SMC Networks ZK2-ZS L A Series Operation Manual page 76

Error
Problem
No.
The display units
12 cannot be
changed.
The buttons
13 cannot be
operated.
The product is
14
noisy.
Operation is
15 unstable
(chattering).
Possible cause
Improper model
selection
Check if there is a "-M" at the end of
(Selection of
the part number printed on the
model "without unit
product.
selection
function")
Product failure
Key-lock mode is Check if the key-lock function is turned
activated. on.
Product failure
Air or liquid Check if air or liquid are leaking from
leakage the piping.
Product failure
Effect of line
pressure
fluctuation
(1) Check the set pressure values
because
(hysteresis)
hysteresis is too
(2) Check the response time.
narrow or
response time is
too short
(1) Check the power supply wiring.
(2) Check if there is bending stress
Incorrect wiring/ applied to any parts of the lead
broken lead wire wire.
(Bending radius and tensile force applied
to the lead wire)
Product failure
-75-
Investigation method Countermeasure
"-M" in the part number
means that the
measurement unit cannot
be changed.
(kPa or MPa can be
selected.)
: The unit selection function is
not available in Japan due to
a new measurement law.
: It is fixed to the SI unit "kPa",
"MPa".
Replace the product.
Release the key-lock
function.
Replace the product.
Rework the piping.
If the tightening torque is
exceeded, the mounting
screws, brackets and the
pressure switch may be
damaged.
Replace the product.
(1) Widen the hysteresis.
(2) Change the response
time setting.
(1) Correct the wiring and/or
load resistance
(2) Correct the wiring.
(Reduce the tensile force or
increase the bending
radius.)
Replace the product.
Doc. No. DOC1051887