SERVICE CALL CONDITIONS
B234/B235/B236/D101/D102/D103 4-30 SM
Fusing Temperature Warm-up Error
SC542 A
One of the following occurred:
• B234/B235/D101/D102: Hot roller did not reach
target operation temperature within 360 sec. after
the machine was powered or 360 sec. minutes after
the doors were closed.
• B236/D103: Hot roller did not reach target operation
temperature within 465 sec. after the machine was
powered or 465 sec. minutes after the doors were
closed.
• Fusing temperature rose only 5
o
C toward the fusing
temperature within 20 s after the machine was
powered on, or after the doors were closed.
• Fusing temperature rose only 5
o
C toward the fusing
temperature within 20 s after thermistor started
monitoring hot roller temperature. (The thermistors
starts monitoring 25 s after the hot roller starts
rotating.)
• Fusing lamp(s)
disconnected
• Thermistor out of
position
Fusing Overheat Error 1: Software
SC543 A
A fusing temperature of over 210°C is detected
for 5 s by the fusing thermistor. This prevents
the fusing lamps from switching on without a
fusing lamp trigger signal.
• AC drive board defective
(TRIAC short)
• BCU defective
• BCU firmware defective
Fusing Overheat Error 2: Hardware
SC544 A
The fusing temperature monitoring
circuit detects abnormal fusing
temperature.
• AC drive board defective (TRIAC
short)
• BCU defective
• BCU firmware defective
Fusing Overheat Error 3: Continuous Lamp On
SC545 A
After warm-up and while the hot
roller is not rotating, the fusing lamps
remain on at full power for 45 s
(B234/B235/D101/D102)
& 90 s (B236/D103).
• Fusing thermistor out of position
• One or more fusing lamp is
disconnected
Zero-Cross Signal Not Detected
SC547 A
The applied bandwidth is
detected above 66 Hz or below
45 Hz, and no zero-cross signal
detected for 5 s with the power
relay ON.
• Noise on the ac power line
• Cycle the machine off/on
• If the problem continues, install a noise
filter
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