Emerson OCX 8800 Instruction Manual page 110

OCX 8800
Board Temp Hi (Electronics temperature maximum exceeded, > 85ºC)
Probable Cause
Electronics housing exposed to high ambient
temperature
EEPRM Chksm Fail (Non-volatile parameter storage corrupted)
Probable Cause
Unit powered down during calibration parameter
storage
Flash PROM failure
O2 Temp Low (Oxygen sensor heater temperature low, < 710ºC)
Probable Cause
Sensor housing exposed to high wind and/or
extreme cold temperatures
High noise or voltage fluctuations in power
supply
COe Temp Low (Combustion sensor heater temperature low, < 290ºC)
Probable Cause
Sensor housing exposed to high wind and/or
extreme cold temperatures
High noise or voltage fluctuations in power
supply
SB Temp Low (Sample block heater temperature low, < 150ºC)
Probable Cause
Sensor housing exposed to high wind and/or
extreme cold temperatures
High noise or voltage fluctuations in power
supply
Line Freq Error (AC power line frequency out of usable range, < 45 Hz or > 66 Hz)
Probable Cause
High noise or voltage fluctuations in power
supply
AC power line frequency is outside the usable
range of the OCX universal power supply
Electronics package failure
Line Voltage Low (AC power line voltage below minimum, < 85 VAC)
Probable Cause
High noise or voltage fluctuations in power
supply
Electronics package failure
8-8
Recommended Corrective Action
Insulate housing from source of high temperature and/or install cooling fan to remove
heat from housing. Perform Reset procedure in Section 3, Configuration and Startup to
continue operation.
Recommended Corrective Action
Perform Reset procedure in Section 3, Configuration and Startup. Recalibrate the OCX
and check/trim analog outputs.
Replace electronics package.
Recommended Corrective Action
Install sensor housing flange insulator (PN 6P00162H01).
Check power supply for line noise or voltage fluctuations. Install filter power line kit
(PN 6A00171G01) or high quality line filter for input power.
Recommended Corrective Action
Install sensor housing flange insulator (PN 6P00162H01).
Check power supply for line noise or voltage fluctuations. Install power line filter kit
(PN 6A00171G01) or high quality line filter for input power.
Recommended Corrective Action
Install sensor housing flange insulator (PN 6P00162H01).
Check power supply for line noise or voltage fluctuations. Install power line filter kit
(PN 6A00171G01) or high quality line filter for input power.
Recommended Corrective Action
Check power supply for line noise or voltage fluctuations. Install power line filter kit
(PN 6A00171G01) or high quality line filter for input power.
Correct power supply frequency. AC power line frequency must be between 50 and
60 Hz.
Check power supply frequency with a calibrated oscilloscope or frequency meter and
compare with line frequency. Replace electronics package if they do not agree within
1 Hz.
Recommended Corrective Action
Check power supply for line noise or voltage fluctuations. Install power line filter kit
(PN 6A00171G01) or high quality line filter for input power.
Check power supply voltage and compare with line voltage. Replace electronics
package if they do not agree within 5%.
Table continued on next page
Instruction Manual
IM-106-880, Rev 1.0
January 2007