Samsung AC036KNPDEC, Руководство по обслуживанию

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Troubleshooting
Samsung Electronics 4-5
4-3 Troubleshooting by symptoms
4-3-1 Communication error after finishing tracking (E202)
1. Check items
1) Is the communication cable short/open?
2) Is there a response from the indoor unit PCB?
2. Check procedure
No
Yes
Is there a response fro m the indoor unit PCB?
No
Yes
In this case, is the
voltage wavefor m between the lines square
wave with a m plitude over ±0.7V as shown
in the following picture?
+0.7V
-0.7V
Good
Bad
Check the co mm unication cable and
replace the indoor unit PCB?
Re m ove the co mm unication cable
connecting the outdoor unit to indoor unit,
and m easure the signal on LINE 2 of the
outdoor unit with a scope
Reconnect the cable connecting
the outdoor unit to the indoor unit
and restart the unit.
If the co mm unication still doesn’t work,
e h t e c a l p e r indoor unit PCB and
Check the co mm unication
cable in each PCB
and replace the PCB
Yes
Is the power/co mm unication
cable connected correctl y ?
No
Connect the power/co mm unication
cable correctl y .
outdoor unit PCB in order of m ention.
cf.) If there is no oscillo scope, it can be replaced m ulti m eter instead of osillo scope.