Table of Contents
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Table of Contents
Troubleshooting
Related Manuals for AAON RSMD
Summary of Contents for AAON RSMD
- Page 1 RSMD Technical Guide...
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Page 2: Table Of Contents
8500 NW River Park Drive · Parkville, MO 64152 AAON Part Number: V87380 Toll Free Phone: 866-918-1100 AAON ® is a registered trademark of AAON, Inc., Tulsa, OK. PH: (816) 505-1100 · FAX: (816) 505-1101 · Neither WattMaster Controls, Inc. nor AAON assumes any ®... - Page 3 TABLE OF CONTENTS RSMD LCD SCREENS ........................12 RSMD Main Screens Map ............................. 13 RSMD Module Screens ............................13 System Status Screens ............................14 Sensor Status Screens ............................15 Setpoint Status Screens ............................16 Alarms Screen and Defi nitions ..........................17 Alarm History Screen .............................
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Page 4: Overview
• In Heating mode, the RSMD modulates and stages Up to 4 RSMD’s can be connected, depending on the size of the the compressors to maintain a given Supply Air system. There are 2 E-BUS Expansion Ports which allow the use of Temperature Setpoint. -
Page 5: Module Dimensions
EMERGENCY SHUTDOWN OR THE HH COMMUNICATIONS CONTROLLER WILL BE COMP DIS TEMP 1 TEMP DAMAGED SENSORS COMP DIS TEMP 2 LEAVING WATER TEMP WattMaster Overlay E-BUS DUAL E-BUS 000072 Rev1D R+ SHD T- EXPANSION Figure 1: RSMD Dimensions RSMD Technical Guide... -
Page 6: Installation & Wiring
The RSMD is connected to the VCC-X or VCCX2 Controller. The Suction Pressure Sensors are used to measure suction pressure Up to 4 RSMD’s can be connected, depending on the size of the at the HVAC unit’s DX evaporator coil suction line. This suction system. -
Page 7: Output Wiring
3 Y1 24VAC Belimo Actuator Wiring Size Transformer For Shown. Consult Factory Connect to Correct Total Load. For Other Manufacturer VCC-X or Line Voltage RSMD = 18 VA Wiring Instructions VCCX2 Controller Figure 3: RSMD Outputs Wiring RSMD Technical Guide... -
Page 8: Inputs & Outputs
Condenser 2 Fan Signal (0-10 VDC) or WSE Bypass Actuator (2-10 VDC) (AOUT2) Binary Outputs (24 VAC) Compressor 1 Enable Relay (RLY1) Compressor 2 Enable Relay (RLY2) Condenser 1 Enable Relay (RLY3) Condenser 1 Enable Relay (RLY4) Table 1: RSMD Inputs & Outputs RSMD Technical Guide... - Page 9 INPUTS & OUTPUTS RSMD Inputs & Outputs RSMD - Inputs & Outputs BIN3 - Outside Coil Temperature / Proof of Water Flow Status +5V VDC Power This input can be used for the following two options: This output is a 5 VDC output that supplies power to the Suction Air to Air Heat Pump Pressure Transducers.
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Page 10: Sequence Of Operations
To stage down compressors, if the digital compressor(s) have modulated down to 30% for the Stage Down Delay period and the If the RSMD has two Digital Compressors, the 1st Compressor will SAT has fallen below the SAT Cooling Setpoint minus the Stage be locked at 100% and the 2nd Compressor will modulate. -
Page 11: Head Pressure Control
The Refrigeration System Module for Digital Compressors (RSMD) can monitor a Head Pressure Transducer and control a Condenser Fan to maintain a Head Pressure Setpoint. The RSMD must be confi gured for an Air Cooled Condenser. A Condenser Relay is commanded on when the fi rst compressor is enabled (except if the unit is in Heat Pump Defrost Mode). -
Page 12: Rsmd Lcd Screens
DOWN Use this key to adjust setpoints and change confi gurations. ENTER Use the ENTER key to navigate through the Main Menu Screen categories. Figure 4: LCD Display and Navigation Keys Table 2: Navigation Key Functions RSMD Technical Guide... -
Page 13: Rsmd Main Screens Map
Main Screen Map & RSMD Module Screens RSMD Main Screens Map RSMD Module Screens Refer to the following map when navigating through the LCD Main Refer to the following map when navigating through the RSMD <MENU> <ENTER> Screens. To scroll through the screens, press the button. -
Page 14: System Status Screens
RSMD LCD SCREENS System Status Screens COMP A2-B2 ON/OFF COMP A1-B1 FIXED OR DIG COMPRESSOR A2, B2 (based on board address) ON, OFF, FORCE COMPRESSOR A1 or B1 - Fixed or Digital ON: Compressor is on. OFF: Compressor is off . -
Page 15: Sensor Status Screens
RSMD LCD SCREENS Sensor Status Screens IF CONFIGURED FOR WATER SOURCE HEAT PUMP H2O FLOW YES/NO CALC CT1 XX DEG WATER FLOW YES/NO CALCULATED COIL TEMPERATURE 1 FROM SUCTION PRESSURE 1 INPUT Sensor Status Screens Refer to the following map when navigating through the Sensor CALC CT2 Status Screens. -
Page 16: Setpoint Status Screens
RSMD LCD SCREENS Setpoint Status Screens Setpoint Status Screens IF CONFIGURED FOR WATER SOURCE HEAT PUMP, THE THREE SCREENS BELOW WILL DISPLAY Refer to the following map when navigating through the Setpoint Status Screens. From the SETPOINT STATUS Screen, press <ENTER>... -
Page 17: Alarms Screen And Defi Nitions
This alarm indicates that com- degrees F or more than 356 degrees F. This will cause an alarm and munication has been lost between the RSMD and the Main controller will shut down the compressor (relay). The system will retry after 5 or other E-BUS modules that may be connected. -
Page 18: Alarm History Screen
If the Emergency Shutdown binary in- put is not activated, the compressors will shut off . Refer to the following map when navigating through the LCD <ENTER> Protected Screens. From the RSMD Screen, press COMPRESSOR 1 FALSE ACTIVE INPUT: If the compressor relay <UP>... -
Page 19: Confi Guration Screens
RSMD LCD SCREENS Confi guration & Diagnostic Screens Confi guration Screens Refer to the following map when navigating through the <ENTER> Confi guration Screens. From the CONFIG Screen, press to scroll through the screens. EPROM: HOLD CONFIG DOWN COND FAN... - Page 20 RSMD LCD SCREENS Diagnostic Screens IF FORCE MODE IS ON, THE FOLLOWING SCREENS WILL APPEAR: BIN 1 - BIN 4 RLY 1-5 ON/OFF ON/OFF BINARY INPUTS #1 - #4 RELAYS 1 - 5 FORCE MODE Displays the current status of each Binary Input.
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Page 21: Alarm Count Screen
RSMD LCD SCREENS Alarm Counts & Address Screen ALARM COUNTS Screens Address Screen <ENTER> From the ALARM COUNTS Screen, press to scroll through the screens. Each screen will display the name of the alarm ADDRESS and how many times the alarm has occurred since you last cleared 1(152) the alarms. -
Page 22: Troubleshooting
OUTSIDE COIL TEMP / POWF OBSERVED EMERGENCY SHUTDOWN OR THE CONTROLLER WILL BE TEMP COMP DIS TEMP 1 DAMAGED SENSORS COMP DIS TEMP 2 LEAVING WATER TEMP WattMaster Overlay E-BUS 000072 Rev1C E-BUS Figure 5: RSMD LED Locations RSMD Technical Guide... -
Page 23: Oe275-01 Suction Pressure Transducer Testing For R410A
Suction Line of the Compressor. Use the voltage column to check the Suction Pressure Transducer while connected to the RSMD Module(s). The VCC-X/VCCX2 and the RSMD Module(s) must be powered for this test. Read voltage with 21.19 80.94 59.03... -
Page 24: Copeland ® Discharge Thermistor Temperature Sensor Testing
If the voltage is above 4.98 VDC, then the sensor or wiring is “open.” 17.91 3.20 If the voltage is less than 0.38 VDC, then the sensor or wiring is 15.07 3.00 shorted. 12.73 2.80 10.79 2.59 9.20 2.39 Table 4: Discharge Thermistor Temperature/ Resistance RSMD Technical Guide... -
Page 25: Leaving Water Temperature Sensor Testing
If the voltage is above 4.88 VDC, then the sensor or wiring is “open.” 22.22 11136 2.635 If the voltage is less than 0.05 VDC, then the sensor or wiring is 22.77 10878 2.605 shorted. Table 5: Temperature/Resistance for Type III 10K Ohm Thermistor Sensors RSMD Technical Guide... -
Page 26: Head Pressure Transducer Troubleshooting
If you suspect there is a problem related to the head pressure transducer, measurements can be taken at the HP1 and HP2 terminals. Reference Table 6, below. Head Pressure Transducer Chart Voltage Pressure Voltage Pressure Table 6: Head Pressure Transducer Chart RSMD Technical Guide... -
Page 27: Appendix: Condenser Configuration Options
TROUBLESHOOTING Notes RSMD Technical Guide... -
Page 28: Two Condenser Per Rsmd
Connects To VCC-X Loop Communications Connector When Used On A Split System. 24VAC Size Transformer For Connect to Correct Total Load. VCC-X Controller RSMD = 18 VA Line Voltage Figure 6: Default: Two Condenser RSMD Module Wiring RSMD Technical Guide... - Page 29 Condenser Options • D-BOX 26-40 Ton 2 Cond per RSMD USE < or > TO CHANGE • C-BOX 16-20 Ton Select the “2 Condensers for per RSMD” option on the above Hand • B-BOX Held Service Tool Screen. RSMD Technical Guide...
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Page 30: One Condenser Per Rsmd
Connects To VCC-X Loop Communications Connector When Used On A Split System. 24VAC Size Transformer For Connect to Correct Total Load. VCC-X Controller RSMD = 18 VA Line Voltage Figure 8: Single Condenser Per RSMD Module Wiring RSMD Technical Guide... - Page 31 1 Cond for 1 RSMD B-BOX Air to Air Heat Pump USE < or > TO CHANGE • B-BOX WSHP Select the “1 Condenser for 1 RSMD” option on the above Hand • C-BOX 25-30 Ton Held Service Tool Screen. •...
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Page 32: One Condenser Per 2 Rsmds
1 & 3 Match and 2 & 4 Match. Connector When Used On A Split System. 24VAC Size Transformer For Connect to Correct Total Load. VCC-X Controller RSMD = 18 VA Line Voltage Figure 10: Single Condenser Per 2 RSMD Modules Wiring RSMD Technical Guide... - Page 33 APPENDIX: CONDENSER OPTIONS Single Condenser Per Two Modules Figure 11: Prism 2 Condenser Confi guration RSMD Main Confi guration Screen #2 - HVAC Unit Application Condenser Options The One Condenser per Two RSMDs confi guration is used with the following HVAC units:...
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Page 34: One Condenser Per 3 Rsmds
Connects To VCC-X Loop Communications Connector When Used On A Split System. 24VAC Size Transformer For Connect to Correct Total Load. VCC-X Controller RSMD = 18 VA Line Voltage Figure 12: Single Condenser for 3 RSMD Modules Wiring RSMD Technical Guide... - Page 35 APPENDIX: CONDENSER OPTIONS Single Condenser For Three Modules Figure 13: Prism 2 Condenser Confi guration RSMD Main Confi guration Screen #2 - HVAC Unit Application Condenser Options The One Condenser per Three RSMDs confi guration is used with the following HVAC units:...
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Page 36: Two Condensers Per 2 Rsmds
R+ SHD T- EXPANSION Connects To VCC-X Loop Communications Connector When Used On A Split System. 24VAC Size Transformer For Connect to Correct Total Load. VCC-X Controller RSMD = 18 VA Line Voltage Figure 14: A1/ B1 Wiring RSMD Technical Guide... - Page 37 R+ SHD T- EXPANSION Connects To VCC-X Loop Communications Connector When Used On A Split System. 24VAC Size Transformer For Connect to Correct Total Load. VCC-X Controller RSMD = 18 VA Line Voltage Figure 15: A2 / B2 Wiring RSMD Technical Guide...
- Page 38 APPENDIX: CONDENSER OPTIONS Two Condensers Per Two Modules Figure 16: Prism 2 Condenser Confi guration HVAC Unit Application RSMD Main Confi guration Screen #2 - Condenser Options The Two Condensers per Two RSMDs confi guration is used with the following HVAC units:...
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Page 39: On/Off Condenser Options
Select this option to have the Condenser Fan turn On/Off with the Compressors. This can also be selected when No Head Pressure Control is required. Select this option if the Condenser Fan cycles On/Off based on the Fan Cycle Head Pressure Setpoints. RSMD Technical Guide... - Page 40 Ph: (918) 583-2266 • Fax: (918) 583-6094 AAON Part No.: V87380 ® WM Form: AA-RSMD-TGD-01D Printed in the USA • Copyright April 2018 • All Rights Reserved AAON/WattMaster Controls, Inc. • 8500 NW River Park Drive • Parkville, MO • 64152...