Troubleshooting
Samsung Electronics 4-11
4-4-2 When error code " " between main ↔ panel is indicated on the indoor temperature
display area
1. Cause of malfunction
1) Disconnected or loosely connected main ↔ panel connection wire
2) Faulty indoor unit Main PBA
3) Faulty Panel PBA
2. Check procedure
Replace faulty Panel PBA
Re-inspect connection of main ↔
panel PBA wire
Connect Panel PBA and Main PBA
Inspect or replace connector wire
No
Yes
Yes
No
When measuring
numbers 2-3, 2-4 pin test of Panel PBA CN30,
does it fluctuate (during communications)
between DC3V~DC5V?
Is the connection wire
between the main ↔ Panel PBA disconnected
or loosely connected?
<Measure voltage>
Turn on the main power switch.
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