Bacharach HGM-SZ Specifications download pdf (Page 28)

Single Zone Gas Monitor

24 P/N: 3015-4256 Rev 13

3.5.4. Fault Codes

FAULT CODES ARE ADDITIVE. For example: A fault code of <1800> indicates that both a Purge Flow

Fault <1000> and a Zone Flow Fault <0800> have occurred.

Code Name Description

<0001> Box Temperature

Fault

Enclosure temperature is outside normal range (or IR detector has

failed). Check that the monitor is not being subjected to extreme

temperatures. Verify that the ventilation holes are not obstructed.

Use the DIAGNOS function (page 26

)

to check the Box

Temperature.

<0002> Bench

Temperature Fault

Optical bench is outside normal operating range (or IR detector has

failed). Check that the monitor is not being subjected to extreme

temperatures.

<0004> Manifold Pressure

Fault

The manifold pressure is outside normal operating range (or IR

detector has failed). Enter the DIAGNOS function (page 26) and

record ALL data. Call the factory with this information for further

instructions.

<0010> Loop Fault 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

connector (page 16).

<0100> Zero Filter Fault There is gas present in the purge air. Locate the monitor in an area

containing fresh air, or install a purge air line. Refer to page 7.

<0200> Gain Set Fault The digipot autotune sequence has failed. This fault will only occur

on first boot up or after a firmware upgrade. Call the factory for

further instructions.

<0400> A/D Fault A fault has occurred in the analog-to-digital circuitry. Contact the

factory with this information for further instructions.

<0800> Zone Flow Fault Check for:

A kink in the gas-sample line or exhaust line; a blocked external

termination filter; a blocked internal hydrophobic filter (page 11); a

failed pump.

<1000> Purge Flow Fault Check for:

A kink in the purge line; a blocked external termination filter; a

blocked internal hydrophobic filter (page 11); a failed pump. Once

the blockage has been cleared, the monitor will return to normal

operation after the monitor completes a purge cycle.

<4000> Zero Fault The IR detector’s output voltage is out of tolerance. Enter the

DIAGNOS function (page 26) and record ALL data. Call the factory

with this information for further instructions.

<8000> Clipping Fault

The detector voltage may be out of tolerance. Use the DIAGNOS

function (page 26) to check the IR detector voltage. Call the factory

with this information for further instructions.

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Bacharach HGM-SZ Specifications Page 28

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