LG Multi V Water IV ARNU07GTU 2 Series Service Manual page 89

* Measure the resistance of 4way valve
** Confirm the 4way valve coil is inserted to the end
*** When power is supplied in order as follow
(Slave2 → Slave1 → Mater)
ODU information is displayed one after the other at main PCB 7-segment
1. Model ID
→ 8HP : 8, 10HP : 10, 12HP : 12, 14HP : 14, 16HP : 16, 18HP : 18, 20HP : 20
2. Total Capacity
→ Displayed with HP
3. ODU Type
→ Cooling only :1
→ Heat pump :2
4. Power type
→ 380V : 38
5. Model type
→ LAS4:1
***** Checking method for outdoor unit of 3unit system
(Master + Slave1 + Slave2)
➀ Close all the SVC valves of high / low pressure
➁ Operate system
➂ Check the difference of high and low pressure with LGMV for each unit (Master, Slave1, Slave2)
➃ If there is a unit in which the difference is not increased then the 4way valve of that unit is defective
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Only for training and service purposes
Location of 4way valve connector on
Main PCB(marked as 4way,CN09)
**** Check the output voltage of terminal socket
during heating operation
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Troubleshooting Guide
LGE Internal Use Only