Omron E5CZ User Manual page 183

Timing
During opera- Temperature error is
tion (continued) large
Input error (S.err dis-
play)
Keys will not operate Setting change pro-
Cannot shift levels
After long ser- Control is unstable
vice life
Note The tightening torque for E5CZ-U is 0.5 N·m.
160
Status Meaning
Thermometer has
burnt out or short-cir-
cuited.
Thermometer lead
wires and power
lines are in the same
conduit, causing
noise from the power
lines (generally, dis-
play values will be
unstable).
Connection between
the Temperature
Controller and ther-
mocouple is using
copper wires.
Installation location
of thermometer is
unsuitable.
Input shift is not set
correctly (default:
0°C)
tect is ON.
Operations limited
due to protection.
Terminal screws
may be loose.
The internal compo-
nents have reached
the end of their ser-
vice life.
Countermeasures
Check whether the thermometer has burnt
out or short-circuited
Wire the lead wires and power lines in sep-
arate conduits, or wiring using a more direct
path.
Connect the thermocouple's lead wires
directly, or connect a compensating con-
ductor suitable for the thermocouple.
Check whether the location of the thermom-
eter is suitable.
Set a suitable input shift. If input shift is not
required, set the input shift value to 0.0.
Turn OFF setting change protect.
Set the operation/adjustment protect, initial
setting/communications protect, and set-
ting change protect values as required.
Retighten terminal screws to a torque of
·
0.74 to 0.90 N m. (See Note.)
The Temperature Controller's internal elec-
trolytic capacitor depends on the ambient
temperature, and load rate. The structural
life depends on the ambient environment
(shock, vibration). The life expectancy of
the output relays varies greatly with the
switching capacity and other switching con-
ditions. Always use the output relays within
their rated load and electrical life expect-
ancy. If an output relay is used beyond its
life expectancy, its contacts may become
welded or burned. Replace the Tempera-
ture Controller and all other Temperature
Controllers purchased in the same time
period.
Appendix A
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