GREE U-Match 5 SERIES UNIT SERVICE MANUAL
37
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.
(3). If the measured voltages between UP, VP, WP, NU, NV, NV are all among 0.3V-0.7V, then it indicates the IPM module is normal;
If any measured valve is 0, it indicates the IPM is damaged.
5
⑩
6
⑩
1
1
⑩
2
⑩
3
⑩
4
⑩
7
⑩
8
⑩
9
⑩
