LG Multi V 5 - Page 70

138 139
_TROUBLE SHOOTING GUIDE BOOK _
- 154 -
Copyright ©2017 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. Failure Receiving Signal Between
Main and Sub Micom
Error No. Error Type Error Point Main Reasons
Failure Receiving Signal
Between Main and Sub
Micom
Communication Error
Between Main and Sub
Micom of External PCB
182*
Master 1821
Slave1 1822
Slave2 1823
Slave3 1824
n Error diagnosis and countermeasure flow chart
Press the
Rest Button
’
*
No
No
Replay
On-boarding
*
Replace External PCB
No
Communication Between
Main-Sub Micom
LED (Yellow) Blinking
* Measuring input voltage
* Noise filter wiring
R(L1) S(L2) T(L3) N
Error No. Error Type Error Point Main Reasons
182*
Communication
Error Between Main
and Sub Micom of
External PCB
Failure Receiving
Signal Between Main
and Sub Micom
1. Failure Receiving Signal Between Main and
Sub Micom
▒
Error Diagnosis and Countermeasure Flow Chart
- 153 -
Copyright ©2017 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Location of 4way valve connector on
Main PCB(marked as 4way,CN09)
** Confirm the 4way valve coil is inserted to the end
* Measure the resistance of 4way valve
**** Check the output voltage of terminal socket
during heating operation
*** 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
Basic Part
Multi V 5
Intorduction
Trouble Shooting
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