120
MUL
TI V 5 Outdoor Unit Service Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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Power Module (IPM)
1. Shut off main power. After main power is shut off, wait at least
ten (10) minutes until inverter compressor PCB DC voltage is
discharged.
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P Terminal: Black (-)
N Terminal: Red (-)
U Terminal : Red (+)
0.2 ~ 0.6 V
-
V Terminal : Red (+)
0.2 ~ 0.6 V
-
W Terminal : Red (+)
0.2 ~ 0.6 V
-
P Terminal: Red (+)
N Terminal: Red (+)
U Terminal : Black (-)
-
0.2 ~ 0.6 V
V Terminal : Black (-)
-
0.2 ~ 0.6 V
W Terminal : Black (-)
-
0.2 ~ 0.6 V
Table 65: Checking the Inverter IGBT / IPM.
2. Disconnect all IGBT / IPM connections.
3. Set the multi-tester to diode mode.
4. Measured value must be 0.2 ~ 0.6 V as shown in the table
below.
5. If the measured value is different than what is listed in the table
below, then set the multi-tester to resistance mode and measure
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inverter PCB is damaged and needs to be replaced.
After switching off the main power supply and verifying that the DC volt-
age was discharged, wait for at least ten (10) minutes before checking
the electrical components in the control box. There is risk of electric
shock, physical injury or death.
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U
V
W
P
N
WARNING
Figure 57:
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N
P
W
V
U
Figure 58: Location of IGBT / IPM Terminals (Appearances Will Vary
Depending on Model).
