Senville AC Error Codes and Troubleshooting

Indoor Unit Error Display:

Error Codes	LED Status
E0	EEPROM parameter error
E1	Indoor / outdoor units communication protection
E2	Zero-crossing signal error
E3	Indoor fan speed out of control
E5	Open or short circuit of outdoor temperature sensor or outdoor unit EEPROM parameter error
E6	Open or short circuit of room or evaporator temperature sensor
E7	Outdoor fan speed out of control
P0	IBM malfunction or IGBT over-strong current protection
P1	Over voltage or too low voltage protection
P2	Temperature protection of compressor top.
P4	Inverter compressor drive error

Outdoor unit error display:

On the outdoor PCB, there are two LED lights. One is green, the other is red. You can judge what the error is through the status of the two lights.

Indoor Unit Display: P1

LED 6 (Green) Light, LED 5 (RED) Light: Over voltage or too lows or too voltage protection

Indoor Unit Display: P2

LED 6 (Green) Light, LED 5 (RED) Flash: Over voltage or too lows or too voltage protection

Indoor Unit Display: P4

LED 6 (Green) Off, LED 5 (RED) Flash: Inverter compressor drive error

Indoor Unit Display: P4

LED 6 (Green) Flash, LED 5 (RED) Light: Inverter compressor drive error

Indoor Unit Display: P4

LED 6 (Green) Flash, LED 5 (RED) Flash: Inverter compressor drive error

Indoor Unit Display: P0

LED 6 (Green) Flash, LED 5 (RED) Off: IBM malfuntion or IGBT over-strong current protection

Indoor Unit Display: Stand by

LED 6 (Green) Light, LED 5 (RED) Off: Stand by

Troubleshooting

Malfunctions: Unit does not start

Cause:

Power cut
Unit may have become Unplugged
Fuse may have blown
Battery in Remote controller may have been exhausted
The time you have set with timer is incorrect

What should be done:

Wait for power to be restored
Check that plug is securely in wall receptacle
Replace the fuse
Replace the battery
Wait or cancel timer setting

Malfunctions: Unit not cooling or heating (Cooling/ heating models only) room very well while air flowing out from the air cond tioner

Cause:

Inappropriate temperature setting
Air filter is blocked
Doors or Windows are open
Air inlet or outlet of indoor or outdoor unit has been blocked
Compressor 3 minutes protection has been activated

What should be done:

Set temperature correctly. For detailed method please refer to ”Using remote control” section
Clean the air filter
Close the doors or windows
Clear obstructions away first, then restart the unit
Wait

Malfunctions: The unit starts and stops frequently

Cause:

There’s too much or too little refrigerant in the system
Incompressible gas or moisture has entered the system.
The compressor is broken
The voltage is too high or too low

What should be done:

Check for leaks and recharge the system with refrigerant.
Evacuate and recharge the system with refrigerant
Replace the compressor
Install a manostat to regulate the voltage

Issue: Both the indoor unit and outdoor unit make noises

Possible Causes:

Low hissing sound during operation: This is normal and is caused by refrigerant gas flowing through both indoor and outdoor units.
Low hissing sound when the system starts, has just stopped running, or is defrosting: This noise is normal and is caused by the refrigerant gas stopping or changing direction.
Squeaking sound: Normal expansion and contraction of plastic and metal parts caused by temperature changes during operation can cause squeaking noises.

Diagnosis and Solution

EEPROM parameter error diagnosis and solution

Fan speed has been out of control diagnosis

Open or short circuit of temperature sensor diagnosis and solution

IGBT over-strong current protection diagnosis and solution

Over voltage or too low voltage protection diagnosis and solution

High temperature protection of compressor top diagnosis and solution

Inverter compressor drive error diagnosis and solution

Zero crossing detection error

This is alarm signal when the main chip can’t detect over-zero signal. When such failure occurs, the main control board must have fault.

Display function

Icon explanation on indoor display board.

OPERATION indication lamp: This lamp illuminates when the air conditioner is in operation.

AUTO indication lamp: Lights up during the Auto operation.

Ion indication lamp (optional function): Lights up when Clean Air feature is activated and Ionizer can generate abundant anions to fill the room with refreshing and natural air.

TIMER indication lamp: Lights up during Timer operation.

DEFROST indication lamp (For cooling & heating models only): Lights up when the air conditioner starts defrosting automatically or when the warm air control feature is activated in heating operation.

DIGITAL DISPLAY: Displays the current setting temperature and malfunction/protection code when the air conditioner is in operation.

Frequency display: This display is separated into five zones. The zones illuminate based on the compressor current frequency. For example, higher frequency will illuminate more zones.