Emerson Vission 20/20 Operation And Service Manual page 102

Section 14 • Slide Calibration
Table 14-3. LED Blink Codes and Troubleshooting Guide (2 of 2)
* = ON
*--*--*-----------------
*********************
-********************
*****----*--------------
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 – 10
Flash Pattern
- = OFF
Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 2.0
Meaning
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.