159
Error Codes
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ERROR CODES
Please refer to the Safety Precautions on pages 4-7 for more detail to prevent injury or death regarding the operation and service
troubleshooting of the Multi V product.
WARNING
Error No. 40
Error No. Description Details Causes
40
Master: 401
Slave 1: 402
Slave 2: 403
Outdoor unit
inverter com-
pressor current
transducer (CT)
sensor error.
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.
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).
Are the power wiring connec-
tions correct?
Recheck power and installation.
1. Check R(L1) / S(L2) / T(L3) wiring connec-
tions.
2. Check noise filter wiring connections.
ĺ5HZLUHLIHUURUVDUHIRXQG
No
Yes
Yes
Is the input voltage normal?
Is the inverter compressor PCB
assembly correct?
Yes
No
No
Check if R~S / S~T / T~R phase voltage is
208-230V ±10%, or within the 414-528V range
for 460V.
ĺ&KHFNZLUHVDQGFRQQHFWLRQVLISRZHULVQRW
correct.
Replace inverter compressor PCB assembly.
Measure input voltage.
Inverter compressor PCB assembly.
Images here are representative
of system components. Actual
component appearance depends
on model and system type.
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