Nor-Cal Intellisys TSS - Manual (Page 12)

12 12 Visit our Web Site www.n-c.com
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5.3 - Troubleshooting
Some basic troubleshooting can be done by the user referring to the instructions and suggestions below. Table 5.3 describes possible
symptoms and recommended actions.
TAbLE 5.3 – pOSSIbLE FAILURE mODES AND RECOmmENDED ACTIONS
Symptom possible Causes Recommended Action
The TSS valve does not appear to turn on or oper-
ate.
The TSS is not connected to the controller module
(standard TSS models only)
Check to make sure the controller-to-valve cable
is connected at both ends, using the correct con-
nectors.
The controller-to-valve cable is faulty (standard
TSS models only)
Try another TbV-CRD-XX cable.
The controller module is not on, or is faulty.
Check controller module and refer to appropriate
controller Operating Manual
The Oldham coupling is broken
Turn off controller power. Remove motor drive to
inspect Oldham coupling
The TSS appears to operate but pressure- or posi-
tion control is inconsistent and poor
The valve gate is jammed or partially jammed in
the valve bore.
Turn off controller power and remove the motor
drive from the gearbox. Attempt to move
the gearbox input shaft by hand. If binding is
observed, remove valve from system to deter-
mine the root cause. Clean off process residue as
necessary using a non-abrasive method. If dam-
aged parts are found, contact Nor-Cal Intellisys
Customer Support
The Oldham coupling disk is worn or cracked
Turn off controller power. Remove drive unit from
gearbox. Replace the Oldham coupling disk as
necessary.
A whining or buzzing sound is heard from the TSS
motor drive
The Oldham coupling disk, or possibly hubs, is
loose or worn and a harmonic resonance point has
been excited
Turn off controller power. Remove drive unit from
gearbox. Replace the Oldham coupling disk as
necessary. If problem persists, contact Nor-Cal
Intellisys Customer Support.
The controller motor control coefficients have
been corrupted.
Turn off controller power. Turn back on and allow
initialization sequence to complete
The wrong controller is being used.
Note model and serial number of valve and con-
troller and contact Nor-Cal Intellisys Customer
Support
The motor and valve shaft rotate continuously in
one direction without stopping and without mov-
ing the valve gate
The square key between the rotary shaft and
gearbox is missing or broken.
Remove the rotary indicator disk, spacer and
screw. Remove the four screws holding the gear-
box to the valve. Slide off gearbox / motor assem-
bly from rotary shaft and inspect key and shaft
keyway. Replace items as necessary.
The gate actuation arm is broken or otherwise
decoupled.
Turn off vacuum system. Open the bonnet cover
by loosening the bolts on back plate. look inside
to inspect short gate arm that links the rotary
shaft to the gate and carriage mechanism. NOTE:
It is impossible to move or turn the shaft with
the gearbox attached. If manual operation is
required, then removal of the gearbox is neces-
sary (see step above).
The valve has developed a leak to atmosphere
along the valve shaft
O-ring damage and/or loss of vacuum grease can
cause this
Follow steps above to open bonnet cover AND
remove gear head. Remove the square and plates
found under the gearbox, and remove the short
gate arm attached to the shaft. Pull shaft out
from bearing and seal cavity (this may require a
tool (Please contact Nor-Cal Intellisys Customer
Support to obtain instructions). Visually inspect
the seal, relubricate or replace as necessary.
Global Sales and Service : Nor-Cal Products maintains sales and service centers in over 30 countries worldwide. Please visit our
website at http://www.n-c.com to find the center nearest you.