LG Multi V 5 Guide Book

146 147
_TROUBLE SHOOTING GUIDE BOOK _
Is central control addressing
normal?
Is Master/Slave setting
of central controller normal?
< AC Ez only >
"Group No." is set correctly.
(settable range : 0~F)
Check address of All IDU's address
(Duplication & Omission of IDU address)
- All IDUs should have unique central control address
Abnormal
Yes
Normal
No
No
There should be only one Master device on a communication line
- ACP, ACP_BACnet, ACP_LONwork should be set Master device
- The other controller(AC Smart, AC Ez, AC Ez Touch) are settable device
<ex>
1. Try to change Group No. in AC
2. It should be matched with corresponding IDU
<ex>
▒
Address Matching between AC Ez and IDUs
If IDU address is 10~18, Group No. of AC Ez should be 1
▒
Central Control Wiring Diagram(Basic Scene)
▒
Error Diagnosis and Countermeasure Flow Chart
Check
whether the product
(IDU, ODU) is normal or not
without Central controller
Is communication cable
wiring normal?
1. Checking Power source of IDU & ODU
(Circuit Breaker, Electrical wiring)
2. Reset ODU Auto Addressing (refer to Xx page)
3. Check other error state after removing control system
Abnormal
Yes
Normal
No
1. Connect to comm. Port (CH)
2. "BUS Wiring" is mandatory
3. Check the Comm. cable
(disconnection / short / polarity)
<ex>
▒
AC Ez + ACP IV Comm. cable Wiring
4. Check the maximum length of the RS485 line per port
- Total length ≤ 1km
- Length between products(or node) ≤ 200m
5. Check the maximum number of node (PI485 G/W, ACS Product, ODU)
on a RS485 comm. Port
"2X + Y + Z <= 32 EA"
- Multi V ODU : "X" EA
- PI485 (Multi / Single / ERV) : "Y" EA
- Slave Controller : "Z" EA
<ex>
AC Smart Premium(slave) 2ea + Multi V 6ea = 2 + (6*2) = 14 ≤ 32ea
Error No. Error Type Error Point Main Reasons
242* Network Error
Network error of
central controller
1. Communication Wiring defect (Central con
-
troller - ODU)
2. Communication defect between remote con
-
troller and indoor unit
3. Indoor unit addressing setting error on
central controller
▒
AC Ez + AC Smart IV Comm. cable Wiring
Basic Part
Multi V 5
Intorduction
Trouble Shooting
Function Control
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LG Multi V 5 Specifications

General

Type	VRF (Variable Refrigerant Flow)
Refrigerant	R410A
Compressor Type	Inverter Scroll Compressor
Outdoor Unit Fan Type	Axial Fan
Cooling Capacity	22.4 kW to 270 kW
Energy Efficiency	High
Operating Range	Cooling: -5°C to 48°C
Power Supply	380-415V, 50/60Hz
Heat Exchanger Type	Microchannel
Control Type	Centralized Control
Indoor Unit Options	Cassette, Wall Mounted, Ducted
Heat Recovery	Available
Warranty	Varies by region (typically 5 years compressor, 1-2 years parts)