3 Troubleshooting (continued)
Table 3E Troubleshooting Chart - Fault Messages Displayed on Operator Interface
FAULT | DESCRIPTION | CORRECTIVE ACTION | |
|
|
| |
| - Either the optional manual reset low gas | • Reset the pressure switches. | |
| pressure switch or the optional manual reset |
| |
| high gas pressure switch tripped. | • Measure the supply gas pressure to determine | |
Gas Pressure SW |
| cause of failure. Refer to the Gas Connections | |
- Models 992 - 2072 (natural gas) - Automatic | Section of the Installation and Operation Manual for | ||
(Will require a manual | Reset Low Gas is open. | detailed information concerning the gas supply. | |
reset once the condition | |||
|
| ||
has been corrected.) |
| • Correct the supply gas pressure if necessary. | |
|
|
Flow Switch/ | Either the flow switch or the optional low | • Check pump operation on a call for heat. |
water cutoff is not making. |
| |
LWCO |
| • Check for closed valves or obstructions in the |
(Lockout will reset |
| water piping. |
automatically after |
|
|
5 minutes or may be |
| • Verify system is full of water and all air has been |
reset immediately once |
| purged from the system. |
condition has been |
|
|
corrected. Press the |
|
|
RESET button on the |
|
|
SMART SYSTEM display |
|
|
to reset.) |
|
|
|
|
|
Flame Sequence | The flame detector circuit is seeing a flame | • Check supply voltage for proper polarity. |
signal while the gas valve is |
| |
(Will require a manual |
| • Check that the gas valve is closed. |
reset once the condition |
|
|
has been corrected. Press |
| • Check external wiring for voltage feedback. |
the RESET button on the |
|
|
SMART SYSTEM display |
| • Check the internal wiring for bad connections. |
to reset.) |
|
|
|
| • Replace main control board. |
|
|
|
| The main control board has received a call | • The control board will release the call for heat after |
| for heat too quickly after the previous call for | a set time period. |
| heat has ended. | • The control board will release the call for heat if the |
| ||
|
| |
|
| outlet temperature drops too quickly. |
37