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VI
CTORY VSPH Models
25
General Troubleshooting Guide For Service Personnel
TOP JACKETTOP JACKET
F
LUE COLLECTORFLUE COLLECTOR
I
NDUCERINDUCER
BRUSHBRUSH
WARNING: Only a trained, experienced service technician should perform troubleshooting.
Turn off all electric power to the boiler before servicing.
A. BURNERS FAIL TO OPERATE- NO HEAT
CA
USE
1. No power, POWER LED off. Main electric switch open.
Blown or defective line fuse.
2. Gas supply valve shut off. Gas valve knob is on “off” posi-
tion. FLAME LED flashing.
3. Flame sensor contaminated.
4. Pilot flame too low.
5. Roll-out switch open. POWER and TSTAT/CIRC LED’s are
on.
6. Harnesses plug-in connectors are not securely connected
7. Defective transformer.
REMED
Y
1. Close switch. Check and replace
2. Open gas supply valve.Turn gas valve knob to “on “ posi-
tion. Check gas pressure.
3. Clean sensor.
4. Adjust pilot flame.
5. Check roll-out switch for continuity replace if blown out
(inspect flue passages prior to replacement).
6. Check connectors on boiler control.
7. Remove P2 connector from boiler control. Check trans-
former terminals for 24V. Replace defective transformer.
Figure 22. Flue passage cleaning illustration