SERVICE MANUAL - O. Rensch OHG

2DC
Code
Contents
Causes
Remarks
Check procedures/corrective measures
C6000
Broken fixing heater wire
• In fixing warm-up, the time to reach
50°C/122 °F exceeds 13.5 s, the time
to reach 100°C/212 °F exceeds 10 s,
the time to reach the primary stabilization
exceeds 10 s or the time to
reach the secondary stabilization exceeds
24 s.
Poor contact in
the thermistor
connector terminals.
Thermistor installed
incorrectly.
Thermal cutout
triggered.
Check the connection of connector CN4 on
the power supply board (KP-5059) and the
continuity across the connector terminals.
Repair or replace if necessary.
Check and reinstall if necessary.
Check for continuity. If none, replace the
thermal cutout.
Heater lamp installed
incorrectly.
Check and reinstall if necessary.
Broken heater
lamp wire.
Check for continuity. If none, replace the
heater lamp.
C6020
Abnormally high fixing unit thermistor
temperature
• The fixing temperature exceeds
230°C/446 °F for 40 ms.
Shorted thermistor.
Broken heater
control circuit on
the power supply
board (KP-5059).
Measure the resistance. If it is 0 Ω, replace
the thermistor.
Replace the power supply board (KP-5059)
and check for correct operation.
C6050
Abnormally low fixing unit thermistor
temperature
• The fixing temperature remains below
90°C/194°F for 1 s.
Poor contact in
the thermistor
connector terminals.
Check the connection of connector CN4 on
the power supply board (KP-5059) and the
continuity across the connector terminals.
Repair or replace if necessary.
Broken thermistor
wire.
Measure the resistance. If it is ∞ Ω, replace
the thermistor.
Thermistor installed
incorrectly.
Check and reinstall if necessary.
Thermal cutout
triggered.
Check for continuity. If none, replace the
thermal cutout.
Heater lamp installed
incorrectly.
Check and reinstall if necessary.
Broken heater
lamp wire.
Check for continuity. If none, replace the
heater lamp.
C6400
Zero-crossing signal problem
• The engine board (KP-5061) does not
detect the zero-crossing signal for the
time specified below.
At power-on: 3 s
Others: 5 s
Poor contact in
the connector terminals.
Defective power
supply board (KP-
5059).
Check the connection of connectors YC7
on the engine board (KP-5061) and CN2
on the power supply board (KP-5059), and
the continuity across the connector terminals.
Repair or replace if necessary.
Check if the zero-crossing signal is output
from CN2-11 on the power supply board
(KP-5059). If not, replace the power supply
board (KP-5059).
Defective engine
board (KP-5061).
Replace the engine board (KP-5061) if
C6400 is detected while CN2-11 on the
power supply board (KP-5059) outputs the
zero-crossing signal.
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