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8.4 Miscellaneous touchscreen controller errors
Miscellaneous errors
Issue
Diagnosis
Fix
“ Loop/Indoor Sensor”
“Insufficient Air Flow”
“Insufficient Water
Pressure”
The sensor plug is not
engaged.
Check the P501 plug is fully engaged
in the back of the controller board.
“Unknown Error”
The sensor plug is not
engaged.
Check the P501 plug is fully engaged
in the back of the controller board.
Temperature sensor input
problem.
Test each temperature sensor for
appropriate readings and Replace
defective temperature sensor.
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.
Current outlet temperature
exceeds operating limit.
Check water flow.
Defective or disconnected
temperature sensor.
Check wiring to temperature sensor
and control module.
Check temperature sensor.
Blank – screen dark, but fan
running Indicative of power-
surge damage to appliance
Check transformer; replace if
damaged.Check circuit board for
visible damage.
Controller is stuck in
"service" mode after
software update.
If update fails or no updates
applied.
Restarting returns the boiler to normal
operation.
114
Section: Troubleshooting
Содержание EX Series
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Страница 121: ...Appendices Wiring diagrams Figure 73 Controller electrical diagram 119 Appendices...
Страница 122: ...Figure 74 Internal wiring diagram EX 400 and EX 500 models 120 Section Appendices...
Страница 123: ...Figure 75 Internal wiring diagram EX 700 and EX 850 models 121 Wiring diagrams...
Страница 124: ...Figure 76 Sequence of Operation 122 Section Appendices...
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Страница 128: ...126 Boiler parts diagram EX 400 and EX 500...
Страница 132: ...130 Boiler parts diagram EX 700 and EX 850...