Error No. 50 - LG Multi V5 Service Manual

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
50
Outdoor unit loss
Master: 501
of phase.
Slave 1: 502
Slave 2: 503
Are the power wiring con-
nections correct?
Is the input voltage normal?
Is the main PCB
assembly correct?
Is the noise filter
operating properly and / or
connections correct?
Inverter PCB LED display
Recheck power and installation.
* Measure input voltage.
Details
One or more of R(L1), S(L2), T(L3) input
power line connection(s) is / are missing
for the outdoor unit.
No
Yes
No
Yes
No
Yes
No
Yes
No
error.
Yes
* Noise filter wiring.
T S R
T S R
Due to our policy of continuous product innovation, some specifications may change without notification.
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1. Input voltage is not correct R(L1), S(L2),
T(L3).
2. Power wiring connections may not be correct.
3. Noise filter and / or connection error. Main PCB
may be damaged.
4. Inverter PCB input current sensor error.
Check R(L1) / S(L2) / T(L3) wiring connections.
Check if R~S / S~T / T~R phase voltage is 208-230V ±10%
or in the range of 414-528V for 460V.
power is not correct.
1. Check if R~S / S~T / T~R phase voltage is 208-230V ±10%
or in the 528V range for 460V.
2. Check main PCB assembly; check wiring for disconnections
and damage.
Rewire and / or replace if errors are found.
Replace Inverter PCB assembly.
* Sign of a malfunction.
T S R
* R-Phase terminal
changed color.
T S R
ERROR CODES

Error No. 50

Causes
Images here are representative
of system components. Actual
component appearance depends
on model and system type.
163