Gree GUD100W/NhA-T - IPM, PFC Testing Method; Method of Testing IPM Module

GREE U-Match 5 SERIES UNIT SERVICE MANUAL
51
Filtering Board:
No. Printing Interface No. Printing Interface
1 N-OUT1
Power output neutral wire terminal (for
U-MATCH)
6 E1
Filtering board grounding hole (reserved)
2 N-OUT
Power output neutral wire terminal (reserved
for other models)
7 N Power input neutral wire t erminal
3 L-OUT
Power output live wire terminal (reserved for
other models)
8 AC-L Power input live wire terminal
4 L-OUT1 Power output live wire terminal (for U-
MATCH)
9 DC-BUS DC busbar terminal
5 E Filtering board grounding hole — — —
3.2.2 IPM, PFC Testing Method
3.2.2.1Method of Testing IPM Module
(1) Preparation before test: prepare a universal meter and turn to its diode option, and then remove the wires
U, V, W of the compressor after it is powered off for one minute.
(2) Testing Steps
Step 1: put the black probe on the place P and the red one on the wiring terminal U, V, W respectively as
shown in the following figure to measure the voltage between UP, VP and WP.
Step 2: put the red probe on the place N and the black one on the wiring terminal U, V, W respectively as
shown in the following figure to measure the voltage between NU, NV and NW.
5
6
1
2
3
4
7
8
9