LG Multi V Service Manual

Purpose
Judgment of the Fan IPM part
fault of PCB assembly.
Items for checking
1. Judgment of damage of IGBT
2. Checking the soldering state
■
How to check Fan IPM IGBT (Diode Mode)
1. Remove the connector from PCB.
2. Set the Multi-Tester as Diode Voltage Measurement Mode. (
)
3. Measure the voltages of P~U / P~V / P~W as shown in Fig. 1.
4. Measure the voltages of U~Nu / V~Nv / W~Nw as shown in Fig. 2.
5. If the measurements are significantly different from the levels shown in the figures, the IPM is deemed to
be damaged.
Fan IPM Check
Checking Method for Key Components
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LG Multi V Specifications

General

Type	VRF (Variable Refrigerant Flow)
Compressor Type	Scroll
Refrigerant	R410A
Energy Efficiency	High
Control System	Centralized and individual control options
Indoor Units	Multiple types available (e.g., ceiling cassette, wall-mounted, ducted)