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8009389/YN39/V3-0/2015-08| SICK OPERATING INSTRUCTIONS|GM35
Subject to change without notice
TROUBLESHOOTING AND CLEARING MALFUNCTIONS
10 Troubleshooting and Clearing Malfunctions
This Section shows how Gas Analyzer GM35 malfunctions can be recognized, diagnosed
and cleared. It is primarily aimed at the operating personnel responsible for the current
operation of the measuring system as well as maintenance technicians responsible for
clearing malfunctions.
10.1 Malfunction categories/possible effects
GM35 malfunctions are categorized according to the anticipated effects:
Damage to the measuring system itself
Depending on the installation conditions and measuring system version, a purge air failure
could cause damage to the GM35.
“Purge air failure” describes the necessary emergency
and protective measures.
10.2 Purge air failure
Failure of the purge air supply demands measures to be taken immediately or within a
short time, depending on the installation conditions, to protect the measuring system. A
purge air failure, however, rarely occurs in practice. It is still however wise to be prepared
for such an occurrence to prevent damage to the measuring system.
Indications of a potential purge air failure
• Error message on systems that are equipped with a pressure difference sensor
• Purge air unit power supply failure
• Increase in the enclosure temperature of the GM35 SR-unit
• Rapid increase in contamination on the optical interface of the SR-unit
• Hose for the purge air supply to the purge air fixture is visibly loose or damaged.
Tools for troubleshooting
• Suitable protective equipment (protective clothing, protective gloves, etc.) that enable
the gas duct to be opened safely and the SR-unit as well as the measuring probe removed
under the given installation conditions (hot/corrosive/noxious/dusty sample gases,
overpressure in the duct).
• 2 wrenches to remove the measuring probe and, possibly, other tools required to restore
the power supply.
• Flange cover to seal off the flange opening when the measuring system is removed.
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