Honeywell R7284B Installation Instructions Manual page 11

EnviraCOM™
Display Alarm
Alarm Number
Flame Proven 34
Out of
Sequence
Flame Proven 23
During On
Delay
Flame Proven 24
During Off
Delay
Exceeded Max 22
Recycles
EnviraCOM™ 91
Error
Cad Cell 4
High During
Run
Flame Proven 9
Late in Trial
LED EnviraCOM™
Flash Alarm
Code Number
1 10,5,20,59,9
R7284B,P,U,G ELECTRONIC OIL PRIMARY, ENVIRACOM™ ENABLED
Table 7. Display Alarm Information. (Continued)
• The cad cell is permanently in a low resistance state. It should typically read much higher than
20,000 ohms when no flame is present.
• Set the display to display cad cell resistance.
• Shield the cad cell from light.
• If the display shows less than 20,000 ohms, unplug the cad cell,
— If display does not read 999999 ohms, replace control.
— If it does read 999999 ohms, replace cad cell.
• Flame was proven during the valve on delay period. Check the oil valve for proper operation.
• If the system does not have an oil valve, set the valve on delay to 0.
• Flame remained lit during the burner off delay. Check the oil valve for proper operation.
• If the system does not have an oil valve, set the burner off delay to 0.
• Flame was lost more than the allowed number of times. The burner lights, but does not remain lit.
• Check that the fuel tank is not empty.
• Check the fuel supply lines (and filter) for obstructions or air
— Use the pump priming feature to purge the system of airCheck
• Check that the burner motor is spinning and the pump is generating adequate pressure.
• If present, check operation of the oil valve.
• If the problem persists, proceed to the "Cad Cell, High During Run" corrective action.
• Communications error has been detected.
• Remove all devices from the EnviraCOM™ connections, 3-pin plug and screw terminals "1-2-3".
— If the error does not clear within one minute, measure the voltage on terminals "2" and "3".
— If the voltage across terminals "2" and "3" is between 20VAC and 30VAC, replace control.
— If it is outside of that range, review appliance wiring. There should be approximately 24VAC
across "2" and "3".
• The cad cell resistance is higher than normal while running, the system is in need of a tune up.
• Check for proper alignment of the cad cell and clean the eye if necessary.
• Check if the pump is generating adequate pressure.
• Check burner adjustments (refer to burner manufacturers instructions).
• Check for excessive soot build up in the burner and flue.
• Check for flue blockage.
• The burner lit very late during the trial for ignition and is susceptible to not lighting.
• Check cad cell for proper alignment and clean if necessary.
• Check burner adjustments (refer to burner manufacturers instructions)
• Check electrodes and spring contacts (if equipped) and adjust per manufacturers recommendations.
• Check if the pump is generating adequate pressure.
• Check the fuel supply lines and filter for obstructions.
Table 8. LED Flash Codes.
The burner was not lit or lit near the end of the trial time.
• Check that the manual shut off valve is open.
• Check that the burner motor is spinning and the pump is generating adequate pressure.
• Check the condition of the nozzle and replace if necessary.
• Check the fuel supply lines and filter for obstructions or air.
• Check the electrodes, spring contacts (or high voltage wires), and ignition transformer for proper operation.
• If a valve is present, check for proper operation.
• Check burner adjustments (refer to burner manufacturers instructions) and spark was not detected.
• Check the cad cell positioning and clean the eye.
• Expose the cad cell to ambient light (generally enough light to read by is adequate)
— If the LED does not turn on, short the cad cell terminals,
— If the LED does not turn on, replace the control,
— If the LED turns on, replace the cad cell.
• Shield the cad cell from light.
— If the LED does not turn off, unplug the cad cell,
— If the LED does not turn off, replace the control,
— If the LED turns off, replace the cad cell.
Corrective Action
Corrective Action
11 69-2467EFS—09