WILLETT 430 - Page 173

430 Ink Jet Printer Service and Maintenance Manual
156
Issue 2
Part No. 306-0430-102
Fault Possible Cause Remedial Action
VMS incorrectly calibrated Check ink viscosity (see
Ink Viscosity Measurement
,
page 41). If incorrect, drain the mixer tank and refill with
new ink (see
Fill Mixer Tank
, page 31). Recalibrate the
VMS (see
VMS Calibration
, page 32).
Mixer OK, sensor or cable
faulty
Go to the Diagnostic screen of the Calibrate menu
(see
Calibrate Menu
, page 106). If Mixer OK is OFF then
the sensor circuit is faulty.
Check that the sensor cable is connected.
Replace FMS (see
Fluid Management System (FMS)
,
page 121) if level sensor is faulty.
Replace I/O board (see
I/O Board
, page 62) or
CPU board (see
CPU Board
, page 56).
Faulty valve on ink or top up
reservoir
Replace valve if faulty (see
Solenoid Valves
, page 127).
Mixer Tank Level
High-Sensor
Covered
Valve stuck internally Clean valve V2 (ink) and V1 (top up)
(see
Valve Cleaning
, page 157). Replace valve if fault
remains (see
Solenoid Valves
, page 127).
Cable between Mixer level
high sensor and I/O is faulty
or disconnected
Check that cable is connectedMixer Tank Level
High-Sensor
Uncovered
Mixer level high sensor
circuit faulty
If sensor faulty, replace FMS (see
Fluid Management
System (FMS)
, page 121).
Replace I/O board (see
I/O Board
, page 62) or
CPU board (see
CPU Board
, page 56).
Table 44 Mixer Tank Level High Possible Causes