Troubleshooting
Manual Part Number:
C5-06-4900-08-0
Revision Level: C
ECO 8029
File Name: MN-A-0008
Page 4-19
4.3
Troubleshooting
4.3.1
Fault Codes
When trouble occurs during normal operation of the Model 5100E, the user has several tools available to
aid in isolating the cause(s) of given symptoms. As a starting point, the user may use the control panel to
enter into “View Active Faults” mode (section 3.2.4). The user may also view active faults and other useful
information via the Service Port (section 4.1.2). In addition, there are four system Hot-Keys available to
perform special functions, and to gather important information quickly and easily (Appendix-D).
Descriptions of faults are given below, with indication of common causes. Refer to the appropriate sections
of this manual for more details as needed.
4.3.1.1
Fault Code 1
–
Sensor is warming up
The “Sensor warming up” fault indicates that the oxygen sensor is being heated to its operating
temperature. Fault code 1 activates for about 60 seconds after the analyzer is powered up. The purpose of
the alarm is to provide a control output to indicate that the sensor has not yet reached its operating
temperature, and the Model 5100E is not yet ready for in-service oxygen measurement. After the warm-up
period is complete the fault indication will be de-activated.
4.3.1.2
Fault Code 2
–
Relays are in Standby mode
Fault 2 indicates that the analyzer relay outputs, which are the alarm 1 relay, alarm 2 relay, fault relay, and
temperature OK relay, are in s
tandby mode. The relays are “locked” at the last valid condition before the
relay standby mode is initiated. The situations that initiate relay standby modes are:
•
The unit is powered up or power cycled (Note that the relays will be in the inactive mode).
•
The unit is warming up.
•
The unit is being calibrated.
•
The Alarm 1 and/or Alarm 2 setpoints are being changed.
•
The active Fault modes are being viewed from the front panel.
After a certain period of time the fault 2 will be de-activated. The factory default setting for the Standby
Mode period is 120 seconds (appendix C). The relay Standby Mode timer may be programmed in the user
mode (section 4.1.2.10.6).
4.3.1.3
Fault Code 3
–
Device is in Setup mode
Fault 3 activates when a user has accessed the User Setup Menu either via the Front Panel Display or the
RS-232 interface. Fault 3 will be de-activated when the user exits the User Setup Menu.
4.3.1.4
Fault Code 5
–
Analog Output range overflow
Fault 5 is activated when the analog outputs (4-20mA and 0-1/0-5/0-10VDC) cannot represent the
measured analyzer reading because the oxygen concentration is higher than the set display range (section
4.1.2.11.1). For example, if the display range is set to represent 0-25%, and the current oxygen
concentration measured is 30%, Fault 5 will be activated. Fault 5 will not be activated when the oxygen
concentration measurement is below the manual analog output range.