Fault Indication Diagnosis (Rev 6/98)
112
03 (CH) (*) Return Air Sensor
Possible cause: open sensor lead.
Test procedure: test for continuity.
Possible cause: shorted sensor lead.
Test procedure: test for ground.
Possible cause: defective sensor.
Test procedure: test sensor voltage.
Possible cause: defective microprocessor.
Test procedure: replace microprocessor.
NOTE: Control changes to discharge air sensor.
04 (CH) (*) Discharge Air Sensor
Possible cause: open sensor lead.
Test procedure: test for continuity.
Possible cause: shorted sensor lead.
Test procedure: test for ground.
Possible cause: defective sensor.
Test procedure: test sensor voltage.
Possible cause: defective microprocessor.
Test procedure: replace microprocessor.
NOTE: Control changes to return air sensor. If both sen-
sors are faulty, the unit will shut down.
05 (ST) (*) Ambient Air Sensor
Possible cause: open sensor lead.
Test procedure: test for continuity.
Possible cause: shorted sensor lead.
Test procedure: test for ground.
Possible cause: defective sensor.
Test procedure: test sensor voltage.
Possible cause: defective microprocessor.
Test procedure: replace microprocessor.
06 (CH) (*) Engine Water Temperature Sensor
Possible cause: low coolant level.
Test procedure: check for low coolant alarm and check
coolant level.
Possible cause: high coolant temperature.
Test procedure: check coolant temperature.
Possible cause: faulty high coolant temperature switch.
Test procedure: test for continuity.
Possible cause: shorted HWT circuit.
Test procedure: test for ground.
Possible cause: defective microprocessor.
Test procedure: replace microprocessor.
Содержание Super II SR+
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Страница 26: ...Operating Instructions Rev 6 98 16 Control Box Cover AEA1354 ...
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Страница 42: ...Electronic Controls Rev 6 98 32 SOFTWARE REVISION 04XX ALARMS AEA1358 ...
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