Senville Air Conditioners Error Codes

E1

Indoor unit displays E1 and stops cooling; fan may still run but compressor does not start.

Indoor/Outdoor Communication Failure

E2

Indoor unit shows E2 and stops cooling or heating; unit may run briefly then shut down.

Indoor Evaporator Coil Temperature Sensor (T1) Fault

E3

Indoor unit displays E3; outdoor unit may not start or shuts down shortly after starting.

Outdoor Coil Temperature Sensor (T2) Fault

E4

Indoor unit shows E4; unit may stop during heating or defrost cycles, or not enter defrost properly.

Outdoor Discharge Pipe Temperature Sensor (T3) Fault

E5

Indoor unit displays E5; compressor may not start or shuts down quickly; sometimes accompanied by humming from outdoor unit.

Overcurrent or Compressor Overload Protection

E6

Indoor unit shows E6; outdoor unit may not respond; system does not cool or heat.

Indoor-Outdoor Communication Error (Alternate Code)

E7

Indoor unit displays E7; system may not start or may run only in limited modes.

Mode Conflict or Indoor Unit/Outdoor Unit Mismatch

E8

Indoor unit shows E8; unit may shut down unexpectedly, especially in high load conditions.

Indoor Fan Motor or Overload Protection Fault

E9

Indoor unit displays E9; unit may stop and beep; sometimes associated with water leakage or full drain pan.

Indoor Unit Full Water / Drainage Protection

F0

Indoor unit displays F0; system may not cool or heat properly and may shut down.

Refrigerant System Low Charge or Underload Protection

F1

Indoor unit shows F1; unit may run but with poor temperature control or may shut down intermittently.

Indoor Ambient Temperature Sensor (Room Sensor) Fault

F2

Indoor unit displays F2; unit may freeze up or shut down unexpectedly.

Indoor Evaporator Coil Sensor (Alternate Code) Fault

F3

Indoor unit shows F3; heating performance is poor or unit stops in heating mode.

Outdoor Coil Sensor (Alternate Code) Fault

F4

Indoor unit displays F4; compressor may not start or may shut down quickly.

Compressor Discharge Temperature Sensor (Alternate Code) Fault

F5

Indoor unit shows F5; unit may stop in cooling or heating, especially under extreme outdoor temperatures.

Outdoor Ambient Temperature Sensor Fault

F6

Indoor unit displays F6; compressor may run at reduced capacity or shut down.

Indoor Fan Speed Feedback Fault

F7

Indoor unit shows F7; outdoor fan may not run or runs erratically.

Outdoor Fan Motor or Speed Feedback Fault

F8

Indoor unit displays F8; unit may stop during high load or high ambient conditions.

High Discharge Temperature Protection

F9

Indoor unit shows F9; unit may not defrost properly or may stop in heating mode.

Defrost Sensor or Defrost Protection Fault

H1

Indoor unit displays H1; heating does not start immediately, indoor fan may stop.

Defrost or Preheating Mode Indication

H3

Indoor unit shows H3; compressor stops and system shuts down to protect itself.

Compressor Overload Protection / Overheat

H4

Indoor unit displays H4; unit may not heat or cool and may shut down.

Inverter Module or Compressor Drive Fault

H5

Indoor unit shows H5; system may not start or may shut down shortly after starting.

IPM Protection or Current Sensing Fault

P0

Indoor unit displays P0; compressor may not start or may run at limited capacity.

DC Bus Voltage Protection

P1

Indoor unit shows P1; unit may stop and restart frequently.

High or Low Voltage Protection

P2

Indoor unit displays P2; unit may stop in cooling mode, especially in high humidity.

High Temperature Protection of Compressor Top or Condenser

P4

Indoor unit shows P4; compressor may not start or may shut down quickly.

Inverter Module Temperature Protection

Symptom

Indoor fan runs but compressor cycles off on very hot days; room temperature rises.

Overheating / High Pressure Shutdown

Symptom

Indoor unit blows air but airflow is very weak even on high fan speed.

Restricted Indoor Airflow

Symptom

Indoor unit display or LEDs flicker or behave erratically; unit may reset randomly.

Unstable Control Voltage or PCB Issue

Symptom

Indoor unit does not power on at all; no lights or display, remote has no effect.

No Power to Indoor Unit

Symptom

Indoor unit emits a burning or electrical smell during operation.

Overheating Electrical Component or Dust Burn-Off

Symptom

Indoor unit emits a musty or moldy odor when starting up.

Biological Growth on Evaporator Coil or Drain Pan

Symptom

Indoor unit fan does not run, but the unit powers on and responds to the remote.

Indoor Fan Motor Failure

Symptom

Indoor unit frequently turns on and off (short cycling) without reaching the set temperature.

Short Cycling / Improper Control

Symptom

Indoor unit makes a clicking or popping noise when starting or stopping.

Thermal Expansion and Plastic Casing Noise

Symptom

Indoor unit runs but does not cool well; air is only slightly cool even after 30 minutes of operation.

Reduced Cooling Capacity / Underperformance

Symptom

Indoor unit runs but does not heat well in HEAT mode; air is lukewarm and room never reaches set temperature.

Reduced Heating Capacity

Symptom

Loud humming, grinding, or metal-on-metal noise from the outdoor unit.

Outdoor Mechanical Noise

Symptom

Loud rattling or buzzing noise from the indoor unit during operation.

Indoor Unit Vibration or Loose Components

Symptom

Outdoor fan runs but compressor does not start; no cooling or heating.

Compressor Non-Start

Symptom

Outdoor unit does not start; indoor unit blows room-temperature air with no compressor or outdoor fan operation.

Outdoor Unit Non-Start

Symptom

Remote control does not operate the indoor unit, but the unit can be controlled manually (if buttons exist).

Remote Control or IR Receiver Failure

Symptom

Water dripping from the front or bottom of the indoor unit onto the wall or floor.

Indoor Unit Water Leak

Symptom

Water pooling around the base of the outdoor unit or dripping excessively from unusual locations.

Outdoor Unit Drainage or Defrost Water Issue