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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)
4) Check the communication cable connection.
2. Check procedure
Turn off the power and turn it on again after 30 seconds.
Is there any communication error?
Yes
Is there power on Inverter PBA?
Is there any problem on
communication cable between outdoor unit inverter
(CN31)
Main PBA (CN39)?
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
PBA is normal
[7-segment on
[Model which uses 3 phase
Main PBA (Common)]
power Inverter PBA LED
confirmation part]
Samsung Electronics
[Check the LED on inverter PBA]
Yes
Yes
Outdoor unit inverter
[Model which uses
1 phase power Inverter PBA
LED confirmation part]
Main PBA (CN39)?
No
Connect the power cable/check the fuse
1. Is there any problem on the power cable between
outdoor unit main
2. Is there any problem on the power cable between
No
outdoor unit inverter
3. Is the fuse (FUSE100) on outdoor unit inverter PBA
normal? (Short-Normal, Open-Abnormal. Only applies to
RD✳✳✳HXH✳ series)
[Check list for model which uses 3 phase power]
1
2
[Check list for model which uses 1 phase power]
No
Check the communication cable connection
[Check list for model which uses 3 phase power]
1
1. Inverter PBA connector part (CN31)
[Check list for model which uses 1 phase power]
Inverter PBA connector (CN31)
Troubleshooting
End service
EMI PBA?
EMI PBA?
2
3
2
2. Main PBA connector (CN39)
MAIN PBA connector (CN39)
25
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