Error No. 40 - 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
40
Outdoor unit
inverter com-
Master: 401 pressor current
transducer (CT)
Slave 1: 402
sensor error.
Slave 2: 403
Are the power wiring connec-
tions correct?
Is the input voltage normal?
Is the inverter compressor PCB
assembly correct?
Recheck power and installation.
Measure input voltage.
Details
Disconnection or short circuit of outdoor
unit inverter compressor current detection
(CT) sensor.
MICOM input voltage is not within 2.5V
±0.3V at initial power up.
No
Yes
No
Yes
No
Yes
Inverter compressor PCB assembly.
Due to our policy of continuous product innovation, some specifications may change without notification.
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ERROR CODES
1. Input voltage is not correct (T-S).
2. Damaged DC power component (DC 5V).
3. Outdoor unit inverter PCB is damaged (CT
sensor component).
1. Check R(L1) / S(L2) / T(L3) wiring connec-
tions.
2. Check noise filter wiring connections.
Check if R~S / S~T / T~R phase voltage is
208-230V ±10%, or within the 414-528V range
for 460V.
correct.
Replace inverter compressor PCB assembly.

Error No. 40

Causes
Images here are representative
of system components. Actual
component appearance depends
on model and system type.
159