Sterling 882.00294.00, DH1-610-2 - page 50

Alarm Message Cause Corrective Action Dryer Status

The process temperature

thermocouple is not connected

to the temperature controller.

Make sure the connections are

correct and tight.

PROCESS

SENSOR FAIL The process

temperature

thermocouple is

open.

The process temperature

thermocouple is damaged.

Replace the thermocouple.

- Dryer Shuts Down:

- Process blower OFF.

- Process heaters OFF.

- Regen heaters OFF.

- Alarm light is ON

- Alarm horn is ON.

The regeneration temperature

thermocouple is not connected

to the temperature controller.

Make sure the connections are

correct and tight.

REGEN

SENSOR FAIL The Regeneration

temperature

thermocouple is

open.

The regeneration temperature

thermocouple is damaged.

Replace the thermocouple.

- Dryer Shuts Down:

- Process blower OFF.

- Process heaters OFF.

- Regen heaters OFF.

- Alarm light is ON

- Alarm horn is ON.

Make sure the process filter is

clean. Clean or replace if

necessary.

Double check the alarm set

point. 35°F

Check the positioning of the

thermocouple inside the air

inlet of the drying hopper. The

tip of the thermocouple should

be centered to the tube, and

not touching any metal part of

the tube.

The drying temperature set

point is lower than dryer

capabilities. Check the dryer

specs.

Make sure all the hose

connections are tight.

PROCESS HIGH

TEMP

The process

temperature has

exceeded the alarm

set point.

Make sure the regeneration

timing cycle matches the

specs. If not contact Service

department.

- Dryer Shuts Down:

- Process blower OFF.

- Process heaters OFF.

- Regen heaters OFF.

- Alarm light is ON

- Alarm horn is ON

Portable Drying/Conveying Systems Chapter 6: Troubleshooting 50 of 63

Contents

Main SDAA 25-100 Small Dryer With AP-1 Controls Shipping Information Table of Contents CHAPTER 1: SAFETY ................................................................6 CHAPTER 2: FUNCTIONAL DESCRIPTION............................ 11 CHAPTER 3: INSTALLATION ..................................................15 CHAPTER 4: OPERATION .......................................................21 CHAPTER 5: MAINTENANCE.................................................. 40 CHAPTER 6: TROUBLESHOOTING........................................ 48 CHAPTER 7: APPENDIX ..........................................................55 Chapter 1: Safety 1-1 How to Use This Manual DANGER! 1-2 Safety Tag Information 1-3 Warnings and Precautions 1-4 Responsibility Page Page Chapter 2: Functional Description 2-1 Models Covered in This Manual 2-2 General Description 2-3 Standard Features 2-4 Options 2-5 Safety Devices and Interlocks Page Chapter 3: Installation 3-1 Uncrating the Equipment 3-2 Rigging and Placing the Dryer Note: Floor Mounted Dryers can be lifted by hoist or fork lift. USE FORK LIFT TRUCK USE Overhead Crane 3-3 Electrical Connections 3-4 Setup Procedures Checking for Proper Blower Rotation Drying Hopper Air Trap Considerations (If Equipped) Installing the Optional Aftercooler 3-5 Initial Start-up Pre-Startup Checks Starting Up the Dryer The process blower starts. Auto-Tuning the Dryer (Requires Supervisory Password) Page Chapter 4: Operation 4-1 Controller Description and Operation Page Page Page Page Page Page Page Page Page Page Page Page Page Page Restoring the WATLOW Redundant Safety Controller to Factory Setup Entering Operating Parameters to Select Modes Figure 6: Setting List for Redundant Safety Controller (WATLOW), Part No. A0568961 4-2 System Operation Procedures process. regeneration. beginning. 4-3 Shutting Down the Dryer Chapter 5: Maintenance 5-1 Preventative Maintenance Schedule Portable Drying/Conveying Systems Chapter 5: Maintenance 40 of 63 replacement date inspection 5-2 Preventative Maintenance Servicing Process Air Filters Recommendations for Cleaning and Replacing Filters Figure7: Air Filter Location and Disassembly Vacuuming Cleaning with Compressed Air Servicing the Dew Point Monitor 5-3 Corrective Maintenance Symptoms of Worn Desiccant + FIRST AID + In case of eye contact, immediately flush eyes with plenty of water for at least 15 minutes. SEE A PHYSICIAN IMMEDIATELY IF IRRITATION PERSISTS. Replacing Worn Desiccant Figure 8: Desiccant Bed Location and Disassembly Figure 9: Required Desiccant Amounts Replacing the regeneration heaters Procedures (see figure 8). Replacing the Process Heater Figure 10: Process Heater Location and Disassembly Procedures Replacing/Cleaning the Cooling Coils Figure 11: Cooling Coil Location and Disassembly Page Chapter 6: Troubleshooting 6-1 Introduction Page Page Page Page Page 6-2 Determining Temperature Controller Errors or Sensor Errors Using a Thermocouple Chapter 7: Appendix 7-1 Warranty Warranty Specifications Warranty Restrictions Warranty Liabilities 7-2 Optional Components 7-3 Technical Specifications Annex B Information Aftercooler Design Specifications Portable Drying/Conveying Systems Chapter 7: Appendix 57 of 63 7-4 Drawings and Diagrams Figure 12: Standard Model (180F to 250F) Air Flow Schematic Page Figure 14: Low Heat Model (120F to 250F) Air Flow Schematic 7-5 Spare Parts List Figure 15: Level 1 Spare Parts List (Electrical & Mechanical) Portable Drying/Conveying Systems Chapter 7: Appendix 60 of 63 Page 7-6 Returned Material Policy 7-7 Dryer Identification (Serial Number) Tag 7-8 Technical Assistance Portable Drying/Conveying Systems Chapter 7: Appendix 63 of 63 Parts Department Service Department Sales Department