Fault Indication Diagnosis (Rev 6/98)
116
24 (SH) (*) Heating Cycle Fault
Possible cause: low on refrigerant.
Test procedure: check refrigerant level.
Possible cause: defective three-way valve.
Test procedure: check operation of three-way valve.
Possible cause: defective pilot solenoid.
Test procedure: check pilot solenoid operation.
Possible cause: defective K1 relay.
Test procedure: test K1 relay.
Possible cause: compressor inefficient.
Test procedure: check compressor capacity.
Possible cause: partial obstruction in low side of refrigera-
tion system.
Test procedure: locate and remove obstruction.
Possible cause: iced or dirty evaporator.
Test procedure: inspect/defrost evaporator coil.
Possible cause: fault in 26 circuit.
Test procedure: test 26 circuit.
Possible cause: defective microprocessor.
Test procedure: replace microprocessor.
25 (CH) (SH) (*) Alternator Check
Possible cause: loose or broken alternator belt.
Test procedure: check/tighten belt.
Possible cause: faulty alternator.
Test procedure: test alternator.
26 (CH) (*) Check Refrigeration Capacity
Possible cause: low on refrigerant.
Test procedure: check refrigerant level.
Possible cause: compressor inefficient.
Test procedure: check compressor capacity.
Possible cause: partial obstruction in low side of refrigera-
tion system.
Test procedure: locate and remove obstruction.
Possible cause: iced or dirty evaporator.
Test procedure: inspect/defrost evaporator coil.
Possible cause: faulty expansion valve.
Test procedure: test expansion valve operation.
Possible cause: plugged filter drier.
Test procedure: check filter drier.
Possible cause: defective microprocessor.
Test procedure: replace microprocessor.
27 (SH) (*) Extended Defrost
Possible cause: faulty defrost termination switch.
Test procedure: test defrost termination switch.
Possible cause: damper door not closing.
Test procedure: test damper door operation.
Содержание Super II SR+
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