Gasmaster GMI 2M, Installation, Operation And Maintenance Manual

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IOM GMI 2M & 2ML Nov 2010.doc
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4.2 Troubleshooting
Fault Cause
Corrective Action
♦
Blower does not start
♦
Power not supplied to the unit.
♦
Safety loop open.
♦
None of the above
♦
Ensure power switch is on.
♦
Check both fuses on the power and the supply
sides.
♦
Ensure BMS (if connected) calls for heat.
♦
Ensure high temperature limit switch is closed.
♦
Ensure maximum operating temperature switch
is closed.
♦
Ensure low gas pressure switch is closed.
♦
See page 20 of the Riello catalogue for burner
controller trouble shooting.
♦
Unit does not start
♦
Blower does not run.
♦
Air pressure switch installed
on the housing is open.
♦
Gas pressure switch is open.
♦
No ignition.
♦
See above
♦
Adjust switch.
♦
Replace switch (if defective).
♦
Adjust the switch.
♦
Replace switch (if defective).
♦
See page 20 of the Riello catalogue for burner
trouble controller trouble shooting
♦
Pilot flame failure
♦
Pilot gas valve not opened
♦
No ignition
♦
Check the electrical connections to ensure they
are all securely connected (see the schematic
wiring diagram for terminals).
♦
Check the two, safety shut off valves. Replace
if defective.
♦
Check the electrical connections to ensure they
are all securely connected (see “Factory Wiring
Diagram” on page 15 of the Riello catalogue)
for terminals.
♦
Check the flame rod to ensure it is clean and
free of any sedimentation. Clean flame rod if
necessary.
♦
Check the flame rod for any cracks or other
defects. Replace flame rod if necessary.
♦
Measure gas pressure in the pilot line at the exit
test port of the second safety valve (downstream
of the regulator). Ensure it is within the
specified 2”-5” wc. If pressure is not available
check both safety shut off valves and the
pressure regulator. Replace any defective
component, if necessary.
♦
Main flame failure
♦
Main gas valve not opened.
♦
Check the electrical connections to ensure they
are all securely connected.
♦
Check the two safety shut off valves. Replace if
defective.