Samsung RF31FM Series Manual page 129

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5. Check the installation status
5-1. Function for failure diagnosis
1) Display function when Panel ⇀ MAIN MICOM communication has error
5-1-2. Display function of Communication error
1-1) If there is no answer for 10 seconds after the panel micom received the requirement of
communication, "Pc - Er" display on the panel PCB will be ON/OFF alternately until the
communication error is canceled. (0.5 sec ALL ON, 0.5 sec ALL OFF alternately)
1-2) "Pc - Er" display on the Pantry Room Display will be ON/OFF alternately until the communication error
is canceled. (0.5 sec ALL ON, 1.5 sec ALL OFF alternately)
2) Display function when Panel ⇀ MAIN MICOM OPTION has error
2-1) "OP - Er" code is repeatedly ON/OFF until Option error settles down.
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