GREE U-Match 5 SERIES UNIT SERVICE MANUAL
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(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.
3.2.2.2 Method of Testing PFC Module Short Circuit（only for GUD100W/NhA-T, GUD125W/NhA-T,
GUD140W/NhA-T）
(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 as
shown in the following figure to measure the voltage between L1-2 and P; L2-1 and P.
Step 2: Put the red probe on the place N and the black one on the wiring terminal L1-2, L2-1respectively as
shown in the following figure to measure the voltage between N L1-2 and NL2-1.
(3) If the measured voltages between L1-2 and P; L2-1 and P, N and L1-2, N and L2-1 are all among 0.3V-0.7V,
then it indicates the PFC module is normal; If any measured valve is 0, it indicates the PFC is damaged.
GUD100W/NhA-T
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