Flowserve Valtek StarPac 1 Intelligent Control Systems User Manual
Page 27
41-27
Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611
Failure
Probable Cause
Corrective Action
Local display not on
1. 24 VDC not on or set correctly
1. Verify power supply is outputting 24 VDC
(+3 volts) at terminals 1 and 2
2. Incorrect wiring polarity
2. Check wiring for correct polarity
3. Interface connections on bottom
3. Make sure connections are correctly
are not correct
aligned and fully plugged in
Local display has black
1. RESET switch was left down or
1. Set RESET switch to up position or boxes
showing dimly
system not completely initialized
completely reinitialize system
Erratic communications
1. Multiple units have same address
1. Change each unit to a unique, sequential
on network line
address (refer to Address Setting in
Maintenance section)
2. Proper polarity not maintained
2. Check all network connections for cor-
rect positive and negative connections
3. Individual units not properly wired
3. Begin with shortest RS-485 run, check-
ing polarity and communication; continue
checking units throughout network
4. Termination jumper not installed
4. Install termination jumper on two most
distant devices
StarPac does not
1. StarPac still in initialize mode
1. Be certain the INIT switch is up, then
respond to analog
change the mode in the tuning screen
commands
2. I/P not connected
2. Be certain the two-wire cable is con-
nected on the bottom board
StarPac data is not
1. Improper configuration file was
1. Find the correct file for this system and
correct
loaded onto system
send to the StarPac; refer to the Utility
or Technician sections of the StarPac
manual
Valve position reading
1. Hallpot connection not tight
1. Tighten hallpot connection set screw
is not correct
2. Stroke not calibrated
2. Calibrate valve stroke; refer to
Calibration section
3. Hallpot shaft is at end of stroke
3. Readjust hallpot shaft connection; make
sure shaft does not reach rotation stop
in either direction
Stem position
1. Hallpot wiring harness is installed
1. Reverse three-wire harness
decreases when valve
backwards
opens
Troubleshooting StarPac Intelligent Control Systems