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AAON RSMV ASM01686, Technical Manual

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RSMV Technical Guide 

TABLE OF CONTENTS

OVERVIEW ....................................................................................................................... 5

RSMV Overview

 ...................................................................................................................................................... 5

RSMV Dimensions

 .................................................................................................................................................. 6

INSTALLATION AND WIRING ......................................................................................... 7

Electrical and Environmental Requirements 

 .......................................................................................................... 7

WIRING ............................................................................................................................ 8

RSMV Inputs Wiring

 ................................................................................................................................................ 8

RSMV Outputs Wiring

 ............................................................................................................................................. 9

INPUTS AND OUTPUTS ................................................................................................ 10

RSMV Module Inputs/Outputs Map

 ...................................................................................................................... 10

RSMV Inputs and Outputs

 .....................................................................................................................................11

SEQUENCE OF OPERATIONS ....................................................................................... 12

Cooling Mode and Dehumidification Operation

 .................................................................................................... 12

Electronic Expansion Valve Operation and Head Pressure Control

 ..................................................................... 13

RSMV LCD SCREENS .................................................................................................... 14

LCD Display Screen and Navigation Keys

 ............................................................................................................ 14

Main Screens Map and RSMV Module Screens

 ................................................................................................... 15

System Status Screens ......................................................................................................................................... 16
Sensor Status and Setpoint Status Screens ......................................................................................................... 17
Setpoint Status Screens and Alarms Screen ........................................................................................................ 18
Alarm History and Protected Screens ................................................................................................................... 19

Diagnostic Screens

 ............................................................................................................................................... 20

Diagnostic, Alarm Count, and Address Screens

 ................................................................................................... 21

TROUBLESHOOTING .................................................................................................... 22

RSMV LED Diagnostics

 ........................................................................................................................................ 22

Suction Pressure Transducer Testing ................................................................................................................... 23
Temperature Sensor Testing ................................................................................................................................. 24
Head Pressure Transducer ................................................................................................................................... 25

APPENDIX A: CONDENSER OPTIONS ......................................................................... 26

Single Condenser Configuration

 ........................................................................................................................... 26

APPENDIX B: PRISM 2 SYSTEM CONFIGURATION .................................................... 30

System Configuration

 ............................................................................................................................................ 30

Summary of Contents for RSMV ASM01686

Page 1: ...RSMV Technical Guide ...

Page 2: ...Rev 01D February 14 2021 Updated part numbers alarms and alarm history Prism 2 Screens and RSMV label Added figure table content pages part description table and wiring consideration content and Fahrenheit Celsius temperature conversion Removed VFD test screens This manual is also available for download from www aaon com VCCX2 or www aaon com controlsmanuals where you can always find the latest li...

Page 3: ...sure Control 13 RSMV LCD SCREENS 14 LCD Display Screen and Navigation Keys 14 Main Screens Map and RSMV Module Screens 15 System Status Screens 16 Sensor Status and Setpoint Status Screens 17 Setpoint Status Screens and Alarms Screen 18 Alarm History and Protected Screens 19 Diagnostic Screens 20 Diagnostic Alarm Count and Address Screens 21 TROUBLESHOOTING 22 RSMV LED Diagnostics 22 Suction Press...

Page 4: ... 25 FIGURES Figure 1 Refrigerant System Module Dimensions 6 Figure 2 RSMV Inputs Wiring 8 Figure 3 RSMV Outputs Wiring 9 Figure 4 LCD Display and Navigation Keys 14 Figure 5 RSMV LED Locations 22 Figure 6 Prism 2 Condenser Configuration Single Condenser Per Module 26 Figure 7 Prism 2 Condenser Configuration Single Condenser Per Two Modules 27 Figure 8 Prism 2 Condenser Configuration Single Condens...

Page 5: ...pages 8 9 for wiring The RSMV Module provides the following Modulates the Compressors to satisfy the Suction Coil Saturated Temperature The Suction Coil Saturated Temperature Setpoint is reset by the VCCX2 Controller to maintain the Supply Air Temperature during Cooling Mode During Dehumidification Mode it controls the Compressors to the Suction Saturation Temperature Setpoint Modulates the Conden...

Page 6: ...G GND 24 VAC POWER ONLY WARNING POLARITY MUST BE OBSERVED OR THE CONTROLLER WILL BE DAMAGED NOT USED 5 V 5 V COIL TEMP 1 COMP STATUS 1 SP HP COIL TEMP 2 COMP STATUS 2 GND GND NOT USED NOT USED GND TEMP 3 GND COIL TEMP SENSORS BINARY INPUTS E BUS RSM FOR VFD COMPRESSORS www aaon com SUCTION PRESSURE SENSOR HEAD PRESSURE SENSOR E BUS EXPANSION VALVE 1 EXPANSION VALVE 2 WHITE BLACK RED GREEN WHITE BL...

Page 7: ...l sensors should be 24 gauge Some sensors require 2 conductor wire and some require 3 or 4 conductor wire 5 Minimum wire size for 24 VAC thermostat wiring should be 22 gauge 6 Be sure that all wiring connections are properly inserted and tightened into the terminal blocks Do not allow wire strands to stick out and touch adjoining terminals which could potentially cause a short circuit 7 When commu...

Page 8: ...ooling and Heat Pump mode the VCCX2 resets the Suction Coil Saturated Temperature Setpoint to maintain a given supply air temperature setpoint In Dehumidification mode the Suction Coil Saturated Temperature Setpoint is a user configurable setpoint that can be reset based on indoor humidity levels SP GND V BK RD WH HP GND V BK RD WH S P S UCTION RESSURE ENSOR H P S BY OTHERS EAD RESSURE ENSOR REFRI...

Page 9: ...ccumulating in the sensor Figure 3 RSMV Outputs Wiring 18 30 VAC GND Line Voltage Size Transformer For Correct Total Load RSMV 18 VA NOTE ALL RELAY OUTPUTS ARE NORMALLY OPEN AND RATED FOR 24 VAC POWER ONLY 1 AMP MAXIMUM LOAD CONDENSER ENABLE COMPRESSOR 2 ENABLE COMPRESSOR 1 ENABLE 24 VAC ONLY RLY1 RLY3 RLY2 COMM RD WH BK GRN RD WH BK GRN EXPANSION VALVE 1 EXPANSION VALVE 2 COM MODULATING COMPRESSO...

Page 10: ...ressure Sensor HP 3 Coil Suction Line Temperature Sensor 1 TEMP1 4 Coil Suction Line Temperature Sensor 2 TEMP2 Binary Inputs 1 Compressor Status 1 BIN1 2 Compressor Status 2 BIN2 Analog Outputs 0 10 VDC 1 Modulating Compressor AOUT1 2 Condenser Fan Signal AOUT2 Stepper Motor Outputs 1 Expansion Valve 1 EXV 1 2 Expansion Valve 2 EXV 2 Binary Outputs 24 VAC 1 Compressor 1 Enable Relay R1 2 Compress...

Page 11: ...rive the Expansion Valves to maintain a given Superheat Setpoint BIN1 Compressor Status 1 When this wet contact input closes a 24 volt signal to Binary Input 1 indicates that Compressor 1 is running Typically the source for this is a relay output from the compressor VFD drive If Binary Input 1 opens Compressor 1 Enable Relay will de energize and a Compressor Alarm will be generated BIN2 Compressor...

Page 12: ...ill be required for each fixed compressor or each fixed compressor tandem pair in order to monitor the suction saturated temperature and control the compressor s accordingly Each RSMV will independently activate and stage its compressor s to maintain that circuit s Suction Saturated Temperature Setpoint The staging of compressors on an RSMV is subject to Stage Up and Stage Down Delays as well as c...

Page 13: ...igured for an Air Cooled Condenser A Condenser Relay is commanded on when the first compressor is enabled except if the unit is in Heat Pump Defrost Mode On an Air Cooled Unit the Condenser Fan will be controlled with 0 10 VDC output signal When the Condenser Signal first activates it maintains at 100 for 10 seconds In the Cooling Mode the Condenser Signal will modulate to maintain the Cooling Hea...

Page 14: ...iptions Figure 4 LCD Display and Navigation Keys Table 3 Navigation Key Functions Navigation Key Key Function MENU Use the MENU key to move through screens within Main Menu categories and return to the Main Menu while at other screens UP Use this key to adjust setpoints and change configurations DOWN Use this key to adjust setpoints and change configurations ENTER Use the ENTER key to navigate thr...

Page 15: ... through SYSTEM STATUS Screens Press to go to SENSOR STATUS Screens SENSOR STATUS Press to scroll through SENSOR STATUS Screens Press to go to ALARMS Screens ALARMS Press to scroll through ALARMS Screens Press to go to ALARM HISTORY Screens ALARM HISTORY Press to scroll through ALARM HISTORY Screens Press to go to SETPOINT STATUS Screens SETPOINT STATUS Press to scroll through SETPOINT STATUS Scre...

Page 16: ...re OFF COOL HEAT DEHUMID FORCE COMP A1 D1 OFF MODULATING COMPRESSOR A1 B1 C1 D1 based on board address OFF MOD POSITION OFF Compressor is off MODULATING PERCENTAGE 0 100 COMP A2 D2 ON OFF COMPRESSOR A2 B2 C2 D2 based on board address ON OFF FORCE ON Compressor is on OFF Compressor is off COND FAN NOT USED OFF MODULATING CONDENSER FAN NOT USED OFF MOD POSITION OFF Condenser is off MODULATING PERCEN...

Page 17: ...ough the screens SENSOR STATUS SUCTION XXX PSI SUCTION PRESSURE READING FROM INPUT HEAD XXX PSI HEAD PRESSURE READING FROM INPUT SUPRHT 1 XXºF CURRENT SUPERHEAT 1 CALCULATION SUPRHT 2 XXºF CURRENT SUPERHEAT 2 CALCULATION COIL 1 XXºF COIL TEMPERATURE 1 READING FROM TEMPERATURE SENSOR INPUT COIL 2 XXºF COIL TEMPERATURE 2 READING FROM TEMPERATURE SENSOR INPUT CALC CT XXºF CALCULATED COIL TEMPERATURE ...

Page 18: ...during the first 10 minutes The system will shut down and will retry after 5 minutes LOW SUPERHEAT 2 SH2 DETECTED This alarm will be activated when the Superheat is less than 4ºF for 2 minutes during normal operation or for 4 minutes during the first 10 minutes The system will shut down The system will shut down and will retry after 5 minutes HIGH SUPERHEAT 1 SH1 WARNING If superheat is above 25ºF...

Page 19: ...ollows in order of the way they are listed in the prior ALARMS screen section LOW SP Low Suction Pressure UNSAFE SP Unsafe Suction Pressure SP SENSE No Suction Pressure Sensor Detected HIGH HP High Head Pressure HP SENSE No Head Pressure Sensor Detected CL TMP1 Coil Temp 1 Failure CL TMP2 Coil Temp 2 Failure COMP1 FL Compressor 1 Failure COMP2 FL Compressor 2 Failure LOW SH1 Low Superheat 1 LOW SH...

Page 20: ...t due to power loss EEPROM HOLD DOWN TO LOAD DEFAULTS SP A VLT X XX SUCTION PRESSURE SENSOR VOLTAGE Displays the current voltage of the Suction Pressure Sensor HP A VLT X XX HEAD PRESSURE SENSOR VOLTAGE Displays the current voltage of the Head Pressure Sensor BIN1 BIN4 ON OFF BINARY INPUTS 1 4 Displays the current status of each Binary Input TMP1 VLT X XX COIL TEMPERATURE SENSOR 1 VOLTAGE Displays...

Page 21: ...screens will appear RLY 1 4 ON OFF RELAYS 1 4 FORCE MODE Press the UP and DOWN buttons to select ON or OFF for each relay AOUT 1 V 0 0 10 0 vdc MODULATING COMPRESSOR FORCE MODE 0 0 to 10 0 Active Force Mode Press the UP and DOWN buttons to increase and decrease the value AOUT 2 V 1 0 10 0 vdc CONDENSER FAN FORCE MODE 1 0 to 10 0 Active Force Mode Press the UP and DOWN buttons to increase and decre...

Page 22: ...iagnostic LEDs STATUS If the software is running this LED should blink at a rate of 1 blink per second ALARM on board If the module does not receive communications for more than 1 minute this LED will light up the relays will turn off and the Analog Outputs will go to 0 VDC ALARM above LCD display This red LED will light up and stay lit when there is an alarm present The type of alarm will display...

Page 23: ... compare it to the appropriate chart depending on the refrigerant you are using If the temperature voltage or pressure voltage readings do not align closely with the chart your Suction Pressure Transducer is probably defective and will need to be replaced See Table 4 for Suction Pressure Transducer Coil Pressure Temperature and Voltage Chart for R410A Refrigerant testing The charts show a temperat...

Page 24: ...low the notes and instructions that appear after the chart when checking sensors Table 5 0 5V Temperature Sensor Voltage Resistance for Type III Sensors Temperature Resistance Voltage for Type III 10 K Ohm Thermistor Sensors Temp ºF Temp ºC Resistance Ohms Voltage Input VDC Temp ºF Temp ºC Resistance Ohms Voltage Input VDC 10 23 3 93333 4 51 72 22 2 11136 2 635 5 20 6 80531 4 45 73 22 8 10878 2 60...

Page 25: ...P terminal See Table 6 below Head Pressure Transducer Chart Voltage Pressure Voltage Pressure 0 5 0 2 6 350 0 6 17 2 7 367 0 7 33 2 8 384 0 8 50 2 9 400 0 9 67 3 0 417 1 0 83 3 1 434 1 1 100 3 2 450 1 2 117 3 3 467 1 3 133 3 4 484 1 4 150 3 5 500 1 5 167 3 6 517 1 6 183 3 7 534 1 7 200 3 8 550 1 8 217 3 9 567 1 9 233 4 0 584 2 0 250 4 1 600 2 1 267 4 2 617 2 2 283 4 3 634 2 3 300 4 4 650 2 4 317 4...

Page 26: ...denser Per One Module wiring configuration the Condenser Signal is wired toAO2 and the Condenser Relay RLY3 is enabled Refer to Figure 6 below for Prism 2 configuration Modular Service Tool Screen RSMV Condenser Options Configuration Screen RSM 1 4 CONFIGURATION Condenser Options 1 Cond per 1 RSMV USE or TO CHANGE Select the 1 Condenser per 1 RSMV option on the above Hand Held Service Tool Screen ...

Page 27: ... 4 modules the Condenser Signal is wired toAO2 on the 1st and 3rd modules but not the 2nd and 4th modules and the Condenser Relay RLY3 is enabled on the 1st and 3rd modules but not the 2nd and 4th modules Refer to Figure 7 below for Prism 2 configuration Figure 7 Prism 2 Condenser Configuration Single Condenser Per Two Modules Modular Service Tool Screen RSMV Condenser Options Configuration Screen...

Page 28: ... modules and the Condenser Relay RLY3 is enabled on the 1st module but not the 2nd 3rd modules Refer to Figure 8 below for Prism 2 configuration Figure 8 Prism 2 Condenser Configuration Single Condenser for Three Modules Modular Service Tool Screen RSMV Condenser Options Configuration Screen RSM 1 4 CONFIGURATION Condenser Options 1 Cond for 3 RSMVs USE or TO CHANGE Select the 1 Condenser for 3 RS...

Page 29: ...modules and the Condenser Relay RLY3 is enabled on the 1st module but not the 2nd 3rd or 4th modules Refer to Figure 9 below for Prism 2 configuration Figure 9 Prism 2 Condenser Configuration Single Condenser for Four Modules Modular Service Tool Screen RSMV Condenser Options Configuration Screen RSM 1 4 CONFIGURATION Condenser Options 1 Cond for 4 RSMVs USE or TO CHANGE Select the 1 Condenser for...

Page 30: ... Selection Two Step Timing Compressor Configurations Make selection from the drop down menu for Module A see Figure 11 Note Danfoss compressors are not compatible with the RSMV For the remaining modules select the appropriate compressor Select No Compressor Configured when there are no additional compressors APPENDIX B PRISM 2 SYSTEM CONFIGURATION System Configuration Figure 11 RSMV Module A Compr...

Page 31: ...31 RSMV Technical Guide NOTES ...

Page 32: ...10204 AAON Factory Technical Support 918 382 6450 techsupport aaon com AAON Controls Support 866 918 1100 Monday through Friday 7 00 AM to 5 00 PM Central Standard Time Controls Support website www aaon com controlstechsupport NOTE Before calling Technical Support please have the model and serial number of the unit available PARTS For replacement parts please contact your local AAON Representative...

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