TCL TCA-18HRA/DVO, Техническое руководство, Страница: 79 / 113

DC Inverter Air
When powered‐on the first time, the running light twinkles, while the double‐8 does not lit.
When started‐up normally, the running light lights on, while the double‐8 shows the designed temperature.
When operated normally, the running light lights on, while the double‐8 shows the designed temperature.
When closed down, both LED and double‐8 are gone out.
LED light the state of Timing light
When timing set, the timing light lights on, and the double‐8 flash shows the time setting within 5 seconds, then
shows the designed temperature.
When without time setting, the timing light gone out, while the double‐8 back to the original state.
LED light the state of defrosting/preheat light
When in the state of defrost, oil return, cold‐wind proof, the defrosting/preheat light lights on, while the double‐
8 shows the designed temperature. (One‐driven‐one does not show the oil return state).
When out of the state of defrost, oil return, cold‐wind proof, the defrosting/preheat light gone out, while the
double‐8 shows the designed temperature. (One‐drive‐one does not show the oil return state).
LED light the state of warning light
When double‐8 shows E* or P*, the running lights gone out, while the warning light lights on.
2) Display the faults through the digital tube of outdoor unit. The fault contents refer to the fault indication
table of corresponding outdoor unit. (See the digital tube display information code during the fault protection)
2. Fault Identification: Determine the fault type according to the symptom
The faults of AC system are generally classified into four categories:
1) AC system cannot be started;
2) AC system has a poor cooling effect;
3) The system can be started but it is usually subject to abnormal protective shutdown during the running;
4) Water leakage and noise problem of the indoor unit
Common Troubleshooting:
1) AC system cannot be started
(1) Check the wiring condition of power cables of indoor/outdoor units, and whether the communication cables
of indoor/outdoor units are connected as required;
(2)
check the indicator light of remote receiver panel of indoor unit, digital tube display of outdoor unit, and
check whether there is fault indication of indoor/outdoor units.
2) AC system has a poor cooling effect
(1) Whether the air volume of indoor unit is normal or not? If the air volume is significantly smaller or there is
no wind from the indoor unit, it usually belongs to the following problems:
A. Return air mesh is too dirty;
B. Motor of the indoor unit failed (motor failed, capacitor capacity attenuated)
C. Electric control panel failed, causing no fan output.
(2) Whether the difference between outlet wind temperature of indoor unit and the return wind temperature
of indoor unit is normal or not. The outlet wind temperature difference is 10‐15° under normal cooling
condition, and it is 18‐25° under the normal heating condition.
If there is no problem for the said, it indicates there is no problem for the air conditioner. The reasons
resulted in the poor cooling effect include:
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