
Flex PRO / Flex M Pre-Engineered Radio Control System Instruction Manual
April 2012
Page 40 of 42
Problems Possible Reasons Suggestions
Receiver responds to
the transmitter
inconsistently
The transmitter is going in and
out of range (transmitter and
receiver are on the edge of the
transmission range)
Move the transmitter and the receiver closer
Relocate the receiver antenna to where it is in
more line of sight with the transmitter
The antenna and/or cable on
the receiver is damaged, or
Inspect the antenna on the receiver for damage
and try to place the antenna in a location that is
visible when operating the equipment at all times.
turns off during normal
operation
The transmitter powered down
Extend the inactivity timeout setting for the
The transmitter powered down
Replace the transmitter's batteries.
blinking for more than 3
seconds, followed by the MLC
Radio interference; change the system's channel
setting.
The RF/Message LED stopped
and the MLC Relay turned off
together within 1 sec, possibly
when engaging or disengaging
another relay that is driving a
CPU module is resetting. I
the coils of all contactors to reduce transient
voltages. Ensure that the power module has a
stable power source.
The serial data timeout error
LED (LED #5) on the serial
communication card is lit.
Drive serial communication is
inactive or was inactive for more
than 1 sec. MLC Relay turned
off together when LED is lit.
Error is reset when transmitter issues a start
command. Inspect serial communication wiring
to ensure there are no breaks, poor connections
or damage to the wiring.
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