Carrier X-POWER Series Service Manual page 162

R410A DC Inverter Series
DC generatrix check
1) Check the voltage of DC generatrix, the normal value should be 270 to 360V. If the value is less than
270V, go to next step.
2) Check the wiring connection of rectifier circuit, find out any loose in the circuit, and check the filter board,
single-phase rectifier stack, and three-phase rectifier stack. Note DC and AC switch in the
measurement.
3) If none of the above works, replace the PCB.
Module check
1
2
4
3
1) DC voltage between P and N should be about 1.41 times of the local power supply voltage.
2) DC voltage between 1 and 2 should be 270V to 310V
3) First adjust multi -meter to diode position, put the red pen on the 1 point (N terminal), put black pen on
the 3 or 4 or 5 point, the value should be approximate 0.3, if the value is 0, the IPM is broken. And
then change the red pen to the 2 point (P terminal), the value should be infinity, if the value is 0, the
IPM is broken.
180
5
Carrier service manual
Direction of the current in DC supply
wire is running through the inductor
should be the same as the direction
of arrow marked on the inductor
Troubleshooting