MODEL GFC7000EU CO ANALYZER WITH
(Addendum to GFC7000E Manual PN 04584)
| Warning | Fault Condition | Possible Causes |
| Message | ||
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| FRONT PANEL | The CPU is unable to | WARNING only appears on Serial I/O COM Port(s) |
| WARN | Communicate with | Front Panel Display will be frozen, blank or will not |
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| the Front Panel | respond. |
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| Display /Keyboard | Failed Keyboard |
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| I2C Bus failure |
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| Loose Connector/Wiring |
| PHOTO TEMP | PHT DRIVE is | Failed IR |
| WARNING | >4750 mVDC or | Failed Sync/Demod Board |
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| <250 MVDC | IR |
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| Sample Chamber | |
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| BENCH TEMP too high. |
| REAR BOARD | Mother Board not | WARNING only appears on Serial I/O COM Port(s) |
| NOT DET | detected on power | Front Panel Display will be frozen, blank or will not |
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| up. | respond. |
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| Massive Failure of Mother Board |
| RELAY BOARD | The CPU cannot | I2C Bus failure |
| WARN | communicate with | Failed Relay Board |
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| the Relay Board. | Loose connectors/wiring |
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| PURGE PRESS | Purge Pressure | Loss of purge flow |
| WARN | outside of warning | Failed purge pressure sensor |
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| limits specified by | Purge pressure regulator not set properly |
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| PURGE_PRESS_SET |
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| variable |
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| SAMPLE PRES | Sample Pressure is | If Sample Pressure is < 15 |
| WARN | <15 | Blocked Particulate Filter |
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| > 35 | Blocked Sample Inlet/Gas Line |
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| Normally 29.92 in- | Failed Pressure Sensor/circuitry |
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| Hg at sea level | If Sample Pressure is > 35 |
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| decreasing at 1 in- | Blocked Vent line on pressurized |
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| Hg per 1000 ft of | |
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| Sample/Zero/Span gas supply | |
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| altitude (with no | |
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| Bad Pressure Sensor/circuitry | |
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| flow – pump | |
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| Failed Permapure dryer | |
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| disconnected). | |
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| SAMPLE TEMP | Sample temperature | Ambient Temperature outside of specified |
| WARN | is < 10oC or > | range |
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| 100oC. | Failed Bench Heater |
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| Failed Bench Temperature Sensor |
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| Relay controlling the Bench Heater |
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| Failed Relay Board |
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| I2C Bus |
| SOURCE | Occurs when CO Ref | GFC Wheel stopped |
| WARNING | is <1250 mVDC or | Failed Sync/Demod Board |
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| >4950 mVDC. | If Status LED’s on the Sync/Demod Board ARE |
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| flashing the cause is most likely a failed: |
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| Either of these | IR Source |
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| conditions will result | Relay Board |
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| in an invalid M/R | I2C Bus |
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| ratio. | IR |
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| SYNC | Phase Lock Loop | GFC Wheel stopped |
| WARNING | (PLL) has lost lock | GFC Wheel rotation very slow/dragging |
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6 | 05134 Rev - |