Flex 4EX2 / 6EX2 MRX CE Instruction Manual
November 2018
Page 39 of 44
6 Operating Procedures
6.1 General Operation
1. Reset the STOP button located on the top left hand corner of the transmitter by rotating it
clockwise or counterclockwise; the button will pop up. Turn on the transmitter power by
inserting the power switch key and rotating to ON ( I ) position.
2. After turning on the transmitter power, check the Status LED on the transmitter for any
sign of system irregularities (
see Section 6.4.1 Transmitter Status Indications on
page 41
). If the transmitter is in good working order the Status LED will display solid green
for up to 2 seconds at power on (no faults detected).
3. Rotate the power switch key further to the START position and hold it there for up to 2
seconds (Status LED solid green). When the receiver MAIN relays are activated the Status
LED will change from solid green to solid orange (system on). The power switch key will
retract back to the ON ( I ) position when released (Status LED blinks green). The same
START position becomes an auxiliary function thereafter (
see Section 4.2.2.3 START +
AUX Function on page 26
). Press any pushbutton on the transmitter to begin operation.
Pressing any pushbutton before executing the START command at system startup will
result in no signals transmitted (Status LED blinks orange).
4. In case of an emergency, press down the STOP button to disconnect the receiver MAIN
relays and the transmitter power. To resume operation, rotate the STOP button clockwise
or counterclockwise; the button will pop up. Then rotate the power switch key to the
START position for up to 2 seconds to reconnect the receiver MAIN relays. For safety,
executing the START command is required every time the transmitter is turned on or after
every STOP button reset.
5. After 1 or 5 minutes of inactivity (pushbutton not pressed) the receiver MAIN relays are
temporarily disconnected (
see Section 4.1.5 Transmitter Inactivity Timer Settings on
page 22
). Press any pushbutton or execute the START command to resume operation
(
see Section 4.1.4 Transmitter Start Function Settings on page 21
). The receiver
MAIN relays are also temporarily disconnected when the system encounters strong radio
interference, dead spots, low battery condition, and system out of operating range.
6. Turn off the transmitter power by rotating the power switch key counterclockwise to the
OFF ( 0 ) position; it will disconnect the transmitter power and the receiver MAIN relays
altogether. Turn it further counterclockwise to release the key.
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