163
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. Description Details Causes
50
Master: 501
Slave 1: 502
Slave 2: 503
Outdoor unit loss
of phase.
One or more of R(L1), S(L2), T(L3) input
power line connection(s) is / are missing
for the outdoor unit.
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.
Error No. 50
Are the power wiring con-
nections correct?
Recheck power and installation.
Check R(L1) / S(L2) / T(L3) wiring connections.
ĺ5HZLUHLIHUURUVDUHIRXQG
No
Yes
Yes
Is the input voltage normal?
Is the main PCB
assembly correct?
Yes
No
No
Check if R~S / S~T / T~R phase voltage is 208-230V ±10%
or in the range of 414-528V for 460V.
ĺ&KHFNZLULQJIRUGDPDJHDQGFRQQHFWLRQVLI
power is not correct.
Replace Inverter PCB assembly.
No
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.
ĺ5HDVVHPEOHLIHUURUVDUHIRXQG
Inverter PCB LED display
error.
Yes
* Measure input voltage.
* Noise filter wiring.
* Sign of a malfunction.
* R-Phase terminal
changed color.
TSR TSR
TSR TSR
Images here are representative
of system components. Actual
component appearance depends
on model and system type.
Is the noise filter
operating properly and / or
connections correct?
No
Rewire and / or replace if errors are found.
Yes
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