LG AMNW07GSJA0 Svc Manual page 109

5. Trouble Shooting
6.7 Troubleshooting Outdoor Error
CH 21 (DC Peak / Comp IPM Fault)
4-Way Valve Check
Judge whether the 4-way valve part
Purpose
has any fault.
■ Checking the output voltage of CN-4way (refer to next page)
1. Set the tester in AC Voltage Mode and check the voltage.
2. Check the output voltage between both ends of CN-4Way Connector.
3. The standard of normal voltage is 220 V ±10 %.
4. If the measurement is different from the standard, replace PCBA.
❈ The measurement should be made at the time to start heating mode operation and at the time of
standby after operation.
■ Check the 4-way.valve coil resistance.
1. Set the tester in Resistance Mode and check the current.
2. Measure the resistance between the both ends of a single unit of 4-Way valve coil.
3. The standard of normal resistance is 14 Ω ±10 %.
4. If the measurement is different from the standard, replace 4-Way valve coil.
! Caution : When the measurement is made in the state that the electricity is applied, check the tester
for being in the measurement mode and be careful to avoid possible short of the parts other
than the measuring part.
1. Check the working voltage of the 4-way
Items for checking
valve.
2. Check the 4-way valve coil resistance.
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