Service And Repairs; Exchanging The Calculator; Troubleshooting - INTEGRA Metering CALEC ST III User Manual

Service and repairs

8 Service and repairs
8.1

Exchanging the calculator

Disconnect CALEC® ST III from the power supply.
u
Take off the front cover [}p. 20].
u
Pull the calculator (1) to the front to remove.
u
w The calculator (1) can be shipped for calibra-
tion.
Plug the new calculator (1).
u
w The new calculator automatically updates it-
self after plugging it in.
8.2

Troubleshooting

If a fault occurs, the message «ALARM» will appear on the display.
The display flashes red to indicate the alarm message.
l
The short message in the information loop gives details of the reason for the fault/alarm.
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Message
th-ERROR
tc-ERROR
SYSt-Error
52 / 56
Electric shock
Touching energized system parts can cause immediate death or serious injury.
u Make sure that installation work is only carried out by authorized specialists.
Before carrying out any work on the system, disconnect the power supply and check that
u
no voltage is present.
If an insulation is damaged, disconnect the power supply immediately and arrange for im-
u
mediate repair.
Error/ alarm
Temperature error on hot
side, no measurement possi-
ble
Temperature error on cold
side, no measurement possi-
ble
EEPROM memory error
DANGER
1
Possible cause
Sensor connected incor-
l
rectly
Interruption/short circuit
l
in sensor cables
Component error
l
Device error
l
Analog-Digital-Converter
l
not working
Corrective measures
Check wiring.
u
Check disconnected sen-
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sor wires with ohm meter.
Check the input with a re-
u
sistor:
Pt 100: 100-150 Ω
Pt 500: 500-620 Ω
Send the device to be
u
checked.
3-140-UM-EN-02