8.0 Troubleshooting
Often, you can identify a problem and solve it through basic checks: confirming the electrical power
supply, gas flow and resetting the thermostat control. For troubleshooting, we recommend that you use
the three-step approach illustrated below.
Note
The boilers are equipped with a blocked vent shutoff system, which closes the gas supply
upon detection of an irregular venting condition. In such an event, the electronic controller
automatically carries out a reset/ retry every 5 minutes.
The troubleshooting section is divided into 3 sections:
Preliminary checks
Electronic components
Troubleshooting error messages
Often, a problem can be identified and solved through simple checks of the basics: confirming the
electrical power supply, gas flow and resetting the thermostat control.
8.1 Preliminary checks
The first step in troubleshooting this system should be a review of the touchscreen controller. There are
a number of diagnostic features incorporated in the software that evaluate system integrity, display
error conditions and provide initial remedial actions.
In addition to checking the display, the following list is a guideline for troubleshooting:
Preliminary Troubleshooting Checks Check
Confirm power to the boiler: check that the touchscreen controller display is on (e.g.,
display is lit. The touchscreen controller’s display will be fully functional in 90 seconds
after power is restored to the boiler.)
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Check that the boiler is not in a safety lockout.
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Ensure wiring is clean and secure.
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Check that gas is reaching the appliance.
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Check the gas pressure switches.
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Confirm that the water system is properly charged within specifications, and that the pump
is serviceable.
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