Section 14 • Slide Calibration

Table 14-3. LED Blink Codes and Troubleshooting Guide (2 of 2)

Flash Pattern

Meaning

* = ON

- = OFF

 

 

 

 

 

 

The motor is overheated. The actuator motor will not

 

 

run until it cools. Once the motor cools, the actuator will

 

 

resume normal operation.

 

 

Motor overheating is sometimes a problem in hot

 

 

humid environments when process conditions demand

*--*--*-----------------

that the slide valve actuators reposition often. Solutions

are available; consult your Vilter authorized distributor

 

 

for details.

 

 

Another possible cause for this error is a stuck motor

 

 

thermal switch. The thermal switch can be tested by

 

 

measuring the DC voltage with a digital multimeter be-

 

 

tween the two TS1 wire pads (see Note 2). If the switch

 

 

is closed (normal operation) you will measure 0 Volts.

 

 

 

 

 

The 24V supply voltage is low. This will occur momen-

 

 

tarily when the actuator is powered up and on power

 

 

down.

*********************

If the problem persists, measure the voltage using a

digital multimeter between terminals 3 and 4 of the

 

 

small terminal block. If the voltage is less than 24V, the

 

 

problem is in the supply to the board.

 

 

If the voltage is >= 24V, replace the actuator..

 

 

 

 

 

The EEPROM data is bad. This is usually caused by loss of

 

 

24V power before the calibration procedure was com-

-********************

pleted. The actuator will not move while this error code

is being displayed. To clear the error, calibrate the actua-

 

 

tor. If this error has occurred and the cause was not loss

 

 

of 24V power during calibration, the EEPROM memory

 

 

is bad and the actuator will need to be replaced.

 

 

 

*****----*--------------

Microcontroller program failure. Please notify your

Vilter authorized distributor.

 

 

 

Note 2: The TS1 wire pads are where the motor thermal switch leads solder into the circuit board. They are clearly marked on the board silkscreen legend and are oriented at a 45° angle.

14 – 8

Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153

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Emerson 20/20 LED Blink Codes and Troubleshooting Guide 2, Pleted. The actuator will not move while this error code

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