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[3]
Inverter and Compressor
a. Replace only the compressor if only the compressor is found to be defective.
(Overcurrent will flow through the inverter if the compressor is damaged, however, the power supply is automati-
cally cut when overcurrent is detected, protecting the inverter from damage.)
b. Replace the defective components if the inverter is found to be defective.
c. If both the compressor and the inverter are found to be defective, replace the defective components of both devi-
ces.
(1) Inverter related defect identification and countermeasures
Error display/failure condition
Inverter related errors
[1]
(0403, 4200, 4220, 4230, 4240, 4250, 4260, 5110, 5301)
Main power breaker trip
[2]
Main power earth leakage breaker trip
[3]
Only the Compressor does not operate.
[4]
The compressor always vibrates strongly or emits an abnormal noise.
[5]
Noise has penetrated the peripheral device.
[6]
Sudden malfunction
[7]
(as a result of external noise.)
1. Due to a large capacity electrolytic capacitor used in the inverter, voltage still flows through even after cutting the main power, creating
the possibility of electric shock. As a result, wait for a sufficient length of time (5-10 min) after cutting the main power and check the
voltage at both terminals of the electrolytic capacitor to performing any checks on the inverter.
2. Damage will result to the components of IPM, etc. if the inverter wiring is not properly secured with screws, or if the connector has not
been properly inserted. It is likely that any errors occurring after replacing components are the result of wiring mistakes. Ensure that
the wiring, screws, connectors and Faston, etc. are properly inserted.
3. Do not remove or insert inverter connectors with the main power supply on, as this will result in damage to the PCB.
4. The current sensor will be damaged if current flows without connecting to the PCB. Always insert connectors into the corresponding
PCB when running the inverter.
Measure/inspection item
¶ [3] Check the details of the inverter error in the error log at
the outdoor PCB LED monitor display.
¶ [2] Perform the measures corresponding to the error code
and error details determined using the remote control error
display self diagnosis and countermeasures.
a. Check the breaker capacity.
b. Electrical system short circuit or grounding other than the
inverter
c. Refer to 3)-[1] if not a, or b.
a. Earth leakage breaker capacity/sensitivity current check
b. Meg defect for electrical system other than the inverter
c. Refer to 3)-[1] if not a, or b.
• Check the inverter frequency at the LED monitor and
proceed to 2)-[3] if the status is operational .
Go to 2)-[3].
a. Check to ensure that power supply wiring, etc. of the
peripheral device is not in close contact with the power
supply wiring of outdoor unit.
b. Check to ensure that the inverter output wiring is not in
close contact with the power supply wiring and transmission
lines.
c. Check to ensure that the transmission line shield wiring is
being used properly in the necessary environment, and that
the shield wire ground is appropriate.
d. Meg defect for electrical system other than the inverter
e. Attach a ferrite core to the inverter output wiring. (Please
contact the factory for details of the service part settings)
f. Change the power to another system.
g. If this problem occurs suddenly, there is a possibility that
the inverter output is ground ed. Proceed to 2)-[3].
Contact the factory for cases other than those listed above.
a. Check to ensure that the unit is grounded.
b. Check to ensure that the transmission line shield wiring is
being used properly in the necessary environment, and that
the shield wire ground is appropriate.
c. Check to ensure that the neither the transmission line or
external connection wiring run close to another power
supply system or run through the same conduct pipe.
Contact the factory for cases other than those listed above.
–96–
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