Procedure Of Troubleshooting; Main Detection Points - Tadiran Telecom SMVH09A-2A1B1NA Service Manual

9.3 Procedure of Troubleshooting

Indoor unit
(1) Malfunction of Temperature Sensor U0, U1

Main detection points:

● Is the wiring terminal between the temperature sensor and the controller loosened or poorly contacted?
● Is there short circuit due to trip-over of the parts?
● Is the temperature sensor broken?
● Is mainboard broken?Malfunction diagnosis process:
temperature sensor and the controller
Start
Is the wiring terminal between the
loosened or poorly contacted?
No
Is there short circuit due to trip-
over of the parts
No
Is the temperature sensor normal
according to the resistance table?
Yes
No
Replace the mainboard with
the same model.
End
Yes
Insert the temperature
sensor tightly
No Is malfunction
eliminated
Yes
Make the parts upright
No Is malfunction
eliminated
No
Replace it with a
temperature sensor with
the same model
Is malfunction
eliminated
Yes
Troubleshooting
Yes
Yes
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