WESTLOCK CONTROLS CORPORATION
280 N. MIDLAND AVE., STE. 258, SADDLE BROOK, NJ 07663 TEL: 201-794-7650 FAX: 201-794-0913
www.westlockcontrols.com
10/5/2013
TECH-477/D.W.O. 21424
Page 49 of 206
Message Meaning
Solution
Wrong delta
value
An unknown
error has
occurred during
calibration
Check:
Remove power for at least 1 minute and retry
Remove power for at least 1 minute, perform a factory
default (see 17 - Appendix G – Procedure to Reset the
Non-Volatile Memory to Factory Settings) and retry a full
auto CAL
Call factory for additional support
PWM
overflow
During
calibration an
error occurred
with the PWM
signal that
control the
spool-valve
driver and the
position is not
following the
control signal
Check:
Hall sensor connector and cable, especially if remote (see
Figure 5-4, connector J8)
Magnet assembly is in correct position.
o
For rotary magnets check if it is not rotated 90
degrees (see Figure 5-2 & Figure 5-3).
o
For linear magnets, check if the magnet assembly
center is matching the actuator mid position (see
Figure 5-5). Check if the proper fail-down or fail-
up magnet is being used (Figure 7-1 & Figure 7-
2)
Check if the cable between the inner canister and the
pneumatic transducer assembly is tightly connected
Check the cable and connector between the transducer
board and the spool-valve coil.
Try to replace the Hall sensor and/or the magnet
Remove power for at least 1 minute and retry
Remove power for at least 1 minute, perform a factory
default (see 17 - Appendix G – Procedure to Reset the
Non-Volatile Memory to Factory Settings) and retry a full
auto CAL
Call factory for additional support
