Mark V ProVis Injection System
15 - 26
REVERSE PLUNGER MOTION DETECTED
The plunger has moved in the reverse direction during an injection.
**REV MOTOR MOVEMENT
While the injector was armed, the motor moved reverse 2 ml or more
without a reverse command. This message can be triggered by an
electrical malfunction or improper operating technique.
To verify electrical malfunction:
1. Arm the injector and check the motor knob for plunger
movement. If moving, the PDC may be miscalibrated.
2. If there is no plunger movement, replace the Servo Control
Card.
3. If unable to confirm electrical malfunction, this message
also appears if the motor knob on the rear of the head is
turned after the injector is armed, or during the arming
sequence.
SCC: +10V REF FAILURE
The +10 V reference supplied by the Servo Control Card, and used by
the feed-back pots in the head, is out of specification. Remove and
reapply power, then attempt to operate the unit again.
Procedure:
1. Remove power, disconnect the injector head cable, then
retry. The message CHECK INJ HEAD CABLE PL should
appear. If so, the error condition lies in the injector head,
continue with step 4.
2. If the condition persists, check the +15 VDC supply on the
servo control board, which powers the +10V reference
chip.
3. If the condition persists, replace the Servo Control Card.
4. If the condition persists, check for shorts in the injector
head cable, internal wiring, connectors, and feedback pots.
SCC: FLOW DAC FAILURE
Flow Rate DAC output on the Servo Control Card is not within allow-
able limits. Remove and reapply power, then attempt to operate the
unit again. If the condition persists, replace the Servo Control Card.
SCC: MS DAC FAILURE
Mechanical Stop command DAC output on the Servo Control Card is
not within allowable limits. Remove and reapply power, then attempt
to operate the unit again. If the condition persists, replace the Servo
Control Card.
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