User Guide | Gas detecting sensor, type PAGM for CO2 and Halocarbon
© Danfoss | DCS (vt) | 2021.03
BC372016561395en-000101 | 7
4.3
Related to fault codes
page
The DIAG function displays sensor data and status information useful to users for troubleshooting
various fault conditions. Explanations of the data shown in these screens are given below.
First diagnostic screen
Code
Type
Description
<0001>
Box Temperature Fault
Enclosure temperature is outside normal range (or IR detector has
failed). Monitor has been subjected to extreme temperatures potential
damage to the unit.
Contact service department for further instructions.
<0002>
Bench Temperature Fault
Optical sensor is outside normal operating range (or IR detector has
failed). Monitor has been subjected to extreme temperatures potential
damage to the equipment.
Contact service department for further instructions.
<0004>
Manifold Pressure Fault
The manifold pressure is outside its normal operating range (or IR
detector has failed). Enter the DIAG function and record ALL data.
Contact service department for further instructions.
<0040>
Fill Flow Fault
The purge-air bag’s pressure drop is outside expected limits. Check for
a punctured bag or disconnected tubing. Refill the bag using FILLBAG
function - see manual for instruction.
If the issue persist contact service department.
<0080>
Over Range Fault
Monitor exposed to a gas level that exceeded 65,000 ppm
<0100>
Zero Filter Fault
PGM for halocarbons indicates contamination in the carbon filter. The
filter need to be replaced, replace the filter.
PGM for CO2
the purge-air bag is contaminated with gas. Take monitor
to a clean-air area and use the EMPTYBAG and FILLBAG functions to
decontaminate the purge-air bag,
If the issue persist contact service department.
<0200>
Gain Set Fault
The digipot autotune has failed.
Contact service department for further instructions.
<0400>
A/D Fault
A fault has occurred in the analog-to-digital circuitry. Turn on/off unit if
the issue persist. Contact service department for further instructions.
<0800>
Sample Flow Fault
Check for a restriction in the gas-sample inlet or exhaust. Check the
external Coalescing Inline Filter and/or internal Hydrophobic Filters
replace if necessary. Once the air stream has been restored, the
monitor will return to normal operation after it completes a purge
cycle. If the issue persist contact service department.
<1000>
Purge Flow Fault
Check for a restriction in the gas-sample exhaust. Check the external
Carbon Filter and/or internal Hydrophobic Filter replace if necessary.
Once the purge air stream has been restored, the monitor will return to
normal operation after it completes a purge cycle.
<2000>
Bag Fill Fault
A punctured bag or disconnected tubing. Refill the bag, FILLBAG
function - see manual for instruction. If the issue persist contact service
department.
<4000>
Zero Range Fault
The IR detector’s output voltage is out of tolerance. Enter the DIAG
function and record all data.
Contact service department for further instructions.
<8000>
Clipping Fault
The detector voltage may be out of tolerance. Use the DIAG function to
check the IR detector voltage.
Contact service department for further instructions.
Screen item
Description
Sensor voltage
This is the current peak-to-peak output of the IR detector. In the absence of gas this
value can range from 3.90000 – 4.50000 V
Noise
The noise value is a 16 point running average of the noise portion of the IR detector’s
output. This reading is valuable mainly when gas is NOT present.
Detector Temperature
This is the current detector temperature in °C
Box Temperature
This is the current internal enclosure temperature in °C
Fault Code
Current fault code. A value of <0000> indicates that no faults are being detected.
Pressure Reading
This is the pressure as measured every purge cycle with the sample pump off and the
gas-sample inlet open. Its value is weather and altitude dependent and can range
from 10.0 – 15.5 PSIA.
Purge Valve Asterisk (*)
The purge valve can be opened and closed by pressing the
Keypad Left
button
. An
asterisk appears on the display when the purge valve is open causing the monitor to
draw air from its purge-air port.
