Troubleshooting Guide
Contents
1. Troubleshooting Guide 78 Condition Possible Cause Instrument Inoperative Instrument not plugged into electrical outlet Power switch not in on position Blown fuse Loose connection to power switch Faulty power switch Faulty DC power supply No Microwave Power Instrument door ajar Incorrect percentage of power selected Interlock s not properly adjusted or faulty Faulty controller board Faulty thermal switch Faulty high voltage component Low Microwave Power Low line voltage Incorrect wattage parameter Incorrect voltage switch setting Incorrect percentage of power selected Faulty high voltage relay s Faulty high voltage component Fuse Blows When Door is Opened Interlock s not properly adjusted Faulty interlock s Fuse Blows Repeatedly During Operation Low line voltage Faulty high voltage component Faulty DC power supply Faulty controller board Faulty continuous power supply Inoperative Turntable Loose or broken turntable belt Faulty turntable motor Faulty controller board Turntable Not Alternating Loose or faulty turntable belt Faulty turntable sensor Faulty turntable motor Faulty controller board No Display Loose or broken wiring connections Loose or faulty interface cable Faulty display Faulty controller board Inoperative Keyboard Loose or faulty interface cable Faulty keyboard Faulty controller board Inoperative Vessel S2. ternating Slightly erratic pressure is normal if controlling pressure below 50 psi MARS 5 600110 79 Rev 6 80 Condition Possible Cause Vapors in Laboratory Loose drain valve Leakage from vessel Ruptured membrane Vent hose to fume hood not installed Faulty blower assembly No Rise in Pressure in Control Vessel Leakage at vent fitting Rupture membrane not installed Thermowell loose in vessel ESP 1500 unattached or faulty Sample does not absorb microwave energy Liquid does not generage pressure upon heating Covers not properly flared to ensure tightness in vessel No Rise in Temperature in Control Vessel Sample not microwave absorbing Temperature probe inserted incorrectly Temperature probe connected incorrectly Ruptured Optional Vessel Membrane Excessive amount of reactive organic sample Leakage from control vessel resulting in abnormal pressure buildup in other vessels Closed microwave transparent valve Venting Relief Valve Excessive amount of reactive organic compounds Closed microwave transparent valve Two way valve in incorrect position Loose Pressure Sensing Tube in Control Vessel Tubing not fully inserted and sealed into mating fitting with ferrule nut Closed microwave transparent valve MARS 5 600110 Rev 6
3. tirring Motor Loose or broken stirring motor belt Faulty Stirring Motor MARS 5 600110 Rev 6 Condition Possible Cause Erratic Pressure ESP 1500 Incorrect A D setting Leakage from vessel Loose vent fitting Improper installation into vessel support module Loose bulkhead connector Improper grounding connection Faulty ESP 1500 Faulty controller board Erratic Pressure External Water Line Leakage from vessel Loose vent fitting Loose connection on pressure relief valve Faulty pressure relief valve Loose connection on 2 way valve Faulty 2 way valve Faulty pressure transducer electrical connector Faulty pressure transducer Erratic Temperature EST 300 Incorrect A D setting Corroded connector on EST 300 or ESP 1500 Loose bulkhead connector Faulty EST 300 Faulty ESP 1500 Faulty controller board Erratic Temperature Fiber Optic Probe Broken thermowell Faulty fiber optic probe Faulty fiber optic controller board Arcing from EST 300 Overtightened or cracked locking nut Residue in tip of or on thermowell Burned or discolored tube in center of ESP 1500 Microwave Leakage Improperly adjusted instrument door Damaged instrument door Inoperative Cavity Light Faulty light bulb Loose connection s Faulty connection s Faulty controller board Tangled Pressure Sensing Line Control vessel not positioned properly in turntable Turntable not al
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