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[giath]

HI
I have unite SBIII SR + and it has code 80 ( Compressores temp sensor ) i change the sensor and clear code which does not clear.....
How can I clear that code from display
please any help i will be thank

[sonkax]

maybe harness fault, not sensor

[Robert Hilton]

Have you tried to clear the code in Guarded Access?

[gravy258]

your reffering to a SBIII SR + magnum ?

run new wires from the micro plug to the sensor

[giath]

Have you tried to clear the code in Guarded Access?
I have not tired, because i don not know how!

[giath]

I have no tired , because i do not know how! could you please to lead me

[giath]

Have you tried to clear the code in Guarded Access?
no, but how can i tried?

[Robert Hilton]

Unit on,not running in continuous mode.
Press TK and Clear buttons and hold until display shows HM hourmeter.
Scroll through to DDUR, press TK/Clear and hold until CRA.
Press Code and then clear.
I'm not sure it will clear but it's worth a try, at least you'll know then that it is a hard fault.

[giath]

thank you very much i will try and tell you
Unit on,not running in continuous mode.
Press TK and Clear buttons and hold until display shows HM hourmeter.
Scroll through to DDUR, press TK/Clear and hold until CRA.
Press Code and then clear.
I'm not sure it will clear but it's worth a try, at least you'll know then that it is a hard fault.

[DaButcher]

Does the sensor appear to be reading correctly?

[giath]

maybe harness fault, not sensorsorry, which harneess

[giath]

Does the sensor appear to be reading correctly? of course appear, where is problem?

[DaButcher]

Clean the bottom right connection on back of micro with electronic cleaner and reapply dielectric grease, if that does not help we'll diagnose further.

[giath]

Clean the bottom right connection on back of micro with electronic cleaner and reapply dielectric grease, if that does not help we'll diagnose further.Hi
thanks , i tried by cleaner the micro ...... but nothing happen

[DaButcher]

I do remember making repair on a SB400 for same complaint. Someone had plugged the temp. sensor into the wrong connection (it will fit into either the high or low pressure cut out, forget which one). Double check that yours is wired correctly.

[DaButcher]

And straight from the book.

A defective sensor will usually display as [----]. The sensor or it’s
associated circuit may be open, shorted internally or shorted to
chassis ground. A direct short to chassis ground on a single sensor
may cause multiple sensor codes to appear.
1. Disconnected the sensor and temporarily connect a new sensor.
Display the sensor on the microprocessor display. If the
temperature can now be displayed the original sensor was
defective.
2. If the temperature is not displayed by the microprocessor unplug the
sensor and check for +5 vdc between CSTP and CSTN. If 5 volts is
not present check the microprocessor using Service Procedure
A01A.
3. If the microprocessor passes the test, disconnect the sensor
harness from the microprocessor and disconnect the suspected bad
sensor. Using a Fluke meter set for ohms check for shorts to
chassis ground on both the CSTP and CSTN wires of the suspect
sensor. If a short exists examine the wiring harness for chaffed
areas and repair as required.
4. If no shorts exist connect a jumper across the sensor connector.
Check continuity from CSTP to CSTN at the microprocessor
connector. The circuit resistance should be less than 1 ohm. If not,
check the harness and all associated connectors using the wiring
diagram for the unit.
5. If an intermittent problem exists monitor the voltage between CSTP
and CSTN at the sensor plug with the sensor connected. The
voltage should be approximately 2-4 vdc. If the voltage suddenly
increases the sensor is intermittently open. If the voltage suddenly
decreases look for an intermittent short or open in the wiring
between the microprocessor and the sensor.

[gravy258]

Giath,
just solder in new two core wire from the micro to the sensor, leaving the old wires disconnected/cut. (i.e don't just tap into the old wires, cut em off)

[giath]

Thank you Sir for your avaluable info. Anyway i have changed the monitor an the code 80 doesnot appear ( it went with wind )But Sir , Can you prvide some info? how can i get on the tester of the micro A01A and can i have acopy of that book , you have mentioned above , if you can, i will appreaciat your efforts. this is my mail : giath2008@hotmail.com
And straight from the book.

A defective sensor will usually display as [----]. The sensor or it’s
associated circuit may be open, shorted internally or shorted to
chassis ground. A direct short to chassis ground on a single sensor
may cause multiple sensor codes to appear.
1. Disconnected the sensor and temporarily connect a new sensor.
Display the sensor on the microprocessor display. If the
temperature can now be displayed the original sensor was
defective.
2. If the temperature is not displayed by the microprocessor unplug the
sensor and check for +5 vdc between CSTP and CSTN. If 5 volts is
not present check the microprocessor using Service Procedure
A01A.
3. If the microprocessor passes the test, disconnect the sensor
harness from the microprocessor and disconnect the suspected bad
sensor. Using a Fluke meter set for ohms check for shorts to
chassis ground on both the CSTP and CSTN wires of the suspect
sensor. If a short exists examine the wiring harness for chaffed
areas and repair as required.
4. If no shorts exist connect a jumper across the sensor connector.
Check continuity from CSTP to CSTN at the microprocessor
connector. The circuit resistance should be less than 1 ohm. If not,
check the harness and all associated connectors using the wiring
diagram for the unit.
5. If an intermittent problem exists monitor the voltage between CSTP
and CSTN at the sensor plug with the sensor connected. The
voltage should be approximately 2-4 vdc. If the voltage suddenly
increases the sensor is intermittently open. If the voltage suddenly
decreases look for an intermittent short or open in the wiring
between the microprocessor and the sensor.

[DaButcher]

Thank you Sir for your avaluable info. Anyway i have changed the monitor an the code 80 doesnot appear ( it went with wind )

Outstanding repair. Always possible that micro issues cause this type of alarm, but a process of elimination such as you did is the correct way.