SIM+ Status Indicators
LED 1 LED 2 State Description, LED status indication
On On Heating
LED 1 On = Flame detected
LED 2 = Burner-on call state
Rapid flash On Igniting
LED 1 Flashing - Electrode sparking
LED 2 = Burner-on call state
Off Flashing Lockout
Possible errors:
An operating limit was
exceeded
A sequence failed
An external sensor fault was
detected.
Flash alternately
with LED 2
Flash alternately
with LED 1
Fail-safe An error was detected - the boiler
requires a power cycle
Table 13 SIM+ LED status Indicators
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 95.
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