Troubleshooting
Samsung Electronics 25
4-3-3 Communication error (1 minute) between Main MICOM of an Outdoor unit INV
(Error Code : E203 )
1. Check items
1) Is there power on outdoor unit inverter PBA?
2) Connect the power cable/check the fuse.
3) Is there any problem on communication cable between outdoor unit inverter (CN31) ↔ Main PBA (CN39)?
4) Check the communication cable connection.
2. Check procedure
Yes
End service
No
Is there any communication error?
Connect the power cable/check the fuse
1. Is there any problem on the power cable between
outdoor unit main ↔ EMI PBA?
2. Is there any problem on the power cable between
outdoor unit inverter ↔ EMI PBA?
3. Is the fuse (FUSE100) on outdoor unit inverter PBA
normal? (Short-Normal, Open-Abnormal. Only applies to
RDSSSHXHS series)
No
Yes
Turn off the power and turn it on again after 30 seconds.
Change the outdoor unit inverter or main PBA
1. If the 7-segment on the outdoor unit main PBA shows E203
error, change the PBA → outdoor unit main PBA is normal
2. When the LED on the outdoor unit inverter is shown as
following; Red-On, Green-On, Orange-Blinking and if the
7-segment on the outdoor unit main PBA does not display
anything, change the main PBA → Outdoor unit inverter
PBA is normal
[Check list for model which uses 1 phase power]
[Check the LED on inverter PBA]
Check the communication cable connection
No
Yes
[Check list for model which uses 3 phase power]
1 2 2 3
[Check list for model which uses 3 phase power]
[Check list for model which uses 1 phase power]
Is there power on Inverter PBA?
1. Inverter PBA connector part (CN31)
1 2
Inverter PBA connector (CN31)
2. Main PBA connector (CN39)
MAIN PBA connector (CN39)
Is there any problem on
communication cable between outdoor unit inverter
(CN31) ↔ Main PBA (CN39)?
[Model which uses 3 phase
power Inverter PBA LED
confirmation part]
[Model which uses
1 phase power Inverter PBA
LED confirmation part]
[7-segment on
Main PBA (Common)]
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