MGS-250 Manual
6490-9000 Revision 4
53
Section 8. Troubleshooting
8.1. Fault Codes
To comply with the requirements of EN378 and the European F-GAS
regulation, gas detectors must be tested annually. However, local
regulations may specify the nature and frequency of this test.
The MGS-250 features sophisticated internal status monitoring and will
indicate whether a fault condition exists, both on the front display (F.-XX,
with XX being the fault number) and over the Modbus communications
network.
There are two classes of fault conditions: critical and non-critical. In
general, non-critical faults occur…
…when environmental conditions exist that are
outside the product’s specified operating range, or if
an installation error has occurred (wrong wiring, for
example).
The gas detector will typically continue to monitor its surroundings
(except for fault F.-08), and may report inaccurate readings and false
alarms.
Correcting non-critical faults is a matter of waiting for the environmental
conditions to return to a more typical condition, correcting wiring
mistakes, or in some cases, relocating the gas detector. For example,
placing the gas detector near a forced air heater may cause temperature
faults. The non-critical fault range is F.-01 to F.-08. Critical faults
indicate…
…a functional problem that results in the gas
detector no longer monitoring its surroundings for
refrigerant.
The fault number is displayed and the power LED is turned off, indicating
that the gas detector is offline. The critical fault range is F.-09 to F.-16.
If any of these faults occur, first try to clear the faults by cycling power to
the sensor. The easiest way to do this is by removing the sensor from
the base and reattaching. If the fault returns after cycling power, the gas
detector should be removed from service and replaced.
Additionally, the faults are stored as a hex number and can be accessed
in the Diagnostics menu P.-18. The associated hex codes are listed next
to the Fault Code in
Table 18
. Refer to Diagnostics Menu P.-18 in the
next section for additional information.
www.calcert.com
1.888.610.7664
0
5
10
15
20
25
30
