Model 360E Instruction Manual TROUBLESHOOTING & REPAIR PROCEDURES

Table 11-1: Warning Messages - Indicated Failures

WARNING
MESSAGE FAULT CONDITION POSSIBLE CAUSES
BENCH TEMP
WARNING The optical bench temp is
controlled at 48 2 °C.
Bad bench heater
Bad bench temperature sensor
Bad relay controlling the bench heater
Entire relay board is malfunctioning
I2C buss malfunction
BOX TEMP
WARNING Box Temp is
< 5 °C or > 48 °C.
NOTE: Box temperature typically runs ~7oc 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 con centration 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 CO2 level is ≥
the set point.

CONC ALRM2

WARNING
Concentration alarm 2 is enabled
and the measured CO2 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
I2C buss failure
Loose connector/wiring
PHOTO TEMP
WARNING PHT DRIVE is
>4800 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.
I2C 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
SAMPLE PRES
WARN Sample Pressure is <10 in-Hg or
> 35 in-Hg
Normally 29.92 in-Hg at sea level
decreasing at 1 in-Hg per 1000 ft of
altitude (with no flow – pump
disconnected).
If sample pressure is < 10 in-hg:
o Blocked particulate filter
o Blocked sample inlet/gas line
o Failed pressure sensor/circuitry
If sample pressure is > 35 in-hg:
o Pressurized sample gas. Install vent
o Blocked vent line on pressurized sample/zero/span gas
supply
o Bad pressure sensor/circuitry

05232 Rev B3 193