Ricoh D124-17 Service Manual page 606

6. Troubleshooting
SC280
SC282
SC282-11
SC282-12
SC282-13
SC282-14
SC282-15
SC283 D
SC285 C
604
D Air detection sensor error
A problem has occurred at the terminal pin sensor on top of one of the sub
tanks, or the maintenance unit is not functioning correctly.
• Terminal pin defective
• Maintenance unit defective
D Air Detection Frequency Error
The amount of air allowed in the print head tank exceeded the threshold from
the start of checking cycle. If the machine remains idle, small amounts of air
will leak slowly into one or more of the sub tanks.
There are two thresholds:
• The first threshold sets the amount of leakage within a 10-day period.
• The second threshold sets the amount of leakage allowed greater than a
10-day period.
D Head 1
D Head 2
D Head 3
D Head 4
D Multiple Heads
• Cycle the machine off/on.
Ink End Detection Error
The mechanical ink end sensor has failed, or one of the ink supply pumps has
failed.
• Cycle the machine off/on
• Ink end sensor defective
• Replace ink supply unit
DRESS Sensor Calibration Error
The reflected beams was measured less than 400 when the head gap was
adjusted automatically.