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TCL Air Conditioner Service Manual
7
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 0 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 5 this control
prolonged until the indoor pipe temperature sensor reads 5 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 50
Outdoor fan ON: when the indoor pipe temperature is 48
Compressor OFF: when the indoor pipe temperature is 62
Compressor ON: when the indoor pipe temperature is 48
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.
In the “I Feel” mode , when the controller receives the up or down single of temperature, the set
temperature can adjust by 1 upper or lower. The biggest you can adjust by 2 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
26 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:
Mode Initial room temperature
COOLING
DRY
HEATING for Heat Pump Type
FAN for Cooling Only Type
26 or more
20 to 25
Less than 20
Initial set temperature
24
18
23
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