switched the unit off. Restart it with the remote.
EL 01, E1 or 88: the units are not talking
Work Senville's steps
What it means. Senville says E1, EL 01, 8.8 or 88 on the indoor unit means a communication problem between the indoor units and the outdoor unit.
On a new install. Senville’s first step is to check that terminals 1, 2, 3 and G on the indoor unit match the outdoor unit’s, colour for colour. If 1 is red indoors, 1 is red outdoors.
On a system that was working. Turn it off at the breaker, wait 2 minutes, and turn it back on.
If it is still there. Check the wires on 1, 2 and 3 are on the matching terminals at the outdoor unit, with the power off.
After that. Senville’s next steps are a voltage test between terminals 2 and 3 and a check of the reactor, to tell the indoor board, the outdoor board and the reactor apart. Senville says these must be done by a certified HVAC contractor.
The indoor unit codes
| Code | What Senville says it means | Senville’s fix |
|---|---|---|
| EH 00 | Indoor memory (EEPROM) malfunction | Indoor main board |
| EH 0A | Indoor memory parameter error | Reprogram or replace the board |
| EL 01 | Indoor and outdoor communication error | Wiring, then a board |
| EH 02 | Zero crossing signal detection error | Indoor board |
| EH 03 | Indoor fan speed out of control | Fan motor or control board |
| EH 60 | Room temperature sensor (T1) | Replace the sensor |
| EH 61 | Indoor coil temperature sensor (T2) | Replace the sensor |
| EH 0b | Display board and control board not talking | Wiring or a board |
| FH CC | Refrigerant sensor error | Replace the sensor module |
| EH C1 | Refrigerant leak detected | Leak test and recharge |
| EH C2 | Sensor out of range and a leak detected | New sensor, repair the line |
| EH C3 | Refrigerant sensor out of range | Replace the sensor |
| EC C1 | Another indoor unit detects a leak, multi zone | Leak inspection |
The outdoor unit and protection codes
| Code | What Senville says it means | Senville’s fix |
|---|---|---|
| EC 51 | Outdoor memory parameter error | Outdoor board |
| EC 52 | Outdoor coil sensor (T3) | Replace the sensor |
| EC 53 | Outdoor air sensor (T4) | Replace the sensor |
| EC 54 | Discharge temperature sensor (TP) | Replace the sensor |
| EC 56 | Indoor coil outlet sensor (T2B), multi zone | Replace the sensor |
| EC 07 | Outdoor fan speed out of control | Fan motor or drive circuit |
| EL 0C | System lacks refrigerant | Find the leak and recharge |
| PC 00 | IPM module protection | Cooling and the IPM board |
| PC 01 | Voltage protection | Check the power supply |
| PC 02 | Compressor or IPM too hot | Ventilation, refrigerant flow, clean coils |
| PC 03 | High or low pressure protection | Refrigerant pressure and blockages |
| PC 04 | Inverter compressor drive error | Drive board or compressor connection |
| PC 06 | Compressor discharge too hot | Clean coils, check refrigerant and airflow |
| PC 08 | Overcurrent protection | Current draw, fan, wiring |
| PC 0A | Outdoor coil too hot | Clean the outdoor coil, airflow |
| PC 0F | PFC module protection | The PFC circuit |
| PC 0L | Low outdoor temperature protection | No action unless it misbehaves |
| LC 06 | IPM high temperature protection | Cooling and ventilation |
| PH 90, PH 91 | Indoor coil temperature protection, high or low | Airflow clear, filters clean |
| Two dashes | Mode conflict, multi zone | Every unit on the same mode |
The checks that are yours
Work the owner checks
Two dashes on a multi zone system. Senville says one unit is set to cool while another is set to heat. Set every unit to the same mode and the dashes go.
CL, PH 90 and PH 91: the filters. Senville’s fix for PH 90 and 91 is making sure airflow is not blocked and the filters are clean: how to wash mini split filters.
PC 02, PC 06 and PC 0A: the outdoor coil. Senville names clean coils, airflow and ventilation. Clear space around the outdoor unit and rinse the coil: how to rinse an outdoor coil without bending the fins.
A display that makes no sense. Senville says a garbled code may just be a temperature reading. Test with the remote: if the unit does not respond, Senville points at the indoor board, and if it works but the display is wrong, at the display board.
PC 0L in a cold snap. Senville says no action is needed unless it malfunctions. It clears as the weather warms.
When it needs a technician
Know when to stop
EL 0C, EH C1, EH C2 and EC C1. Refrigerant is missing or leaking. Senville’s fix is a leak test and recharge, which is licensed work: signs the refrigerant is leaking.
The sensor codes. EH 60, EH 61, FH CC, EH C3 and EC 52 to EC 56. Senville’s fix is a new sensor.
The board codes. EH 00, EH 0A, EH 02, EH 0b and EC 51, and EL 01 once the wiring checks out.
PC 00, PC 04, PC 08 and PC 0F. The compressor’s power electronics. Meter work at full voltage.
Questions people ask
What does EL 01 mean on a Senville?
The indoor and outdoor units are not communicating. Senville’s steps: match the wire colours on terminals 1, 2, 3 and G at both ends on a new install, or reset at the breaker for 2 minutes on a working system.
What does 88 mean on a Senville mini split?
Senville groups 88 and 8.8 with E1 and EL 01 as the same communication problem between the indoor and outdoor units.
What does CL mean on a Senville?
A reminder to clean the filters, not a fault. It shows for 15 seconds after power-on.
Why does my Senville show dF?
It is defrosting. Senville says it is a normal cycle and no action is needed. Heating returns by itself.
What does EL 0C mean?
The system lacks refrigerant. Senville’s fix is to check for leaks and recharge, which needs a licensed technician.
What do two dashes mean on a Senville?
A mode conflict on a multi zone system: one unit is on cool and another on heat. Set them all to the same mode.
Sources: Senville support knowledge base: LETO and AURA series error code reference guides (April 2025), the E1 / EL 01 / 88 diagnostic and the mode conflict article
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