Olivetti d-color MF651, Service Manual, Page: 790 / 1053

19. TROUBLE CODE Field Service Ver. 2.0 Jul. 2009
730
TROUBLESHOOTING
C3822 Fusing abnormally low
temperature detection
(Edge of the heating
roller)
• The heating roller thermistor/2 continues to
detect a temperature lower than a predeter-
mined one for a predetermined period of
time.

A
C3824 Fusing abnormally low
temperature detection
(soaking side)
• The soaking roller thermistor/1 continues to
detect a temperature lower than a predeter-
mined one for a predetermined period of
time.
 A
C3825 Fusing abnormally low
temperature detection
(NC sensor)
• The heating roller temperature sensor/1
continues to detect a temperature lower
than a predetermined one for a predeter-
mined period of time.
 A
C3921 Fusing sensor wire breaks
detection
(Center of the heating
roller)
• At the warm-up stage, the heating roller
temperature sensor/2 voltage does not
decrease by predetermined steps (tempera-
ture rise) within a predetermined time.

A
C3922 Fusing sensor wire breaks
detection
(Edge of the heating
roller)
• At the warm-up stage, the heating roller
temperature sensor/3 voltage does not
decrease by predetermined steps (tempera-
ture rise) within a predetermined period of
time.

A
C3924 Fusing sensor wire breaks
detection (soaking side)
• At the warm-up stage, the soaking roller
thermistor/1 voltage does not decrease by
predetermined steps (temperature rise)
within a predetermined period of time.

A
C3925 Fusing sensor wire breaks
detection (NC sensor)
• At the warm-up stage, the heating roller
temperature sensor/1 voltage does not
increase by predetermined steps (tempera-
ture rise) within a predetermined period of
time.
 A
C392A Fusing sensor
contamination
(NC sensor)
• While checking the contamination on the
heating roller temperature sensor/1,
detected temperature of the heating roller
thermistor/1 exceeded the detected temper-
ature of the heating roller temperature sen-
sor/1 for over the predetermined value for
the predetermined period of time.
 A
C3B02 IH malfunction (CPU) • A failure in communication with the fusing
CPU continues for a predetermined period
of time.
 A
C3B03 IH malfunction (monitor) • Though the IH heater is ON, this status can-
not be detected mechanically. (IH heater
operation failure)
• Though the IH heater is OFF, mechanically,
the ON status is detected. (Malfunction of IH
heater operation)
 A
Code Item Detection timing
Trouble iso-
lation
Rank
Service Manual Y110571-1