Miscellaneous Touchscreen Controller Errors - IBC EX Series Installation & Operating Manual

8.4 Miscellaneous touchscreen controller errors

Issue
" Loop/Indoor Sensor"
"Insufficient Air Flow"
"Insufficient Water
Pressure"
"Unknown Error"
Error - Max. Inlet/Outlet
Sensor Temp. Exceeded. ->
Check water flow Water
temperature signal not
within acceptable range.
Potential flow or sensor
failure. Consult service
technician.
Blank – screen dark, but fan
running Indicative of power-
surge damage to appliance
Controller is stuck in
"service" mode after
software update.
Miscellaneous errors
Diagnosis
The sensor plug is not
engaged.
The sensor plug is not
engaged.
Temperature sensor input
problem.
Current outlet temperature
exceeds operating limit.
Defective or disconnected
temperature sensor.
If update fails or no updates
applied.
114
Section: Troubleshooting
Fix
Check the P501 plug is fully engaged
in the back of the controller board.
Check the P501 plug is fully engaged
in the back of the controller board.
Test each temperature sensor for
appropriate readings and Replace
defective temperature sensor.
Check water flow.
Check wiring to temperature sensor
and control module.
Check temperature sensor.
Check transformer; replace if
damaged.Check circuit board for
visible damage.
Restarting returns the boiler to normal
operation.