Endress+Hauser Topclean S CPC30, Руководство по эксплуатации

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8 Troubleshooting Topclean S
132 Hauser
8.2 Response of outputs to errors
8.2.1 Current output behaviour
If an error occurs in the system, an error current is output at the current output. You can adjust the
value of this error current in the Alarm menu (see page 65).
If you have configured the controller for functioning with current output 2, this output does not
output an error current if an error occurs.
8.2.2 Response of contacts to errors
You can set each individual error message to trigger or not to trigger an alarm (see table on page 125,
editing errors on page 65). In "NAMUR" mode, failure messages always trigger an alarm.
Behaviour with standard setting
Instrument gets hot Incorrect mains voltage or too high Compare mains voltage and nameplate
rating.
Power unit defective Replace power unit. All 6 red LEDs on the M3G module must
be lit
Incorrect measured pH /
mV value and / or
measured temperature
value Transmitter module defective (module:
MKP2), please carry out tests and
measures first as described in chap. 8.1.2 Test measuring inputs:
– Connect pH, Ref and PA directly on the
instrument with wire jumpers:
Display must be pH 7.
– Resistance 100
Ω
of Terminals 11 to 12+
13.
Display must be 0 °C.
If test negative: Replace module MKP2,
bushing using the device view on
page 135
Current output,
Current value incorrect Calibration incorrect:
– Load too high
– Shunt / short-circuit to frame in
current circuit
Test with integrated current simulation,
connect mA meter directly to current
output. If simulation value incorrect: new module
M3Cx-x
required.
If simulation value correct:
check current circuit for load and shunts
Incorrect operating mode Check whether 0–20 mA or 4–20 mA is
selected.
No current output signal Jumper incorrectly set Change coding. See chap. 8.4.2
Current output stage defective
(Module: M3CH-x) Test with integrated current simulation,
connect mA meter directly to current
output. If test negative:
Replace module M3CH-x
(Check variants, see spare parts list in
chap. 8.3)
Instrument with PROFIBUS
®
interface PROFIBUS
®
instruments do not have a cur-
rent output.
For information, see "DIAG" / internal
data
Error Possible cause Tests and / or remedial action Equipment, spare parts,
personnel
Instrument status Alarm relay Limit value / Controller
Normal operation picked-up (Fail-safe behaviour) Corresponding to
configuration and operating
status
Alarm Dropped out
Voltage-free Dropped out Dropped out
Hold Picked-up Corresponding to
configuration and operating
status.