-74-
No.PF
※※
-OMU0007-B
Problem
No.
Problem
Possible cause
Investigation method
Countermeasures
13
Display
measurement
units cannot be
changed.
Model selection
(the model
selected does
not have the
units selection
function)
Check if the product number printed
on the product indicates a type with
units selection function.
Units selection function is
not available for the fixed SI
units type.
: The units selection function is
not for use in Japan
: Fixed to SI units: L/min
Product failure
Replace the product.
14
Buttons do not
operate.
Key-lock mode is
activated
Check if the key-lock function is
turned on.
Check the key-lock function.
Product failure
Replace the product.
15
The operation is
unstable.
(chattering)
Effect of line
pressure
fluctuation
because
hysteresis is too
narrow or delay
time of the switch
is too short
(1) Check the set pressure values
(hysteresis).
(2) Check the delay time and digital
filter set values.
(1) Adjust the set flow value.
(2) Change the response
time setting.
Incorrect
wiring/broken
lead wire
(1) Check the power supply wiring.
(2) Check if there is bending stress
applied to any part of the lead
wire.
(bending radius, tensile force to
the lead wire)
(1) Check and correct the
wiring.
(2) Correct the wiring.
(Reduce the tensile force
or increase the bending
radius.)
Product failure
Replace the product.
16
Not able to copy
Specifications
are not
consistent with
the master.
Check if the input specification,
output specification and unit
specifications are consistent with the
master monitor.
Use a product for which the
specifications are the same
as the master's specification.
Product failure
Replace the product.
