MSA MultiGard 5000 - Page 70

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3103-1001 Rev. 0
the trouble condition has been cleared. The horn will resume pulsing immediately if another trouble
condition occurs or, in 30 minutes if the trouble condition is not cleared. The only exception is a
trouble condition indicating an auto standardization low level tolerance has been exceeded. Once
acknowledged, the horn relay will not re-activate unless triggered by some other condition.
Other trouble conditions as shown in Table 5.3 will also result in a trouble indication similar to the
above.
Table 5.3: MultiGard 5000 Trouble Conditions
Sensor drift below scale
PIR not ready
Flow fail, sample manifold
Auto-standardize low tolerance exceeded
Flow fail, bypass manifold
Auto-standardize high tolerance exceeded
Sample manifold failed diagnostic leak test
No calibration/purge gas
Bypass manifold failed diagnostic leak test
Loss of memory, default parameters forced
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Dual MultiGard 5000 Systems
On the dual MultiGard 5000 systems, the “Loss of memory, default parameters forced” trouble
conditions are common to the entire assembly and are indicated on System A. They are not
duplicated on System B
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WARNING
Wire Trouble Relay to operate an externally powered device (horn,
beacon, computer, PLC, etc.) using the common and normally closed
contacts for fail-safe operation on loss of power. The Trouble Relay
is an important safety device and failure to wire as specified may
result in no indication should gas detection system malfunction
and/or become disabled.