Installation Guide

R7284B,P,U,G ELECTRONIC OIL PRIMARY, ENVIRACOM™ ENABLED
69-2467—01 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.
• 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.