Emerson 20/20 service manual Slide Valve Actuator Troubleshooting Guide Blink Code

Page 77

Section 14 • Slide Calibration

Slide Valve Actuator Troubleshooting Guide Blink Code

Vilter actuators communicate problems discovered by the internal diagnostics to the technician by LED blink codes. Only one blink code is displayed, even though it is possible that more than one problem has been detected. The actua- tor motor will not operate until the error code is cleared by pressing the blue bottom, see Table 14-3. LED Blink Codes and Troubleshooting Guide.

Table 14-3. LED Blink Codes and Troubleshooting Guide (1 of 2)

Flash Pattern

Meaning

* = ON

- = OFF

 

 

 

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

Calibration step 1.

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

Calibration step 2.

 

 

This indicates a zero span. This error can only occur dur-

 

 

ing calibration. The typical cause is forgetting to move

 

 

the actuator when setting the upper limit of the span.

 

 

If this is the case, press the blue button to restart the

 

 

calibration procedure. This error can also occur if either

 

 

or both of the slotted optocouplers are not working. If

 

 

this is the case, the slide valve actuator will have to be

 

 

replaced.

 

 

The operation of the slotted optocouplers can be tested

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

as follows:

1. Manually rotate the motor shaft until the aluminum

 

 

photochopper fence is not blocking either of the opto-

 

 

coupler slots.

 

 

2. Using a digital multimeter, measure the DC voltage

 

 

between terminal 3 of the small terminal block and TP1

 

 

on the circuit board (see Note 1). The measurement

 

 

should be between 0.1 and 0.2 Volts.

 

 

3. Next, measure the DC voltage between terminal 3

 

 

and TP2 on the circuit board. You should measure be-

 

 

tween 0.1 and 0.2 Volts.

 

 

 

 

 

A motor over-speed occurred. At some time during

 

 

operation, the motor armature spun too fast for the

 

 

encoder to measure. A nonfunctional motor brake is

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

usually to blame. This error means that the slide valve

actuator is no longer transmitting accurate position

 

 

information. The actuator should be recalibrated as

 

 

soon as possible, after the cause of the over-speed is

 

 

identified and corrected. This error will not clear until

 

 

the actuator is re-calibrated.

 

 

 

Note 1: TP1 and TP2 are plated-thru holes located close to the slotted optocouplers on the board. They are clearly marked on the board silkscreen legend.

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

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Contents Vission 20/20 micro-controller Page Table of Contents Digital I/O Board Layout Top Status Bar TOCCompressor Sequencing Event List Data Backup List of Tables and Figures END of TOC How to Use This Manual Requirements to Start Compressor Operational Flow ChartsCritical Compressor Run Logic at Compressor Start Compressor Amperage Load LimitingOperational Flow Charts 2 Voltage Source Installation RecommendationsProper Wiring Sizing Mixing Voltages DC signalsGrounding Correct Transformer Wiring Method Wiring MethodsBest Practices Overview Hardware ArchitectureDigital Input/Output I/O Board Description Type Digital I/O 1Refer to -2. Analog Inputs Motor Current Analog InputsAnalog Inputs 1 Digital I/O 2Digital & Analog I/O Boards Layout Analog OutputsDigital I/O Board Layout Analog Inputs 2Digital Output Board Layout Digital Output BoardsDigital Input Board Layout Digital Input BoardsDigital Input-Output Board Layout Digital In-Out BoardsAnalog Input Board Layout Analog Input BoardsAnalog Input Jumper Tables Channel SignalJP-13 JP-14 JP-15 JP-31 Analog Output Board Layout Analog Output BoardsMain Screen Main ScreenTop Status Bar Parameter Bar Unit Start Pop-Up Window Bottom Status Bar Splash Screen Navigation Buttons Menu ScreenMenu Screen Pulse Proportional Control Compressor ControlProportional Band & Setpoint Auto-CycleVFD One-Step Control Method Variable Frequency Drive VFDPumpdown Control Pulldown Control Volume Slide Position Offset Control ModeStop Load and Force Unload Capacity Slide Triggered OutputsLiquid Injection Load AnticipatingOil Control Compressor Control Alarms and Trips Setpoints Alarms and TripsAlarms and Trips Compressor Inhibits Safety Failure MessagesFalse Start Timer Setpoints TimersOil Separator Level #2 Safety Trip Delay Timers Blank Scheduling Setpoint Compressor SchedulingCompressor Scheduling Pressure Control Setpoints Compressor SequencingCFM Equipment List 10 4 / Blank Condenser Control Setpoint Condenser ControlStep Control Step Control Screen VFD Settings11 4 / Blank Digital Outputs Service OptionsAnalog Outputs Instruments Calibration Pressure and Temperature InputsRemote Capacity Motor CurrentAnalog Inputs 13 4 / Blank Capacity Slide Valve Potentiometer Slide CalibrationSlide Valve Actuator Calibration for Optical Style Motors Volume Slide Valve PotentiometerSlide Valve Operation Photochopper Command Shaft Rotation Required By Actuator Command Shaft RotationSlide Valve Troubleshooting Guide 1 Slide Valve Troubleshooting GuideSlide Valve Troubleshooting Guide 2 LED Blink Codes and Troubleshooting Guide 1 Slide Valve Actuator Troubleshooting Guide Blink CodePleted. The actuator will not move while this error code LED Blink Codes and Troubleshooting Guide 2Chart Operation Trend ChartTrend Data Storage Trend Setup Screen Setup15 4 / Blank Event list Columns Event List16 2 / Blank Input/Output Screen Input / Output17 2 / Blank Digital Inputs Auxiliary Input / OutputDigital Outputs Control 18 4 / Blank Time & Date ConfigurationUnits Anti-Recycle CommunicationsTouchscreen Compressor Sequencing Restart On Power FailureLanguage Model & RefrigerantOptional Function Selection Compressor ControlOil Pump Condenser ControlOil Cooling Motor Current DeviceDigital Inputs Analog Inputs Analog Outputs Configuration 19 10 / Blank Save / Load Data BackupData Backup Migrate Factory Reset20 4 / Blank Checklist MaintenanceLog ChartApply User AccessManage Accounts LoginScreen Security Levels Security Access Levels22 4 / Blank Help Screen Screen FeaturesVersion Pop-Up Screen Twin Screw Control Screen Twin Screw ControlOperation Cool Compression Control Screen Cool Compression ControlCool Compression Control Functions Screen Control FunctionsOperational Differences from Single Screw Auto Load TimerCool Compression Control

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