Loading ...
Loading ...
Loading ...
188
TROUBLESHOOTING
Compressor Fault Isolation
Judging the connecting terminals of inverter compressor:
It is impossible to identify terminals U, V and W of inverter compressor with multi‑meter. Just connect the terminals in the same
way as the original unit when replacing the compressor. A wrong connection will lead to reverse and loud noise of the compressor.
Resistance of compressor coil:
Measure the resistance between any two terminals, which are about a few Ohms, three phases having the same resistance
Electric FIlter Board Fault Isolation
Visual examination: as the circuit is simple, the connection may be checked visually to see whether any loose or poor connection.
Voltage test: the voltage at the input end shall be the same as the voltage at the output end.
Electrical Communication Fault ISOLATION
Step one: to determine whether the connecting cables and tether cables of indoor/outdoor units are correctly wired. If not, change
wiring order and test connection.
Step two: to determine whether there is loose connection.
Fasten the connection in the case of loose connection and then conduct verification.
Step three: measure the voltage between SI and N with multi‑meter and see whether the voltage fluctuates between 0V and 24V.
Please directly replace indoor and outdoor control boards if there are not voltage fluctuations
Fault Codes
Loading ...
Loading ...
Loading ...