Maintenance notes of FREQUENTIS3020S interphone system
1. Check Rx-Main/Tx-Main/Rx-Stby/Tx-Stby in the column of setting RIF,Main-Stby installed through TMCS. For the configured seats, M and S buttons appear in the channel TX and M and S buttons appear in RX. You can select M or S manually, not together. Check Separate stanby RIF, and the RAIF03a and RAIF03b where the RIF interface board is located will show a red alarm at the same time. After entering, the alarm is PWR power alarm, but it does not affect normal use. When Separate stanby RIF is unchecked, the alarm disappears.
