SICK MCS300P, Руководство по эксплуатации

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66 8013741/16LH/V1-7/2020-04| SICK O P E R A T I N G I N S T R U C T I O N S | MCS300P Ex
Subject to change without notice
8
CLEARING MALFUNCTIONS
8.4 Heater failure
The MCS300P Ex has two heaters with temperature monitors to heat external
subassemblies (e.g., cell and heated sample gas line).
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Both heaters are switched off when one temperature exceeds the allowable limit value
(depending on the temperature class).
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After 15 minutes, the MCS300P Ex switches to error state “Failure” ( see “Classification,
LEDs”, page 36 ) because both heated subassemblies cool down.
▸
Switch the MCS300P Ex off and on again to switch the heaters back on.
8.5 Overpressure monitoring failure
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MCS300P Ex category 2G: A control unit failure triggers an automatic switch-off of the
MCS300P Ex.
●
MCS300P Ex category 3G: A control unit malfunction is only indicated with an alarm
signal on the Ex control unit with no automatic switch-off of the MCS300P Ex.
8.5.1 Possible causes
Further information → Pressurized Enclosure Manual ( see “Additional documentation/
information”, page 11 )
Possible cause Possible clearance
Protective gas feed interrupted Check protective gas feed
Screw fittings on connecting tube leaky
Tighten screw fittings
Torques:
Receiver side: 1 Nm (
see “Connecting tube,
receiver side”, page 63 )
Sender side: 2 Nm
Enclosure of sender or receiver unit leaky
Check screw fittings and seals (as shown in see
“Receiver unit screws”, page 59 ).