FULTON FHE-250 - 4.13.1 LOCK OUT ERROR CODES

FHE-250 MANUAL 09 2014 ISSUE 2
Page 54
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1. LOCK OUT ERROR CODES
Lock out error codes require a manual reset action after the source of the problem has been identied and eliminated. The meaning of the error numbers
are as follows:
ERROR
CODE
MEANING POSSIBLE CAUSE SOLUTION
A1
Lock out signal after no ame and all ignition trials are expired Description: This error condition stops the boiler from operating and manual/remote reset is required. Local resets are not limited. However remote resets (communication or Open Therm) are limited to 5 per hour.
a) Manually operated valves on the
gas train have been closed.
b) There is a blockage in the gas
line.
c) Modulating gas valve within the
boiler is not operating correctly.
d) Modulating gas valve within the
boiler has failed.
a) Check and open the manually operated valves
including the T-handle valve in the boiler shell.
b) Check the operation of any other equipment,
connected upstream of the boiler, on the gas line.
c) Check the tube between the gas valve and the
Venturi and ensure that both ends are properly connected.
d) Replace the modulating gas valve.
A2 False Flame Signal
A ame signal is seen without the gas valve being open.
Clean isolation probe. Reset lockout.
A3
Overheat Protection Description: This error code can be generated by one of two methods of overheat protection built into the boilers. A High Limit error can be generated even after a CH supply or return sensor short circuit condition occurs.
There is a signal coming from the CH ow or return temperature sensors in excess of 105°C, or the heat exchanger body is higher than 95°C, so the circuit is open through the high limit stat (this is normally closed).
a) Clean CH ow and return temperature sensors. b) Check wiring between the controller and the limit
stat and make sure that the wires connected are not loose. If all the wiring is ne then replace the high limit stat.
c) If the problem still persists, then replace ow and
return temperature sensors
A4
APS (Air Pressure Switch) Error Description: The APS is congured and does not close or does not open within set time limits. Error 4 is generated.
APS ap valve has stuck open, or closed.
Remove the apper house between the fan and the heat exchanger and clean the housing inside. If this does not solve the problem, then replace the APS apper.
A5
Fan Speed Feedback Error Description: The control requires a certain fan speed, but does not detect the correct signal.
The fan motor is not working correctly.
Replace the fan unit on the burner.
A6
APS (Air Pressure Switch) Error Description: If the APS is congured and it drops during burner operation and the number of maximum re-trials has been reached, Error 6 is generated.
A foreign body blocking the air supply.
Check that the airway to the burner is clear from obstructions.