Service Manual
3Troubleshooting
Table 3F Troubleshooting Chart - Fault Messages Displayed on Boiler Interface
FAULT | DESCRIPTION | CORRECTIVE ACTION | |
|
|
| |
| Either the optional flow switch or the optional | • Check boiler pump operation on a call for heat. | |
| low water cutoff is not making. |
| |
Flow |
| • Check for closed valves or obstructions in the boiler | |
| piping. | ||
Switch/LWCO |
| ||
|
| ||
(will require a manual |
| • Verify system is full of water and all air has been | |
reset once condition has |
| purged from the system. | |
been corrected. Press |
| • Check for loose or misplaced jumpers if flow switch or | |
the RESET button on |
| ||
| LWCO is not installed. | ||
the SMART SYSTEM |
| ||
|
| ||
display to reset.) |
|
| |
Blown fuse. | • Replace fuse F2 on the control board, see page 28 of | ||
| |||
|
| this manual. | |
|
|
| |
| The blocked drain switch has detected | • Check condensate tube from unit to floor drain for | |
Blocked Drain SW | excessive condensate build up inside the | proper installation and obstructions. | |
(will require a manual | unit. | • Inspect condensate trap for blockage. Clean if | |
reset once condition has |
| ||
| necessary. | ||
been corrected. Press |
| ||
|
| ||
the RESET button on |
| • Check for loose wiring connection at wire harness | |
the SMART SYSTEM |
| plug. | |
display to reset.) |
| • Bad blocked drain switch. Replace switch. | |
|
| ||
|
|
| |
Flame | The flame detector circuit is seeing a flame | • Check supply voltage for proper polarity. | |
Sequence | signal while no flame is present. |
| |
| • Check external wiring for voltage feedback. | ||
(will require a manual |
| ||
|
| ||
reset once the condition |
| • Check the flame rod and make sure it is clean. | |
has been corrected. |
| • Check the internal wiring for bad connections. | |
Press the RESET button |
| ||
on the SMART SYSTEM |
| • Replace main control board. | |
display to reset.) |
| ||
|
| ||
|
|
| |
GV/Relay | The main control board did not detect the gas | • Check wiring harness connection at the gas valve and | |
Fail | valve. | at the main control board. | |
| |||
|
| ||
(will require a manual |
| • Replace the gas valve wire harness. | |
reset once the condition |
| ||
|
| ||
has been corrected. |
| • Replace the gas valve. | |
Press the RESET button |
| ||
|
| ||
on the SMART SYSTEM |
| • Replace the main control board. | |
display to reset.) |
| ||
|
| ||
|
|
|
32
