York 00497VIP manual Keypad Test

Page 98

Service

KEYPAD TEST

FIG. 49

This diagnostic is used to verify Keypad operation and the Microboard’s ability to respond to a pressed key. Refer to description of Keypad operation in Section 5 of this book.

Procedure

1.Press each keypad key. As the key is pressed, an illuminated LED is displayed corresponding to the key location on the keypad.

2.Press the DIAGNOSTICS key to return to the MAIN DIAGNOSTICS Screen.

Troubleshooting

If an LED is not displayed when a key is pressed, the Keypad, Keypad ribbon cable or Microboard could be defective. Use the following procedure to locate the defective component.

1.Keypad

a.Disconnect the ribbon cable from the Keypad.

b.Identify row/column coordinate of the key to be tested. Refer to Figure 46.

00568VIPC

c. In the Keypad connector, locate the pins of the row/column coordinate of the key of the key to be tested.

d. Insert the leads of an Ohmmeter into the pins identified in step “c” above.

e. Press the key to be tested. If the contact resistance is >100 Ohms, the Keypad is defec- tive.

f. Release the key. If the contact resistance is < 1 Meg Ohm, the Keypad is defective.

2.Ribbon Cable

Using an Ohmmeter, perform a continuity test on all conductors in the ribbon cable. An open circuit would indicate the ribbon Cable is defective.

3.Microboard

There are no checks or measurements to be made on the Microboard. If the Keypad and Ribbon Cable check OK per the above procedures, the Microboard is most likely the cause of the problem.

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YORK INTERNATIONAL

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Contents Remote Control Center Optiview Remote Control CenterGeneral Safety Guidelines Safety SymbolsChangeability of this Document Table of Contents List of Tables List of Figures EU Declaration of Conformity Product Description CHILLER/CONDENSING Control Panels Installation Required Software Version Chiller / Condensing Unit Eproms Optiview Remote Control Center From Optiview RCC Unit Microboard 031-01314-000 031-02050-001 Unit MicroboardWire Sizing Voltage Source FigureGrounding Ground Wire Size FigureWiring Practices Figure Do not drill a control panel to locate conduit con Sides or bottom of the panel and use a conduit drainOperation Setpoints Screen Descriptions and UsageSetpoint / Change Schedule Manual ControlsScreen Navigation Layout This page intentionally left blank to maintain formatting Unit Type Unit Control TemperatureHome Screen Unit StatusUnit # Unit Run Indicator LEDAverage Ambient Temperature Unit Screen Examples Ycal ChillerYcas Chiller Ycws Chiller Unit Screen This page intentionally left blank Systems Screen Examples 00507VIPC Systems Screen Individual System Screen None Hours and Starts Screen Total Starts Operating HoursOptions Screen Ycas Chiller / Ycar ChillerLocal/Remote Control Mode Units Display ModeAmbient Control Mode Language Display ModeTrending Screen TrendingStop Trend SetupStart AxisCollection Interval Trend Setup ScreenChart Type Data Point Min SelectData Point Slot # Data Point MaxThis page intentionally left blank This page intentionally left blank Setpoints Screen Examples 00517VIPC Setpoints Screen Print History Last FaultsHistory Screen Print All HistoriesDown History Details ScreenHistory Printout Number of Units Connected SetupRCC Setpoints Screen Set Date RCC Setup ScreenClock Enabled / Disabled Set TimeComms DiagnosticsUnits PrinterRCC Poll Time 5-30 sec Comms ScreenRS-485 Baud Rate Printer Screen RCC Comms Diagnostics ScreenSoftware Versions Diagnostics I/O Screen Digital InputsDiagnostics RCC Comms Screen Timeout Count Clear CountersDisplay Messages Status MessagesPrinters PrintersSeiko Equipped with an RS-232 Serial interface OkidataWeigh-Tronix Models 2600 Okidata 182, 182 turbo, 184 turboWEIGH-TRONIX Printer ConnectorsHardware required ModelPrinter Setup Automatic Data LoggingLocal/Remote Control Mode Suction Temperature = 42.9 F Discharge Temperature Service IntroductionSystem Architecture Refer to FIGControl Center Microboard Refer toMini-card signature test Fpga configurationFirst initiate table complete Mini-card checksumService York International Bios Eprom U45 Flash Memory Card Bram Bios Eprom Flash Memory Card From Watchdog protection as follows Pins 1-2 RS-232 Pins 2-3 RS-485 JP10 JP26 Not usedMicroboard Program Jumpers JP34, JP35, JP36, JP37 Not Used JP39, JP40, JP41, JP42 Not usedMicroboard Program Switches Tion! Severe compressor or chillerMicroboard Serial Data Communications Ports Configurable Analog Inputs Liquid Crystal Display Ment Displays or supporting components cannot beDisplay Replacement Kit LG Semicon LP104V2 Display refer to Removal InstallationSharp LQ10D367 Display Refer to Removal DISPLAY, Mounting Liquid Crystal Display Assembly LG Semicon LP104V2 Display Sharp LQ10D367 Lamp Replacement 031-01765-002 Display Interface Board031-01765-001 Display Interface Board Display Backlight Inverter Board Inverter Keypad Refer to Figures 45Keypad LD04075 Power Supply Power Supply Offline Diagnostics & Troubleshooting Refer toMain Diagnostics Screen Keypad Test Procedure Display TestBIT Patterns Test Screen RS-485 From Serial Inputs / Outputs TestsFrom From COM 4b102 Digital Inputs / Outputs Tests Analog Inputs Tests System Commissioning Checklist Part Number and Renewal Parts 107 108 109 SI Metric Conversion 110Page ALL Rights Reserved

00497VIP specifications

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