Owners manual MELEX 4XX MELEX 2021/01
30
Speed controller model 1232xx, 1234xx - with AC motor
Speed controllers models 1234xx are equipped with two diodes: red and yellow (or one bicolor
in 1232xx). After key-switch is on, if the controller is ready to work, the yellow diode is on
(one single flash every few seconds) or error (reason) that causes the controller’s blockade and
is signalized by diodes with double code of flash.
Red diode signals position of error status and yellow diode signals error code on the position.
For example:
Error code 2.3 is signalized as follow:
The first digit of the error code:
1. Single flash of the red diode - first digit of the error code
2. Double flash of the yellow diode - means the error code number = 2
The second digit of the error code:
1. Double red diode flash - second digit of the error code
2.Triple yellow diode flash - means the error code number = 3
Summary 2,3- Now you should look into troubleshooting chart for code description:
●● ●●●
“Too low battery voltage - charging required”
Types of LED display
LED indication Status
Neither LED illuminated Controller is not powered on; or vehicle has dead battery;
or controller is damaged
Yellow LED flashing Controller is operating correctly
Yellow and Red LEDs both on solid
Controller is in Flash program mode
Red LED on solid Control system error - reset ignition key
Red and yellow LEDs flashing
alternately
Controller has detected a fault
Table 5-4-1
Signal code of flashing diode Reason for the speed controller’s inaction
1,2 ● ●●
Controller’s overloading or motor short circuit
1,3 ● ●●●
Error of the current sensor measure in the controller
1,4 ● ●●●●
Loading between the battery and B+ terminal of the controller
1,5 ● ●●●●●
Forbidden work of the controller in temp. below -40⁰C
1,6 ● ●●●●●●
Forbidden work of the controller in temp. above +95⁰C
1,7 ● ●●●●●●●
Too low battery voltage or contactor is not connected
1,8 ● ●●●●●●●●
Too high battery voltage
2,1 ●● ●
Controller is used in temp. below -25⁰C
2,2 ●● ●●
Controller is used in temp. above +85⁰C
2,3 ●● ●●●
Too low battery voltage. Charge the battery
2,4 ●● ●●●●
Too high battery voltage
2,5 ●● ●●●●●
Too high source loading +5V (pin 26)
2,6 ●● ●●●●●●
Output overloading (pin 19)
2,7 ●● ●●●●●●●
Output overloading (pin 20)
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