64
Table 10.3: Warning Errors
TROUBLESHOOTING
Error
Number
Error Display
Corrective Actions
200
CC_LOSS_COMMUNICATION
Cascade System:
Managing cascade control lost communication with one of the depending controls.
– Check if expected number of dependent boilers are all powered on and wired to managing
boiler.
– Check for broken wires or bad connections on terminals #24 & #25 if dependent boilers or
#26 & #27 if managing boiler.
– If error persists, reference proper connection and set up in Section 8 of this manual.
202
APP_SELECTION_ERROR
Unknown appliance model is selected.
Verify correct appliance model selection using Table 8.5.2.1 in this manual.
204
OUTDOOR_WRONG
Outdoor sensor is either open or shorted.
Remove the wires from terminals #30  on the boiler and check the resistance between
them.
– If this reading is below 3000
Ω
check the reading at the sensor.
– If the reading is the same at the sensor, replace the sensor.
– If this reading is higher at the sensor, replace the wiring.
205
T_SYSTEM_WRONG
System sensor is either open or shorted.
Remove the wires from terminals #28  on the boiler and check the resistance between
them.
– If this reading is below 3000
Ω
check the reading at the sensor.
– If the reading is the same at the sensor, replace the sensor.
– If this reading is higher at the sensor, replace the wiring.
Note: Outdoor reset will not function with this error present.
