H25-IR
Operation
Instruction 3015-5286
39
5.1.2 Last Fault
The Last Fault screen provides a text description of all current faults being detected by the instrument. Once the
cause of the fault(s) has been cleared, its description is removed from the screen. The name of the last fault,
however, is retained on the screen. This is useful in determining the cause of an intermittent type fault.
To display the Last Fault screen, first display the Diagnostics menu as described in Section 5.1. Next, use the
Up
and
Down
buttons to highlight “LAST FAULT” and then press
ENT
. If necessary, use the
Up
and
Down
buttons to scroll through the fault list. A list of fault messages along with possible causes and remedies for the
fault is shown below. The numbers in brackets “< >” are the fault numerical codes that appear on the
Diagnostics Sensor Data screen (refer to Section 5.1.1).
TIP:
The Last Fault screen can be cleared of all faults per Section 5.1.6 Clear Last Fault.
Fault Codes are Additive:
The fault codes
appearing on the Sensor Data, Diagnostics screen
(refer to Section 5.1.1) are additive. For example: A
fault code of <0810> indicates that both a Search
Flow Fault <0800> and a Loop Open error <0010>
have occurred.
Box Temp Error <0001>:
Enclosure temperature
is high. Check that the enclosure is not being
subjected to extreme temperatures. Use the Sensor
Data screen to check the box temperature (refer to
Section 5.1.1).
Bench Temp Error <0002>:
Optical bench
temperature is high. Check that the enclosure is not
being subjected to extreme temperatures. Use the
Sensor Data screen to check the box temperature
(refer to Section 5.1.1).
Loop Open <0010>:
The 4
20 mA current loop is
open, or there is a high resistance in the circuit.
Check the wiring to the load/monitoring circuit. If
this feature is not being used, a 100 ohm resistor
must be connected to the 4
20 mA output
connector (refer to Section 2.7).
Internal CAL Error <0020>:
An internal calibration
failure has occurred. Repeat internal calibration
procedure per Section 3.2.
External CAL Error <0040>:
An external calibra-
tion failure has occurred. Repeat external calibra-
tion procedure per Section 3.3.
Digipot Range Error <0200>:
The digital
potentiometer circuit is out of its normal operating
range. Call Bacharach Service with this information
for further instructions.
Leak Pressure Fault <0100>:
A low pressure
condition within the internal leak source has been
detected, possibly due to the leak source being out
of gas. Check that the box temperature sensor is
properly calibrated per Section 5.2.6.3. If leak
source is empty, call Bacharach Service.
A/D Failure <0400>:
A failure has occurred in the
instrument’s analog-to-digital circuitry. Call
Bacharach Service with this information for further
instructions.
Search Flow Fault <0800>:
This error occurs in
the search mode when the gas flow through the
detector has significantly changed. Check that the
probe connector is plugged into the instrument, the
probe hose is not kinked, and the filter in the probe
tip is not clogged. Also check for a blocked internal
filter or failed pump.
Measure Flow Fault <1000>:
This error occurs in
the measure mode when the gas flow through the
detector has significantly changed. Check that the
probe connector is plugged into the instrument, the
probe hose is not kinked, and the filter in the probe
tip is not clogged. Also check for a blocked internal
filter or failed pump.
No Flow <2000>:
Gas flow through the detector
has stopped. Check that the probe hose is not
kinked, and the filter in the probe tip is not clogged.
Also check for a blocked internal filter or failed
pump.
Zero Volt Error <4000>:
The detector’s output
voltage may be out of tolerance. Use the Sensor
Data screen to check the detector voltage (refer to
Section 5.1.1). Call Bacharach Service with this
information for further instructions.
A/D Clipping Error <8000>:
The detector voltage
may be out of tolerance. Use the Sensor Data
screen to check the detector voltage (refer to
Section 5.1.1). Call Bacharach Service with this
information for further instructions.
Summary of Contents for H25-IR
Page 6: ...Contents H25 IR iv Instruction 3015 5286 Notes ...
Page 26: ...Preparing for Operation H25 IR 20 Instruction 3015 5286 Notes ...
Page 34: ...Calibration H25 IR 28 Instruction 3015 5286 Notes ...
Page 43: ...H25 IR Operation Instruction 3015 5286 37 Notes ...
Page 68: ...Specifications H25 IR 62 Instruction 3015 5286 Notes ...
