R7284B,P,U,G ELECTRONIC OIL PRIMARY, ENVIRACOM™ ENABLED
69-2467EFS—07 10
Table 6. Troubleshooting Information.
Condition: Burner does not start with a call for heat
Procedure Control Status Corrective Action
Review error history if
control in lockout
-- Refer to Error Codes table of this section
Check that limit switches
are closed
Display models: display
shows status of limit switch.
Replace limit switch or clean contacts.
Check TT status Display models: display
shows status of TT.
• Most hydronic systems require TT to be jumpered.
Display models can be configured to behave as
though the TT terminals are jumpered. LED
models require a jumper be added.
• Warm air systems will short TT terminals during a
call for heat. Check that TT is really shorted during
the call for heat.
Check for line voltage
power at R7284
-- Check breaker and investigate appliance wiring
Check status of cad cell Display models: display
shows cad cell resistance.
LED models: LED is on if cad
cell is too low to start.
• Replace cad cell
• If operation does not resume, remove leadwires
from R7284.
• If operation does not resume, replace control.
Condition: Burner does not stop when call for heat ends
Procedure Control Status Corrective Action
Check TT status Display models: display
shows status of TT.
• Check if a TT jumper is installed. When the R7284
and L7224/L7248 electronic Aquastat are
connected via the EnviraCOM bus, neither a
physical jumper across the TT terminals or a
configured TT jumper should be present on the oil
primary.
• Check if the R7284 is configured to ignore the TT
terminals.
• Verify thermostat contacts have opened. There
should be 24VAC across TT terminals when there
is not call for heat.
Check limit status Display models: display
shows status of limit.
Measure voltage on Limit terminal. There should be
no voltage between Limit and Neutral when the
contacts are open. Replace limit switch if necessary.
Check if other
EnviraCOM devices are
commanding the R7284
to run
Display models: display
shows "TT Remote" if an
EnviraCOM device is
commanding it to run.
Unplug all EnviraCOM devices from R7284. It should
turn off within 5 minutes.
Table 7. Display Alarm Information.
Display
Alarm
EnviraCOM™
Alarm
Number Corrective Action
No Ignition
Check Igniter
10
•
The burner was not lit and spark was not detected. Check the electrodes, spring contacts (or high
voltage wires), and ignition transformer for proper operation.
•
If spark ignition is functioning acceptably, proceed to “No Ignition” corrective action.
No Ignition
Check Cad
Cell
5
•
The cad cell detected some amount of light during the ignition trial, but not enough to enter run
mode. Check the cad cell positioning and clean the eye.
•
Set the display to show the cad cell resistance.
•
Shield the cad cell from light.
•
If the display shows is less than 20,000 ohms, unplug the cad cell.
— If the display does not read 999999 ohms, replace control
— If it does read 999999 ohms, replace cad cell.
•
Expose the cad cell to ambient light (generally enough light to read by is adequate)
•
If the display shows more than 2000 ohms, short the cad cell terminals.
— If the display shows more than 5 ohms, replace control
— If less than 5 ohms, replace cad cell.
•
If the burner still does not light, proceed to “No Ignition” corrective action.
No Ignition 20
•
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.
•
If a valve is present, check for proper operation.
•
Check burner adjustments (refer to burner manufacturers instructions)
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