Maxon Split Air Conditioner Error Codes
SELF DIAGNOSIS FUNCTION
Our company provides the end-users with thoughtful services by installing various diagnostic systems to indicate the following irregular performances.
Check code-Diagnosis of malfunction
FAULT F6- PG motor faults
FAULT F7-Indoor TEMP sensor faults
FAULT F8-Indoor coil pipe TEMP sensor faults
FAULT F9-Outdoor coil pipe TEMP sensor faults
Items to be checked first
1. Is the voltage of the power correct? The input voltage shall be rating voltage 10%. The air conditioner may not operate properly if the voltage is out of this range.
2. Is the link cable connecting the indoor unit and the outdoor unit linked properly? Please refer to the “wiring diagram” Check the terminals if the indoor unit and outdoor unit are properly linked by the same number of cables.
3. When a problem occurs due to the contents illustrated in the table below, it is symptom not related to the malfunction of the air conditioner.
Operation of air conditioner
In COOL operation mode, the compressor does not operate at a room temperature higher than the setting temperature that the indoor fan should operate. In a HEAT operation mode, the compressor does not operate at a room temperature lower than the setting temperature that indoor fan should operate.
Explanation
It happens after a delay of 3 minutes when the compressor is reoperated. The same phenomenon occurs when a power is on. As a phenomenon that the compressor is reoperated after a delay of 3 minutes, the indoor fan is adjusted automatically with reference to a temperature of the air blow.
Operation of air conditioner
Fan speed setting is not allowed in AUTO or DRY mode.
The speed of the indoor fan is set to low in DRY mode. Fan speed of 3 steps is selected automatically in AUTO mode.
Operation of air conditioner
Compressor stops operation intermittently in DRY mode
Explanation
Compressor operation is automatically controlled in DRY mode depending on the room temperature and humidity.
Operation of air conditioner
Compressor of the outdoor unit is operating although it is turned off in HEAT mode.
Explanation
When the unit is turned off while de-ice is activated, the compressor continues operation for up to 10 minutes(maximum) until the deice is completed.
Operation of air conditioner
Timer indicator lamp lights up and the air conditioner does not operate.
Explanation
Timer is being activated and the unit is in ready mode. The unit operates normally if the timer operation is cancelled.
Operation of air conditioner
The compressor and indoor fan stop intermittently in HEAT mode.
Explanation
The compressor and indoor fan stop intermittently if room temperature exceeds a setting temperature in order to protect the compressor from overheated air in HEAT mode.
Operation of air conditioner
Indoor fan and outdoor fan stop intermittently in HEAT mode.
Explanation
The compressor operates in a reverse cycle to remove exterior ice in HEAT mode, and indoor fan and outdoor fan do not operate intermittently for within 20% of the total heat operation.
Operation of air conditioner
The compressor stops intermittently in COOL mode or DRY mode, and fan speed of the indoor unit decreases.
Explanation
The compressor stops intermittently or the fan speed of the indoor unit decreases to prevent inside/outside air frozen depending on the inside/outside air temperature.
