LG MULTI V Service Manual page 99

Fan IPM Check
Judgment of the Fan IPM part
Purpose
fault of PCB assembly.
■ 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.
Checking Method for Key Components
1. Judgment of damage of IGBT
Items for checking
2. Checking the soldering state
)
- 99 -
Copyright © 2020 LG Electronics Inc.
All rights reserved. Only training and service purposes.