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Trane CNT-SVX07C-EN, N512, Zone Controller - page 10

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Contents

iv CNT-SVX07C-EN

Chapter 7 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Contents

Main Page Page Page CNT-SVX07C-EN NOTICE: Contents Chapter 1 Overview and specifications . . . . . . . . . . . . . . . . . . 1 Chapter 2 General wiring information . . . . . . . . . . . . . . . . . . . 7 Chapter 3 Mounting the controller . . . . . . . . . . . . . . . . . . . . 11 Chapter 5 Sequence of operations . . . . . . . . . . . . . . . . . . . . 35 Page Page Chapter 1 Overview and specifications Product description Storage environment Dimensions Clearances Clearances Figure 1. Plastic-cover model dimensions and clearances Figure 2. Metal-cover model dimensions and clearances Agency listing/compliance Additional components Power transformer Water, duct, and outdoor-air temperature sensors Binary input switching devices Damper actuators Zone humidity sensor CO2 sensor Page Chapter 2 General wiring information Input/output terminal wiring AC-power wi ring WARNING HAZARDOUS VOLTAGE! CAUTION Communication-link wiring and addressing Page Chapter 3 Mounting the controller Location recommendations Operating environment requirements Mounting recommendations CAUTION Chapter 4 Input/output functions and wiring for typical applications Binary inputs BI1: Low-coil -temperature detecti on BI2: Condensate overflow BI3: Occupancy or generic binary input BI4: Fan status Analog inputs GND: Ground terminals ZN: Zone temperature SET: Local setpoint FAN: Fan mode input AI1: Entering wa ter temperature AI2: Discharge air temperature AI3: Outdoor air temperature or generic temperature AI4: Universal 420 mA Page Binary outputs Generic binary output Overriding binary outputs Wiring requirements and options CNT-SVX07C-EN 23 Figure 7. Two-pipe hydronic-cooling unit 24 CNT-SVX07C-EN Figure 8. Two-pipe hydronic-heating unit CNT-SVX07C-EN 25 Figure 9. Two-pipe hydronic heating/cooling unit with auto changeover 26 CNT-SVX07C-EN Figure 10. Four-pipe hydronic heating/cooling unit CNT-SVX07C-EN 27 Figure 11. Four-pipe heating/cooling unit with auto changeover 28 CNT-SVX07C-EN Figure 12. Two-pipe heating unit with DX cooling } CNT-SVX07C-EN 29 Figure 13. Electric heat unit with DX cooling } 30 CNT-SVX07C-EN Figure 14. Electric heat unit CNT-SVX07C-EN 31 Figure 15. Two-pipe heating unit with face-and-bypass damper 32 CNT-SVX07C-EN Figure 16. Two-pipe heating/cooling unit with face-and-bypass damper CNT-SVX07C-EN 33 Figure 17. Four-pipe heating/cooling unit with face-and-bypass damper Page Chapter 5 Sequence of operations Power-up sequence Random start Occupancy modes Occupied mode Unoccupied mode Occupied standby mode Timed override control Zone temperature control Cascade zone control Simplified zone control Discharge air tempering Morni ng warm-u p Morning cool-down Heating or cooling mode Entering wat er temperature samp ling function Fan operation Exhaust control Valve operation Modulating valve operation Modulating valve calibration Two-position valve operation Isolation-valve operation Modulating outdoor/return air dampers Chapter 5 Sequence of operations Table 10. Relationship between outdoor temperature sensors and damper position ASHRAE Cycle 1 conformance ASHRAE Cycle 2 conformance Economizing (free cooling) Two-position control of a modulating outdoor air damper Face-and-bypass damper operation Face-and-bypass, isolation-valve operation DX cooling operation Electric heat operation Baseboard heat operation Dehumidification Peer-to-peer communication Unit protection strategies Smart reset Low-coil-temperature protection Condensate overflow Fan status Fan off delay Filter-maintenance timer Freeze avoidance Freeze protection (discharge air temperature low limit) Chapter 6 Status indicators for operation and communication Test button Manual output test Manual output test Table 11. Manual output test sequence for non-face-and-bypass configurations Chapter 6 Status indicators for operation and communication Table 11. Manual output test sequence for non-face-and-bypass configurations Manual output test Service pin button Interpreting LEDs Page Diagnostics Types of diagnostics Smart reset diagnostics Informational diagnostics Table of diagnostics Chapter 6 Status indicators for operation and communication Table 16. Diagnostics (Continued) Diagnostics Table 16. Diagnostics (Continued) Page Chapter 7 Troubleshooting Chapter 7 Troubleshooting Table 18. Valves remain closed Table 17. Fan does not energize (Continued) Troubleshooting Table 19. Valves remain open Table 20. DX or electric heat does not energize Chapter 7 Troubleshooting Table 21. Outdoor air damper remains closed Table 22. Outdoor air damper remains open Table 20. DX or electric heat does not energize (Continued) Troubleshooting Table 22. Outdoor air damper remains open (Continued) Page Index Numerics A B C D E F G H M N O P R T U V W Z