Lochinvar SNR200-100 用户手册

- No 120 VAC supplied to unit.   

•  Check external line switch, fuse, or breaker.

• Check wiring harness connection between display 
  board and main control board. Connect harness at both   
   points.

- Bad display board.  

•  Replace board.

- Bad main control board.  

•  Replace the main control board.

- Blown fuse. 

• Replace fuse F3 on the main control board, see 

 

 

 

 

  

  page 62 of this manual.

- Tank temperature set point satisfied.

•  Review temperature setting.

- Unit locked out on fault.  

•  Consult display for specific fault. Refer to fault 
  descriptions on page 66 of this manual for corrective 
 actions.

- Flue sensor open.  

•  Verify that the flue sensor is located in the flue outlet.

•  Check wiring connections at the flue sensor.

•  Check the resistance of the flue sensor and compare 
  to Table 12C on page 64 of this manual.

       

Installation & Service Manual

TM