LG MULTI V 5 Manual Book page 70

* 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
→ LTE4:1
→ LTS4:2
***** Checking method for outdoor unit of 3unit system
(Master + Slave1 + Slave2)
¿ Close all the SVC valves of high / low pressure
¡ Operate system
¬ Check the difference of high and low pressure with LGMV for each unit (Master, Slave1, Slave2)
√ If there is a unit in which the difference is not increased then the 4way valve of that unit is defective
Copyright ©2017 LG Electronics. Inc. All right reserved.
Only for training and service purposes
138
_TROUBLE SHOOTING GUIDE BOOK
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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LGE Internal Use Only
Error No. Error Type
182*
Error No. Error Type Error Point
Master 1821
Communication Error Failure Receiving Signal
Communication
Slave1 1822 Between Main and Sub Between Main and Sub
Failure Receiving
Micom of External PCB Micom
Slave2 1823 Error Between Main
182* Signal Between Main
and Sub Micom of
Slave3 1824
and Sub Micom
External PCB
n Error diagnosis and countermeasure flow chart
Error Diagnosis and Countermeasure Flow Chart
▒
Communication Between
Main-Sub Micom
LED (Yellow) Blinking
No
'
Press the
*
Rest Button
No
No
Replay
Replace External PCB
*
On-boarding
* Measuring input voltage
* Noise filter wiring
R(L1) S(L2) T(L3) N
Copyright ©2017 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Error Point Main Reasons
Main Reasons
1. Failure Receiving Signal Between
Main and Sub Micom
1. Failure Receiving Signal Between Main and
Sub Micom
- 154 -
LGE Internal Use Only
139
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