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Step
1
Access diagnostics menu P.-18.
2
Press and hold both the UP and DOWN buttons for 5
seconds. This will cause the following to occur:
•
•
•
3
After 3 seconds the user is returned to the parameter list at
parameter P.-18.
4
The gas detector may now be re-programmed for further
troubleshooting if needed.
8.4. Other Symptoms
Other common wiring problems can also cause the gas detector to
malfunction. Check below for additional conditions that will cause gas
detector issues.
Table 20: Other Symptoms and Possible Causes
Symptom
Green power LED
off
Alarms in the
absence of a leak
6490-9000 Revision 3
All the LED segments will then light for 3 seconds
The gas detector resets to the default settings
The gas detector beeper sounds for 3 seconds.
Check power supply. Check wiring.
If you experience alarms in the absence of a leak, try
setting an alarm delay.
Perform a bump test to ensure proper operation.
Description
Possible Cause(s)
MGS-250 Manual
57
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