Omron E5AZ, User Manual

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160
Appendix A
Note The tightening torque for E5CZ-U is 0.5 N·m.
During opera-
tion (continued) Temperature error is
large
Input error (S.err dis-
play) Thermometer has
burnt out or short-cir-
cuited. Check whether the thermometer has burnt
out or short-circuited ---
Thermometer lead
wires and power
lines are in the same
conduit, causing
noise from the power
lines (generally, dis-
play values will be
unstable). Wire the lead wires and power lines in sep-
arate conduits, or wiring using a more direct
path. ---
Connection between
the Temperature
Controller and ther-
mocouple is using
copper wires. Connect the thermocouple’s lead wires
directly, or connect a compensating con-
ductor suitable for the thermocouple. ---
Installation location
of thermometer is
unsuitable. Check whether the location of the thermom-
eter is suitable. ---
Input shift is not set
correctly (default:
0
°
C)
Set a suitable input shift. If input shift is not
required, set the input shift value to 0.0. 59
Keys will not operate Setting change pro-
tect is ON.
Turn OFF setting change protect. 78
Cannot shift levels Operations limited
due to protection. Set the operation/adjustment protect, initial
setting/communications protect, and set-
ting change protect values as required. 78
After long ser-
vice life Control is unstable Terminal screws
may be loose. Retighten terminal screws to a torque of
0.74 to 0.90 N
·
m. (See Note.)
22
The internal compo-
nents have reached
the end of their ser-
vice life. 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. ---
Timing Status Meaning Countermeasures Page