5.
If the error persists, perform a LWCO test. Go to > SIM Menu> Hi-Limit Test > Run
the test to check if the low water cutoff sensor is opening.
8.1.5.3 Resetting a boiler after a hi-limit temperature lockout
A boiler in a lockout condition due to a hi-limit temperature error will need to be reset.
1.
Go to > Clear Errors > Yes.
2. Check that there is no air trapped in the system and that the boiler is pressurized.
3.
To reset the SIM Module, go to > SIM Menu> Hi-Limit Test > Reset > Yes.
4. Run the boiler to ensure that the error has been cleared.
5.
If the error persists, perform a hi-limit test. Go to > SIM Menu> Hi-Limit Test > Run
the test to see if the hi-limit switch is operational. You can also perform this test for gasket
blowouts.
8.2 Troubleshooting error messages
Warning
Never attempt to repair the control module (circuit board). If the control module is
defective, replace it immediately.
Errors shown on the touchscreen controller are described below as well as diagnoses and fixes.
The bottom line of the touchscreen displays the boiler's error status. The following colors represent
the boiler's operating status:
Green – Normal
Yellow – Warning
Red – Alarm
The text inside the bar will indicate the specific warning or alarm. If there is more than one alarm
present the text will scroll slowly through all current alarm conditions. Besides the errors listed below,
see also Miscellaneous touchscreen controller errors on page 109.
8.2 Troubleshooting error messages
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