Filter
Top Products
Model GFC7000E Instruction Manual TROUBLESHOOTING & REPAIR PROCEDURES
04584 Rev A1 185
Table 11-1: Warning Messages - Indicated Failures
WARNING
MESSAGE
FAULT CONDITION POSSIBLE CAUSES
BENCH TEMP
WARNING
The optical bench temp
is controlled at 48 ± 5
°
C.
Bad bench heater
Bad bench temperature sensor
Bad relay controlling the bench heater
Entire relay board is malfunctioning
I
2
C buss malfunction
BOX TEMP
WARNING
Box Temp is < 5
°
C or
> 48
°
C.
NOTE: Box temperature typically runs ~7
o
c warmer than
ambient temperature.
Poor/blocked ventilation to the analyzer.
Stopped exhaust-fan
Ambient temperature outside of specified range
CANNOT DYN
SPAN
Dynamic Span
operation failed
Measured concentration value is too high or low.
Concentration slope value to high or too low
CANNOT DYN
ZERO
Dynamic Zero
operation failed
Measured concentration value is too high.
Concentration offset value to high.
CONFIG
INITIALIZED
Configuration and
Calibration data reset
to original Factory
state.
Failed disk on chip
User erased data
CONC ALRM1
WARNING
Concentration alarm 1
is enabled and the
measured CO
2
level is
≥ the set point.
CONC ALRM2
WARNING
Concentration alarm 2
is enabled and the
measured CO
2
level is
≥ the set point.
DATA
INITIALIZED
Data Storage in iDAS
was erased
Failed disk on chip
User cleared data
FRONT PANEL
WARN
The CPU is unable to
Communicate with the
Front Panel Display
/Keyboard
Warning only appears on serial I/O com port(s)
Front panel display will be frozen, blank or will not respond.
Failed keyboard
I
2
C buss failure
Loose connector/wiring
PHOTO TEMP
WARNING
PHT DRIVE is >2500
mVDC
Failed IR photo-detector
Failed sync/demod board
IR photo-detector improperly attached to the sample
chamber
Bench temp too high.
REAR BOARD
NOT DET
Mother Board not
detected on power up.
Warning only appears on serial i/o com port(s)
Front panel display will be frozen, blank or will not respond.
Massive failure of mother board
RELAY BOARD
WARN
The CPU cannot
communicate with the
Relay Board.
I
2
C buss failure
Failed relay board
Loose connectors/wiring
SAMPLE FLOW
WARN
Sample flow rate is <
500 cc/min or > 1000
cc/min.
Failed sample pump
Blocked sample inlet/gas line
Dirty particulate filter
Leak downstream of critical flow orifice
Failed flow sensor/circuitry