10.2
Visual inspection
WARNING
Danger for persons and system caused by unsafe operation of the measuring system
If the device is or could be in an unsafe state:
b
Put the device out of operation.
b
Disconnect the device from the main power supply and signal voltage.
b
Prevent unauthorized or unintentional start-up.
Malfunction
Action
Smoke
escapes from the
enclosure
1
Have the device repaired.
Gas
1
Immediately check whether the gas is noxious or combustible.
2
If this is the case: Immediately follow the local Operating Instructions
which control behavior during uncontrolled escape of gas.
Examples of behavior with uncontrolled escape of gas:
w
Stop the affected gas supply.
w
Trigger an alarm. Start emergency measures.
w
Immediately evacuate all persons from the affected operational
area.
w
Use breathing protection.
Moisture
penetrates the enclo‐
sure
1
Locate and stop the liquid source.
2
Have the device repaired.
on electrical connec‐
tions
1
Dry connections and interior of the enclosure.
Damage
Electric lines
1
Have the damage repaired by a skilled electrician.
Surface
1
Have the device repaired.
2
If caused by acute external influence: Locate the heat source and
protect the device provisionally against heat.
Unusual noises
Inside the device
1
Check malfunction indications and messages.
2
Have the device checked by a skilled person.
Malfunctions after fault
clearing
b
Contact SICK Customer Service.
Table 6: Visual inspection
10.3
Device not functioning
Possible causes
Action
Power supply not connected.
1
Check power cable and connections.
Power supply has failed.
b
Check power supply (e.g. socket, external disconnecting device).
Internal operating temperatures not
correct.
1
Check whether error messages exist.
Internal software not functioning.
Can only occur with complex internal malfunctions or after strong external influences
(e.g., strong electromagnetic interfering pulse).
1
Switch the GM32 off and on again after a few seconds.
Ex control unit does not switch on.
1
Protective gas feed interrupted or too low.
2
Ex control unit indicates an error (see Pressurized Enclosure System Manual).
Table 7: Device not functioning
10.4
Overpressure monitoring failure
The failure of the control unit has the following consequences:
10
TROUBLESHOOTING
84
O P E R A T I N G I N S T R U C T I O N S | GM32-Ex
8015558/YYJ8/V1.7/2016-07 | SICK
Subject to change without notice
