KNA Burner Manual 9.801-300.0 rev. 8/13
23
Section: Honeywell Electronic Oil Primary
Table 7. Error Codes
Error Codes
No. of 1/4 sec Flashes
No Ignition / Late ignition 1
Max flame losses / CAD Cell
high while running
2
Flame out of sequence 3
Low Voltage /
EnviraCOM ™ error
4
Internal Error 5
R7284 Error Codes
(Basic Interface)
Troubleshooting and Maintenance
IMPORTANT
Due to the potential hazard of
line voltage, only a trained, experienced service
technician should perform troubleshooting pro-
cedures.
This control contains no field-servicable parts. DO
NOT attempt to take it apart. Replace entire control
if operation is not as described.
To completely troubleshoot an oil burner installation,
check the burner and oil primary control for proper
operation and condition.
Cad Cell Resistance Check
For proper operation, it is important that the Cad cell
resistance is below 1600 ohms. On the basic model
with LED interface, during a normal call for heat,
once the control has entered the Run mode, press
and release the "i" button.
On the advanced model with display, follow the
screen diagnostic procedure to read the Cad cell
resistance.
Preliminary Steps
1. Check wiring connection and power supply.
2. Make sure power is on to controls.
3. Make sure limit control is closed.
4. Check contacts between igniter and the elec-
trodes.
5. Check the oil pump pressure.
6. Check the piping to the oil tank.
7. Check the oil nozzle, oil supply and oil filter.
NOTICE
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