Dunkirk boiler troubleshooting

Dunkirk 95M-200 boiler troubleshooting

Boiler Not Firing And:Check For:StepCorrective Actions:
Control display blank120 vac at terminals LI and L2 of line voltage strip?1NO Check external line switch and fuse or breaker.
2Determine if red light on line voltage monitor is flashing indication fault. If there is fault verify input voltage dial is properly set in accordance with steps in installation manual. If fault does not clear after ten minutes replace line monitor.
120 vac on both sides of fuse FI? (Turn OFF external power to boiler before removing cover.1NO Turn off power to boiler and replace fuse if necessary. Inspect boiler interior wiring to determine cause of fuse opening.
Wiring correct, in good condition, and securely attached?1Correct if needed. Replace any damaged wiring or components. Replace control module if problem persists.
Display first digit shows 0; last digits snow 2 or 3-digit number (boiler outlet water temp.)Room thermostat and DHW aquastat satisfied?1YES Boiler off, no call for heat. Turn up thermostat or aquastat. Boiler should start.
Thermostat or aquastat calling for heat but boiler not firing.1Check voltage on both sides of low voltage fuse F3. (Turn OFF external power before removing cover.) If necessary, replace fuse. Determine reason for ruse failure if possible.
2Check/set boiler parameters 2 and 3. Make sure space heat or DHW is turned on. Turn on if necessary.
3Turn off power to boiler. Temporarily jumper low voltage terminal strip terminals T1 and T2 or DHW T1 and DHW T2. Retry. If boiler operates, check CH and DHW thermostat and wiring. Replace if necessary. Remove temporary jumper(s).
4Turn off power to boiler. Check wiring against wiring diagram; verify all wiring in good condition and secure.
5Replace wire harnesses and retry.
6Replace control module.
Display first digit shows number from 1 to 8; last digits show 2 or 3-digit number (boiler outlet water temp.)1Boiler in normal operating mode.
Display flashes "9," then " number. “b” Last two digits show code1See User Interface Quick Reference and Soft Lockout Troubleshooting for more information on soft lockout code.

Dunkirk PWXL boiler troubleshooting

Possible CauseWhat to do
Thermostat is not set correctlyReset thermostat above room temperature
Burner is not operating properlyCheck flame. If it is yellow, the burner is not getting enough air. Or, if flame is blue and noisy and seems to lift off the burner, the burner is getting too much air. Contact your service technician.
No electric power to boilerCheck over current protection. Check to be sure electric power supply circuit is “ON”.
Controls out of adjustmentReset according to instructions.
Radiators not heatingOpen radiator vents to excess air. Check flow control valve (if used). It may be in closed position.
Circulating pump not runningCheck over current protection. Check relay operation
Poor electrical contactCheck all control terminals and wire joints.
Rollout switch blownHave your service technician check heat exchanged for blockage. Replace rollout switch with exact replacement.
Spill switch blownHave your service technician check venting system and chimney for blockage, or down draft condition. Reset spill switch.
Vent damper not operatingConsult troubleshooting guide in Effikal manual, packaged with vent damper.
Gas input amount is incorrectContact your service Technician.
Dirt on valve SeatOpen valve manually. Allow water to run and clear valve seat.
Water-logged expansion tankDrain tank, see instructions.

Error codes and troubleshooting