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Teledyne Microscope & Magnifier GFC7000E Manuale Utente

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Model GFC7000E Instruction Manual 
TROUBLESHOOTING & REPAIR PROCEDURES 
04584 Rev A1 
192 
 
Table 11-5:   Relay Board Status LED Failure Indications 
SIGNAL I/O PARAMETER 
LED FUNCTION 
ACTIVATED BY 
VIEW RESULT 
DIAGNOSTIC TECHNIQUE 
D2 
Yellow 
WHEEL 
HEATER 
WHEEL_HEATER WHEEL_TEMP 
Voltage displayed should change.  If not: 
Failed Heater 
Faulty Temperature Sensor 
Failed AC Relay 
Faulty Connectors/Wiring 
D3 
Yellow 
BENCH 
HEATER 
BENCH_HEATER BENCH_TEMP 
Voltage displayed should change.  If not: 
Failed Heater 
Faulty Temperature Sensor 
Failed AC Relay 
Faulty Connectors/Wiring 
D4 
Yellow 
SPARE 
N/A N/A 
N/A 
D5 
Green 
SAMPLE/CAL 
GAS VALVE 
OPTION 
CAL_VALVE N/A 
Sample/Cal Valve should audibly change 
states.  If not: 
Failed Valve 
Failed Relay Drive IC on Relay Board 
Failed Relay Board 
Faulty +12 VDC Supply (PS2) 
Faulty Connectors/Wiring 
D6 
Green 
ZERO/SPAN 
GAS VALVE 
OPTION 
SPAN_VALVE N/A 
Zero/Span Valve should audibly change 
states.  If not: 
Failed Valve 
Failed Relay Drive IC on Relay Board 
Failed Relay Board 
Faulty +12 VDC Supply (PS2) 
Faulty Connectors/Wiring 
D7 
Green 
SHUTOFF 
VALVE OPTION  SHUTOFF_VALVE 
N/A 
Shutoff Valve should audibly change 
states.  If not: 
Failed Valve 
Failed Relay Drive IC on Relay Board 
Failed Relay Board 
Faulty +12 VDC Supply (PS2) 
Faulty Connectors/Wiring 
D8 
Green 
IR SOURCE 
IR_SOURCE CO
2
_MEASURE 
Voltage displayed should change.  If not: 
Failed IR Source  
Faulty +12 VDC Supply (PS2) 
Failed Relay Board 
Failed IR Photo-Detector  
Failed Sync/Demod Board 
Faulty Connectors/Wiring 
 
11.1.5. Gas Flow Problems 
In general, flow problems can be divided into three categories: 
1.  Flow is too high 
2.  Flow is greater than zero, but is too low, and/or unstable 
3.  Flow is zero (no flow) 
When troubleshooting flow problems, it is a good idea to first confirm that the actual flow and not 
the analyzer’s flow sensor and software are in error, or the flow meter is in error. Use an