No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
545 A
Fusing overheat error 3 (center)
After warmup, the center of the hot roller attained full operating temperature and
maintained this temperature for 10 sec. without the hot roller rotating.
• Center hot roller thermistor installed incorrectly, disconnected.
•
Center hot roller thermistor defective
1.
Check the hot roller thermistor is set correctly.
2. Replace the hot roller thermistor.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
547 D
• The zero cross signal is detected for 0.05 seconds three times even though
the heater relay is off when turning on the main power.
• The zero cross signal is not detected for 2 seconds even though the heater
relay is on after turning on the main power or closing the front door.
• Defective fusing lamp relay
• Defective fusing lamp relay circuit
•
Unstable power supply
1. Replace the fusing lamp relay.
2. Check the power supply source.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
551 A
Fusing thermistor open (end)
The temperature of the hot roller remained below 0
o
C for 5 sec. at the end of the
hot roller.
• Fusing thermistor out of its position because of incorrect installation
• Fusing thermistor disconnected or defective
•
Power supply not within rated range (15% or more below rating)
1. Check the fusing thermistor is set correctly.
2. Replace the fusing thermistor.
3. Check the power supply source.
3. Appendix: Service Call Conditions
64
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