Camus Hydronics MicoFlame Grande MFH2000, Installation, Operation And Service Manual

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26
13 TROUBLE SHOOTING GUIDE
SYMPTOM SOLUTION
1. Power light is not lit when switch is flipped to
“ON”
•
Check wiring to switch.
•
Activate push button for latch relay if
provided.
•
Check circuit breaker.
•
Check fuse.
2. Water flow light remains off.
•
Verify that pump is running.
•
Check wiring to flow switch.
3. Pilot sparks but does not light
•
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.
4. Pilot lights momentarily, goes out and then
sparks again repeatedly
•
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
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.
5. Pilot lights but main burner does not fire.
•
Verify that main manual valve is in “ON”
position.
•
Check wiring to valve from ignition control.
6. Main burner lights but cycles off after a few
minutes
•
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
igniter and ground electrode. Clean with
steel wool if necessary.
7. Appliance starts to whine as the temperature
rise increases.
•
Verify that all air is bled from system.
•
Verify that the static pressure in cold
system is at least 15 psig.
•
At system operating temperature static
pressure must be no less than 30 PSIG.
•
Check temperature rise across appliance
to ensure adequate water flow.
•
If necessary, increase static water
pressure and decrease gas pressure.