Soleus Air KFTHP-18, KFTHP-09, KFTHP-12, KFTHP-24 service manual Electronic Controller

TCL Air Conditioner Service Manual

Electronic Controller

1.Safety Control

(1)Time Delay Safety Control

3 minutes delay for compressor---The compressor is ceased for 3minutes to balance the pressure in the refrigeration cycle in order to protect the compressor.

2 minutes delay for 4-way valve---The 4-way valve is ceased for 2 minutes to prevent the refrigerant-gas abnormal noise when the HEATING operation is OFF or switch to the other operation mode.

(2) Indoor Pipe Temperature Sensor Frost Prevention Control

When the indoor pipe temperature sensor reads 32℉ or below for 5 minutes, the indoor pipe temperature sensor frost prevention control starts. The compressor and outdoor fan stop and indoor fan operates at high speed for 3 minutes. After that, if the indoor pipe temperature sensor reads less than 41℉ this control prolonged until the indoor pipe temperature sensor reads 41℉ or more.

(3)High Temperature Protection Control

During HEATING operation, the outdoor fan motor and compressor are controlled by the indoor pipe temperature to prevent the high temperature of compressor.

Outdoor fan OFF: when the indoor pipe temperature is ≥122℉

Outdoor fan ON: when the indoor pipe temperature is ≤118.4℉

Compressor OFF: when the indoor pipe temperature is ≥143.6℉

Compressor ON: when the indoor pipe temperature is ≤118.4℉

2.“I Feel” Mode Operation

(1)When the “I Feel” mode is selected, the operation mode and initial set temperature are determined by the initial room temperature at start-up of the operation except to turn off the air conditioner and operates it again.

(2)If the mode is change to “I Feel” mode from other mode, the “I Feel” mode doesn’t operate until compressor stop for more than 3 minutes.

Mode	Initial room temperature	Initial set temperature
COOLING	78.8℉ or more	75.2℉
DRY	68℉ to 77℉	64.4℉
HEATING for Heat Pump Type	Less than 68℉	73.4℉
FAN for Cooling Only Type

In the “I Feel” mode , when the controller receives the up or down single of temperature, the set

temperature can adjust by 33.8℉ upper or lower. The biggest you can adjust by 35.6℉ upper or lower.

3.“COOLING” Mode Operation

(1)When the COOLING mode is selected without setting temperature, the system will set the set temperature at

78.8℉ automatically with the AUTO FAN speed.

(2)When selecting the COOLING mode operation, the system will operate according to the setting by the remote controller and the operation is as following:

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