TCL TCA-18HRA/DVO, Technical Manual, Page: 105 / 113

DC Inverter Air
3) Troubleshooting Methods
A. Indoor Temperature Sensor Fault:
Sensor Fault
NO
Use the exclusion method to find out the faults, T1
ambient temperature sensor, T2 evaporator central
temperature sensor
YES
NO
Check Sensor
Use the resistor gear of multi-meter to measure the
resistance of sensor to check whether it corresponds to that
YES
R
eplace
Check main
NO
Use the resistor gear of multi‐meter to measure the pull
control panel
down resistance of circuit sensor interface, usually
YES
Use the DC voltage gear to measure the voltage of
sensor sampling port of IC under the standby state,
Replace MCP
B. Fault of Outdoor Unit
After the failure of outdoor unit, the indoor unit will display the fault of outdoor unit, see the
Troubleshooting of Outdoor Unit for more details.
3.7 System Maintenance
1).
Maintenance of Indoor Unit
1) Clean the Dust Filter Screen
(1) The dust filter screen can eliminate the dust or other particles from the air, and if it is blocked, the
effect of air‐conditioner system will be significantly reduced;
(2) If the indoor unit is mounted in heavy dusty place, the times of cleaning the dust filter screen shall
be increased;
(3) If the dirt is heavy and it is difficult to clean, please replace the dust filter screen;
(4) Replacement Method of Dust Filter Screen:
A. Take off the air intake grill according to the operation methods in the following table.
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