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Danfoss TTS350 - User Manual

Danfoss TTS350
294 pages
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®
Service Manual - Revision H
Danfoss Turbocor® Twin-Turbine
Centrifugal Series Compressors
TT Series Compressors
http://turbocor.danfoss.com |

Table of Contents

Other manuals for Danfoss TTS350

Preview: Applications And Installation Manual
Applications And Installation Manual114 pages

Questions and Answers

  • D
    Danielle RobinsonAug 15, 2025
    What to do if there is a High Discharge Temperature Fault in my Danfoss TTS350?
    • D
      daviestheresaAug 15, 2025
      A high discharge temperature fault in the Danfoss Air Compressor often suggests insufficient charge (low gas), increased condenser temperature, a check valve that hasn't opened, or the compressor running in surge condition for too long. To address this, check the chiller gas charge, the conditions of the air/water entering the condenser, and the operational settings. Also, make sure the discharge pressure/temperature sensor is working correctly and that the check valve opens during compressor operation.
  • V
    Vanessa WestAug 18, 2025
    What to do if there is a Low Suction Pressure Fault in my Danfoss TTS350?
    • L
      Laura SotoAug 18, 2025
      A Low Suction Pressure Fault in your Danfoss Air Compressor suggests there may be insufficient charge, insufficient system load, or a sudden drop in evaporator entering air/water temperature or flow. You should check the charge, system load, and entering air/water conditions to resolve this issue.
  • J
    John JohnsonAug 21, 2025
    What to do if I see a High Inverter Temperature Fault on my Danfoss Air Compressor?
    • A
      Amy WebbAug 21, 2025
      A High Inverter Temperature Fault in your Danfoss Air Compressor indicates that the inverter cooling is not sufficient. Ensure that the liquid motor-cooling line has enough liquid supply and is not blocked. To prevent Inverter failure, avoid running the compressor for long periods at a pressure ratio less than 1.5. If the fault occurs three times in 30 minutes, a Lock-Out Fault will occur. In this case, allow the measured Inverter temperature to drop below the Maximum Drive Startup Temperature before attempting a restart.
  • E
    eharrisAug 25, 2025
    What causes a High Discharge Pressure Fault in a Danfoss TTS350?
    • D
      Debra CortezAug 25, 2025
      A High Discharge Pressure Fault in your Danfoss Air Compressor suggests that the condenser may be faulty or there's insufficient air/water flow. You should check the condenser and air/water flow. Also review the fault log for the actual discharge pressure and other conditions recorded at the time of the fault.
  • K
    Karen BakerAug 27, 2025
    What causes a 3-Phase Over-Current Fault in a Danfoss TTS350 Air Compressor?
    • H
      Heather GarciaAug 27, 2025
      A 3-Phase Over-Current Fault in your Danfoss Air Compressor means the compressor is drawing more current than the 3-Phase Current Fault Limit. Review the fault log for the recorded 3-Phase Current level, demand, entering air/water temperature (if available), and other conditions recorded at the time of the fault. This fault can also be related to a start speed or minimum pressure ratio that is set too high at start-up, a power control integral gain that is too high, or a sudden increase in load/demand or system changes.
  • M
    Marilyn AvilaAug 30, 2025
    What causes a High Cavity Temperature Fault in my Danfoss TTS350 Air Compressor?
    • J
      Jennifer ColeAug 30, 2025
      A High Cavity Temperature Fault in your Danfoss Air Compressor indicates that the motor cooling is insufficient. Ensure the liquid motor-cooling line has sufficient liquid supply and is not blocked. To prevent shaft demagnetization or Back EMF is low faults, avoid running the compressor for long periods at a pressure ratio less than 1.5.
  • E
    Ethan WrightSep 2, 2025
    What causes a High Pressure Ratio Fault in my Danfoss TTS350?
    • M
      Mr. Robert LewisSep 2, 2025
      A High Pressure Ratio Fault in your Danfoss Air Compressor suggests the condenser pressure is high, there is not enough load on the evaporator, or there is insufficient water/air flow in either the condenser or evaporator. Check the electronic expansion valve (EXV) operation, condenser and evaporator loads, and water/air flow.
  • J
    Jeremy FarrellSep 5, 2025
    What does a Low Leaving Fluid Temperature Fault mean on my Danfoss TTS350?
    • M
      Ms. Connie Munoz MDSep 5, 2025
      A Low Leaving Fluid Temperature Fault in your Danfoss Air Compressor suggests there is insufficient evaporator fluid flow or insufficient system load. Check the evaporator fluid flow and system load. Also, verify the leaving fluid temperature sensor.
  • P
    Patricia WilliamsSep 8, 2025
    What causes a High SCR Temperature Fault in my Danfoss TTS350?
    • J
      Julie GreeneSep 8, 2025
      A High SCR Temperature Fault in your Danfoss Air Compressor indicates that the SCR cooling is insufficient. Ensure the liquid motor-cooling line has sufficient liquid supply and is not blocked.
  • S
    Steven RobertsSep 12, 2025
    What does a Sensor Fault mean on my Danfoss TTS350?
    • C
      caitlin42Sep 12, 2025
      A Sensor Fault in your Danfoss Air Compressor may be caused by values out of the specified ranges. Review the fault log for any such indications recorded at the time of the fault. Verify the questionable sensor and related connections to check for failure. Also, verify the suction pressure/temperature sensor.

Summary

Chapter 1.0 Introduction

1.5 Safety Summary

Highlights safety precautions for installation, start-up, and service of compressors.

1.8 Electrical Isolation

Provides step-by-step instructions for safely isolating compressor power before servicing.

1.9 Handling Static Sensitive Devices

1.10 DC Bus Test Harness Installation and Removal

Details the procedure for installing and removing the DC bus test harness for voltage testing.

Chapter 2.0 Compressor Fundamentals

Chapter 3.0 Compressor Removal and Installation

3.1 Refrigerant Containment

Provides procedures for isolating and recovering refrigerant before removal.

3.2 Compressor Removal

Step-by-step guide for safely removing the compressor from the system.

3.3 Compressor Installation

Detailed instructions for installing a new compressor, including torque specifications.

Chapter 4.0 Component Identification

4.13 Terminal Block Fuse Replacement

4.14 Soft Start

Details the two variants of soft starts and their verification, removal, and installation.

4.18 Silicone-Controlled Rectifier

4.22 Inverter

Details inverter connections, verification, cable harness, and removal/installation.

4.23 Motor Components

4.24 High Voltage DC-DC Converter

Explains the DC-DC converter function, verification, and removal/installation.

4.25 Backplane

4.26 Serial Driver

4.27 BMCC

4.28 Bearing Pulse Width Modulator Amplifier

Explains the PWM amplifier function, connections, and verification methods.

4.29 Magnetic Bearings

Covers magnetic bearing function, connections, verification, and power feedthroughs.

4.30 Bearing Sensors

Chapter 5.0 Troubleshooting

5.1 Alarm and Fault Indications

Covers alarm types, fault types, and troubleshooting based on indications.

5.2 Troubleshooting with the Service Monitoring Tools Software

Guides on using SMT software for compressor fault analysis and troubleshooting.

5.3 Bearing Calibration

Details when to calibrate bearings and the procedure for performing calibration.

5.5 System and Compressor Level Troubleshooting

Addresses troubleshooting at system and compressor levels, including voltage issues.

Chapter 6.0 Maintenance

6.1 Preventative Maintenance Tasks

Danfoss TTS350 Specifications

General IconGeneral
BrandDanfoss
ModelTTS350
CategoryAir Compressor
LanguageEnglish

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