Copyright Pyroban Ltd. Issue 1 Page 27 of 32
Part number PM1083ENG
Control Module
Explanation
Flammable warning - Low concentration of gas or vapour detected
(>10% LEL).
The vehicle must be removed from the gas contaminated area immediately
and the Person in Authority informed.
Gascheka duo™ will automatically reset if the concentration of flammable
gas or vapour detected returns to a safe level.
Gascheka duo™ will automatically shut down if the concentration of
flammable gas or vapour increases above the trip threshold
Flammable shutdown - High concentration of flammable gas/vapour
detected (>25% LEL).
Vehicle shuts down automatically, either immediately or after a short time
delay. The Person in Authority must be informed.
Do not restart Gascheka duo™ until this procedure has been completed
and permission to restart has been granted by the Person in Authority.
Gascheka duo™ may then be reset by placing the red supervisor Dallas
key on to the key receptor on the Control module.
Restart Gascheka duo™ in the normal way, using either the green or blue
key.
Automated gas test failure. Investigation required.
Pyroban equipment and vehicle disabled. The Person in Authority must be
informed.
The green Test indicators (1, 2, 3 ) will show the test at which the
automated gas test failed.
Test 1
Warm up period. No checks or failures during this period.
Test 2
Gas response check and calibration
Potential reasons for failure on Test 2.
•
Test gas cylinder empty.
•
Test gas regulator output pressure adjusted incorrectly.
•
Test gas tube disconnected or kinked.
•
Faulty gas sensing head
•
Faulty Control module.
•
Gas sensing head lead disconnected or faulty.
Test 3
Gas diffusion rate check (sinter blockage check)
If the detection head output does not fall sufficiently fast this is an
indication that the sinter may be blocked.
Potential reasons for failure on Test 3.
•
Blocked sinter
This test may also be failed if insufficient gas was available during Test 2.
Check the following
•
Test gas cylinder empty.
•
Test gas regulator output pressure adjusted incorrectly.
