Loading ...
Loading ...
Loading ...
Part number 550-100-260/0520
125
ECO
®
Tec
GAS-FIRED WATER BOILER – 80/110/150/199 BOILER MANUAL
Troubleshooting (continued)
Troubleshooting suggestions —
Warnings
Display Condition Diagnostics Corrective Action(s)
Outdoor
Sensor
Error
Outdoor temperature sensor
short or OPEN.
Will automatically reset if the
condition clears.
Warning only. Max Target Temp is
targeted until Outdoor Temp
is restored, if used for target
adjustment.
Determine which sensors are suspect and measure their
resistance value and compare it to the values shown in
Figure101,page115. If the resistance values are incorrect
replace the temperature sensor. Refer to repair parts
section for proper part number.
Check wire harness for loose connections and pin
engagement at sensor connection, chassis mount
connection through control housing, and the control.
Unplug connection at sensor and at control and check
continuity between ends.
If problem persists after checking Items above, replace
control. Refer to repair parts section for kit number.
Exceeded
Flow
Rate
*Combi Only*
The Combi block has a ow
rate above the Maximum Flow
Rate for the boiler model.
Clears warning when the ow rate
is below the Maximum Flow Rate
for the boiler model minus 0.5
GPM.
Check the ow rate through the Combi block of the boiler
and reduce as necessary.
Check ow sensor for damages and voltage readings to
ensure a working ow sensor.
Target
Reduced - Flue
Flue temperature detected
between 200°F and 210°F.
Modies target temperature
to prevent overheating ue.
Clears warning when Flue
temperatures have been below
200°F and the target has returned
to its original setpoint, then 1 hour
of burner run time has elapsed
without the Flue temperature
exceeding 200°F.
Check the ue pipe for any blockages.
Check the CO2 readings using an analyzer and adjust gas
valve accordingly to match nominal CO2 readings within
manual.
Target
Reduced - Boiler
Boiler Outlet sensor detected
above Max Boiler Temp minus
Boiler Out On Di.
*Can only occur if using
System Supply or DHW Out as
a modulation sensor*
Clears warning when Boiler Outlet
sensor is detected below Max
Boiler Temp minus Boiler Out On
Di.
No corrective action required. Boiler is operating normally.
Target
Reduced - Flow
Boiler Outlet sensor detected
> Boiler Inlet sensor + 50°F.
Modies Target temperature
to prevent overstressing heat
exchanger.
Clears warning and target
modication when Boiler Outlet
sensor is detected ≤ Boiler Inlet
sensor + 50°F.
Check water ow through the boiler heat exchanger.
Check circulators for malfunction or wiring issues.
Clock Fault When the real time clock chip
is unable to be read.
When the real time clock chip is
working correctly and has had a
time written to it.
Enter an updated time/date.
+
If problems persist, replace display.
Software
Incompatible
Main control and display
software are not compatible.
Unit is updated to matching
software.
Check software versions for main control and display.
Replace the hardware that is the incorrect software
version.
Virtual
Input
Active
If Modbus is activating any
virtual TT input.
No virtual inputs are active. Check Modbus communication device for virtual TT input
commands.
Loading ...
Loading ...
Loading ...