LAARS NeoTherm NTV (Sizes 150–285 MBTU/h) - Service Manual User Manual
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Table of contents
Document Outline
- How to Use This Manual
- Safety Notes
- Table of Contents
- A1 - Troubleshooting - Start Here
- A2 - Unit Will Not Fire - Blower is Not Running
- A3 - Blower Runs Continuously, No Display
- A4 - Control Unit is in “Standby” Mode
- A5 - Changing Control Settings, Change Not CompleteOriginal (White) Interface
- A6 - Unit is Running, But Building is Still Cold
- A7 - Control Unit Says “Run,” But Boiler is Not Firing
- A8 - Open Safety Interlock Chain - Fault #63
- A9 - Short-Cycling - Fault #61
- A10 - Unit is Noisy
- B1 - Quick Check of Components in the Safety Interlock Chain
- B2 - Troubleshooting the 24V AC Power Supply
- B3 - Checking the Safety Interlocks
- B4 - Checking the Low Water Cutoff Switch (option)
- B5 - Controller for Low Water Cutoff
- B6 - Removing and Replacing the Low Water Cutoff Switch
- B7 - High Water Temperature Limit Switch
- B8 - Checking the Flow Switch
- B9 - Testing the Flow Switch
- B10 - Removing and Replacing the Flow Switch
- B11 - Removing and Replacing the Gas Valve
- B12 - Checking the Condensate Trap Level Switch
- B13 - Testing the Condensate Trap Level Switch
- B14 - Removing and Replacing the Condensate Trap
- B15 - Checking the Air Pressure Switch
- B16 - Test Procedure for Air Pressure Switch
- B17 - Removing and Replacing the Air Pressure Switch
- B18 - Checking the Blower
- B19 - Removing and Replacing the Blower
- B20 - High Stack Temperature Fault
- B21 - Removing and Replacing the Stack Temperature Limit Switch
- B22 - Checking the System Sensor
- B23 - Checking the DHW Sensor
- B24 - Inlet Water Temperature Sensor
- B25 - Removing and Replacing the Inlet Water Temperature Sensor
- B26 - Outlet Water Temperature Sensor
- B27 - Removing and Replacing the Outlet Water Temperature Sensor
- B28 - Testing the Temperature Sensors
- B29 - Troubleshooting the Outdoor Reset System
- B30 - Servicing the Transformer
- B31 - Removing and Replacing the Pressure Relief Valve
- B32 - Ignitor Assembly
- B33 - Flame Sensor
- B34 - Pump Fault
- C1 - Possible Combustion Problems
- C2 - Combustion Adjustment Procedure - Units with Original (White) User Interface
- C3 - Combustion Adjustment Procedure - Units with Current User Interface
- C4 - Troubleshooting Combustion Problems
- C5 - Cleaning the Burner and Heat Exchanger
- D1 - Identifying the User Interface on Your Unit
- D2 - Using the Original (White) User Interface
- D3 - Reacting to Lockouts on the Original (White) User Interface
- D4 - Removing and Replacing the Original (White) User Interface
- D5 - Using the Current User Interface
- D6 - Reacting to Lockouts on the Current User Interface
- D7 - Removing and Replacing the Current User Interface
- D8 - When to Replace a SOLA Controller
- D9 - Removing and Replacing the SOLA Controller
- Appendix 1 - Error Codes
- Appendix 2 - Ignition and Firing Sequence
- Appendix 3 - Wiring Diagram