58
Installation and Maintenance
Service Manual
Checking method
Use the diode notch of universal meter to check the power (this is only for checking if the IGBT1~IGBT6 and continuous-ow Di1~Di6
inside the module are damaged)
Process
a. Disconnect the connecting wire of compressor;
b. Put the black pole of universal meter onto “P” end of IPM module (this end connects to the positive pole of high-pressure electro-
lytic capacitor); use the red pole to touch the 3-phase end of compressor, and read the value of universal meter respectively, if the
value is within 0.3V~0.8V, it means this part is normal.
Put the black pole to
this P end
Use the black pole to touch the 3-phase
end of compressor respectively
Put the red pole to this N
end
Use the black pole to touch the 3-phase end of compressor
respectively
d. After the above measurement, you will get 4 numerical values, if any one of them is not within the range of 0.3V~0.7V, it means
the IPM module is damaged.
Notices: during the measurement, please make sure that the battery of universal meter is sufcient and the pole has touched the
end (there may be glue in the surface of mainboard for damp proong, which may cause invalid touch of the pole).
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