7.3.6 Aux. Interlock 1 or 2
Aux. Interlock 1 or 2
Issue Diagnosis Fix
Interlock 1 or 2 terminals are
open.
Jumper lead is loose or
compromised.
Replace the jumper lead.
External safety is in an alarm state. Inspect the external safety
devices.
7.4 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.
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