Troubleshooting Guide - Camus Hydronics MFH060 Installation, Operation And Service Manual

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TROUBLESHOOTING GUIDE

SYMPTOM
1. Power light is not lit when switch is
flipped to "ON"
2. Water flow light remains off.
3. Pilot sparks but does not light
4. Pilot lights momentarily, goes out
and then sparks again repeatedly
5. Pilot lights but main burner does not
fire.
6. Main burner lights but cycles off after
a few minutes
7. Boiler starts to whine as the
temperature rise increases.
SOLUTION
•
Check wiring to switch.
•
Check circuit breaker.
•
Check fuse.
•
Verify that pump is running.
•
Check wiring to flow switch.
•
Verify that main manual valve is open.
•
Follow lighting instructions to bleed air out of pilot
line.
•
Remove main burner and inspect for moisture or
dirt in pilot or in pilot line.
•
Verify that pilot is sealed to main burner base.
•
Verify that gas connections are tight.
•
Observe pilot for proper flame. Adjust if necessary.
•
Check pilot flame signal. Properly set pilot to
generate 1.5 µA. D.C. on average.
•
Remove main burner and ensure that the igniter
and ground electrodes are positioned properly.
Clean with steel wool if necessary.
•
Verify that back of burner box is fully engaged into
the retaining slot in the combustion chamber base.
•
Verify that high limit is set high enough to prevent
short cycling.
•
Check pilot flame signal (µA).
•
Adjust pilot pressure for steady flame
•
Remove main burner. Check position of the igniter
and ground electrode. Clean with steel wool if
necessary.
•
Verify that high limit is set high enough to prevent
short cycling.
•
Adjust pilot pressure for steady flame
•
Remove main burner. Adjust pilot shield and clean
ignition sensor.
•
Verify that all air is bled from system.
•
Verify that the static pressure in cold system is at
least 15 psig.
•
Check temperature rise across boiler to ensure
adequate water flow.
•
If necessary, increase static water pressure and
decrease gas pressure.
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