LG Multi V5 Service Manual page 175

Please refer to the Safety Precautions on pages 4-7 for more detail to prevent injury or death regarding the operation and service
WARNING
troubleshooting of the Multi V product.
Error No. Description
71
Outdoor unit
Master: 711
converter CT
Slave 1: 712
sensor error.
Slave 2: 713
Are the power wiring
connections correct?
Is the input voltage
Is the converter PCB
assembly correct?
Recheck power and installation.
Measure Input Voltage.
MICOM input voltage isn't within 2.5V±0.3V at
initial power up.
No
Yes
No
normal?
Yes
No
Yes
Converter PCB Assembly.
Due to our policy of continuous product innovation, some specifications may change without notification.
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Details
1. Input voltage is not correct (R-T).
2. Damage to the outdoor unit converter PCB
1. Check R / S / T / N wiring connections
2. Check noise filer wiring connections.
1. Check if R-T / T-S / S-T phase voltage is
208-230V ± 10% or in the 414-528V range for
460V.
2. Check wiring and connections.
Replace converter PCB.
ERROR CODES
Error No. 71
Causes
(CT sensor component).
Images here are representative of system
components. Actual component appearance
depends on model and system type.
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