Ipm, Pfc Testing Method - Gree GUHD09NK3FO Service Manual

2). Filtering Board:
1
2
No. Printing
1 N-OUT
3 DC-BUS
5 N
7 E

2.4 IPM, PFC Testing Method

2.4.1 Method 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
Step 2: put the red probe on the place N and the black one on the wiring terminal U, V, W respectively as
(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.
2.4.2 Method of Testing PFC Module Short Circuit(only for GUHD48NK3FO):
(1). Preparation before test: prepare a universal meter and turn to its diode option, and then remove the
wires L1-2, L2-1 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 L1-2, L2-1respectively
Step 2: put the red probe on the place N and the black one on the wiring terminal L1-2, L2-1respectively
Interface
Neutral wire output (white)
DC bus interface (connect
to drive board)
Neutral wire input (white)
Grounding wire (screw hole)
7
No. Printing
2 L-OUT
4 AC-L
6 E1
U-Match Series DC
Inverter Service Manual
6
5
4
3
Interface
Live wire output (red)
Live wire input (red)
(Reserved)
99