
Flex PRO / Flex M Pre-Engineered Radio Control System Instruction Manual
April 2012
Page 39 of 42
11.3. TROUBLESHOOTING TABLE
Problems Possible Reasons Suggestions
No response when
transmitter push
button is pressed
(Improper startup &
settings)
Transmitter low battery power Check the transmitter battery level.
Emergency stop button
activated prior to startup
Prior to turning on the transmitter power switch
make sure that the red emergency stop button is
elevated.
Improper startup procedure
Redo the startup procedure by holding the power
key at “START” position for up to 2.0 seconds
Incorrect system RF channel
Make sure that the transmitter handset and the
receiver unit both have the same channel.
Incorrect Receiver Access Code
Make sure that the transmitter handset and
receiver unit both have the same Receiver
System out of range
Make sure that the startup procedure is initiated
within 100 meters (300 feet) from the receiver
Receiver will not turn on,
+5VDC CPU/RELAY
LEDs on Power Supply
Module do not light up
Supplied voltage is out of the
acceptable range
Ensure the voltage is 120VAC nominal
Internal fuse has blown on
power supply module
Contact the factory for repair
Internal Power supply on PCB
has a problem
Contact the factory for repair
Receiver will not
respond to the
transmitter
module is blinking 2 times
(communication loss with
transmitter), and RF MSG LED
Make sure the receiver and transmitter unit are
both within range. Also verify that the transmitter
is still on.
module is blinking 1 time
(normal operating WDG), RF
MSG LED does not blink and
RF Signal strength LEDs are
indicating a signal strength.
Make sure the receiver and transmitter unit have
the same access code.
module is blinking 1 time
(normal operating WDG), RF
MSG LED does not blink and
RF Signal strength LEDs are
indicating an erratic signal.
Make sure the receiver and transmitter are both
set to the same channel.
module is blinking 3 times,
read/write error with relay
Make sure that the modules are securely put
together; if the problem persists, contact factory
for repair.
The antenna on the receiver is
missing, 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.
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