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TFTN 085-199
18.0 TROUBLESHOOTING
Observe the following precautions when servicing the boiler. Failure to comply with these may
result in fire, property damage, serious injury or death.
Before Servicing the Boiler
•
Disconnect or shutoff all energy sources to the boiler: 120VAC power, water, and gas.
•
Identify and mark wires before disconnecting or removing them.
•
Never bypass electrical fuses or limit devices except temporarily for testing.
•
Use proper personal protective equipment (PPE) i.e., eye protection, safety footwear.
Diagnostic Procedures
These procedures should only be performed by qualified service personnel when abnormal operation of the boiler is
suspected. The boiler incorporates a sophisticated microprocessor-based control which normally responds appropriately to
varying conditions. If the boiler operation appears to be incorrect, follow these procedures to identify, and correct, the
source of the problem.
1.
Blocking Error – read the error code displayed on the Home Screen and follow the suggestions listed in Table 18-1. If
an error is not displayed on the Home Screen check for errors listed on the Active Errors screen of the
there are no errors listed on the Active Errors screen, then proceed to the next step.
NOTE: for errors that require a manual reset, a "Press RESET" button will be located beneath the error description –
press to clear the lockout; see Figure 18-1. Alternatively, errors requiring manual reset can by cleared from the
Active Errors screen by selecting "Press to reset active errors"; see section
NOTE: errors that are auto reset will clear automatically when the error condition is resolved; for these errors, the
"Press RESET" button will not appear.
2.
Boiler Temperature in Range – the burner will only turn on if the boiler outlet temperature (or system temperature –
if using a system sensor) is below the ON temperature threshold of the heat demand being serviced. Compare the ON
temperature to the outlet (or system) temperature, if the ON temperature is lower, then the burner will not fire; see
Figure 18-2.
NOTE: if the Outlet Temp is lower than the ON temperature, check the System Temp reading from the Boiler Details
page. If a System Sensor is used, its reading must be lower than the ON temperature before the burner will turn
on.
NOTE: if the Outlet (or System) Temp is lower than the ON temperature, and the Home Screen is still indicating "Boiler
temperature in range", then it is possible that the CH Anti-cycle Time counter has not elapsed; see
General Advanced Settings.
Figure 18-1 Clearing Lockouts Requiring Manual Reset
Installation and Operation Manual
Errors
16.7 –
Errors.
Error Code – see Table 18-1
Press RESET – press to clear the lockout.
Note, the button will not appear if the
error type is auto reset.
Errors – check the Active Errors menu
for blocking errors that may not have
appeared on the Home Screen. Select
"Press to reset active errors" to clear
any errors requiring manual reset
CH Setup
menu. If
->
105
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