Outdoor Units (Error Code:e203) - Samsung AM036FXMDCH Service Manual

3-3 Communication error (1 minute) between Main and Sub Micoms of an Outdoor unit or
among Outdoor Units (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
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
Main PBA (Common)]
Samsung Electronics
[Check the LED on inverter PBA]
Yes
Yes
Outdoor unit inverter
[AM FXMDCH series
inverter PBA LED]
No
Connect the power cable/check the fuse
1. Is there any problem on the power cable between
No
outdoor unit main
2. Is there any problem on the power cable between
outdoor unit inverter
[Check list for AM
No
Check the communication cable connection
[Check list for AM
Inverter PBA connector (CN31)
Troubleshooting
End service
EMI PBA?
EMI PBA?
FXMDCH series]
FXMDCH series]
MAIN PBA connector (CN39)
23