Lochinvar 400 - 801 E

1 Service

16

Service Manual

1 Service

Parameter table

Table 1-4 (continued from previous page) This table lists SMART SYSTEM control module parameters and where

to access them

Menu Sub

Item Description See

Page

User Access Installer Access

Display Modify Display Modify

E

1DHW Boiler Set Point 21 No No Yes Yes

2DHW Tank Set Point 21 Yes Ye s Yes Yes

3Tank Set Point Differential 21 No No Ye s Yes

4Boiler Set Point Offset 21 No No Ye s Yes

5Boiler Set Point Differential 21 No No Ye s Yes

6SH/DHW Switching Time 21 No No Yes Yes

7DHW/SH Switching Time 21 No No Yes Yes

8Tank Minimum Set Point 21 No No Ye s Yes

9Tank Maximum Set Point 21 No No Ye s Yes

10 DHW Type (Normal, Zone) 21 No No Yes Yes

11 Fan Speed Limiting for Indirect DHW Tank 21 No No Yes Yes

F

1Low Outdoor Temperature 22 No No Ye s Yes

2High Outdoor Temperature 22 No No Ye s Yes

3SH1 Set Point at Low Outdoor Temp 22 No No Ye s Yes

4SH1 Set Point at High Outdoor Temp 22 No No Yes Yes

5Outdoor Air Shutdown SH1 22 No No Yes Yes

6Outdoor Air Shutdown Differential SH1 23 No No Yes Yes

7Shift Reset Curve SH1 23 No No Yes Yes

8SH2 Set Point at Low Outdoor Temp 22 No No Ye s Yes

9SH2 Set Point at High Outdoor Temp 22 No No Yes Yes

10 Outdoor Air Shutdown SH2 22 No No Yes Yes

11 Outdoor Air Shutdown Differential SH2 23 No No Yes Yes

12 Shift Reset Curve SH2 23 No No Yes Yes

13 SH3 Set Point at Low Outdoor Temp 22 No No Ye s Yes

14 SH3 Set Point at High Outdoor Temp 22 No No Yes Yes

15 Outdoor Air Shutdown SH3 22 No No Yes Yes

16 Outdoor Air Shutdown Differential SH3 23 No No Yes Yes

17 Shift Reset Curve SH3 23 No No Yes Yes

DHW SETTINGS

OUTDOOR RESET

Contents

Main Service Manual Models: 400 - 801 WARNING Hazard definitions Contents DANGER WARNING CAUTION CAUTION NOTICE Please read before proceeding Handling ceramic fiber materials REMOVAL OF COMBUSTION CHAMBER LINING NIOSH stated First Aid. Please read before proceeding When servicing boiler Boiler operation Boiler water Freeze protection fluids What is in this manual? Service Near boiler piping The Knight XL display Control module inputs Near boiler piping NAVIGATION DIAL The Knight XL display LOW VOLTAGE CONNECTION BOARD SMART CONTROL MODULE Control inputs LOW VOLTAGE CONNECTION BOARD SMART CONTROL MODULE Control outputs General Operation How the boiler operates How the control module operates Sequence of operation Access modes OPERATION DISPLAY Table 1-1 (continued from previous page) Sequence of Operation Display panel menu access Display panel parameter access Table 1-4 This table lists SMART SYSTEM control module parameters and where to access them A B C D TEMPERATURE SETTINGS DATA E OUTDOOR RESET F G CIRCULATION PUMPS I H J K Viewable and changeable control parameters A: General NOTICE C: Data Logging D: Functions B: Temperature Settings E: DHW Settings F: Outdoor Reset G: Anti-Cycling H: Control modes Cascade Offset Minimum On/Off Time J: BMS I: Circulation pumps K: Service Notification Maintenance and annual startup Service technician Owner maintenance 2 Address reported problems Check all piping for leaks Inspect boiler area Inspect boiler interior Flue vent system and air piping Check water system Check expansion tank Check boiler relief valve 2 Inspect ignition and flame sense electrodes Check ignition ground wiring Check all boiler wiring Check control settings Check flame signal Review with owner Cleaning boiler heat exchanger Before troubleshooting: Check the following: Check control module fuses Table 3-1 Troubleshooting Chart - No Display FAULT CAUSE CORRECTIVE ACTION No Display No Burner Operation Unit Does Not Modulate Above 50% Checking temperature sensors S1a S3a FAULT CAUSE CORRECTIVE ACTION Table 3-4 Troubleshooting Chart - Fault Messages Displayed on Boiler Interface Gas Pressure SW Flow Switch/LWCO Blocked Drain SW APS Open Anti-cycling Flame Fail Ign Flame Sequence Auto Reset High Limit Fan Low OR Fan Speed Low GV/Relay Fail Fan High OR Fan Speed High Sensor Open Sensor Shorted Louver Proving Sw Flue Temp High Delta T High Outlet Temp High Outlet Temp High (continued) Service Blk Rem Ctrl Flt Parameters Progr Page Combustion Analysis Procedure POSSIBLE CAUSE CORRECTIVE ACTION Gas valve adjustment procedure Model 501 Model 400 Models 601 - 801