Troubleshooting Si10-417
140 Service Diagnosis
5.3.8 Over-voltage Detection
Remote
Controller
Display
U2
Method of
Malfunction
Detection
An abnormal voltage rise is detected by checking the
detection circuit or DC voltage detection circuit.
Malfunction
Decision
Conditions
An over-voltage signal is fed from the over-voltage
detection circuit to the microcomputer, or more than
430 V occurred the voltage detected by the DC
voltage detection circuit.
The system will be shut down if the error occurs 4
times.
Clearing condition: Continuous run for about 60
minutes (normal)
Supposed
Causes
Supply voltage not as specified
Over-voltage detector or DC voltage detection circuit
defective
PAM control part(s) defective
Si10-417.fm Page 140 Wednesday, September 22, 2004 6:38 PM
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