120
106309-03 - 4/19
XII. Troubleshooting
(continued)
Lockout Number
Condition
Possible Cause
3
Burner Interlock Open (ILK OFF)
ILK safety limit input not energized
Lockout input (ILK) is not ON. Refer to Limit String Status screen for
list of limits.
• Man Reset Ext. Limit device open or jumper not installed
• High or low gas pressure switch open or jumper not installed
• Thermal link open
• Burner door thermostat open
• Loose or defective limit string wiring
4
Supply high limit
R7910 supply sensor detected
temperatures in excess of 210°F.
• Heating load at time of error was far below the minimum firing
rate of the boiler.
• Defective system circulator or no flow in primary loop.
• Defective boiler circulator, no flow or insufficient flow in boiler loop.
• Control system miswired so that the boiler operation is
permitted when no zones are calling.
6
Stack High limit
R7910 Flue gas (Stack) sensor detected
temperatures in excess of 204°F (95.6°C).
• Heat exchanger needs to be cleaned.
• Boiler over-fired.
• Air-fuel mixture out of adjustment - consult factory.
12
Flame detected out of sequence
A flame signal was present when there
should be no flame.
• Defective gas valve - make sure inlet pressure is below
maximum on rating plate before replacing valve.
14
Delta T Inlet/Outlet High
Temperature rise between supply and
return is too high.
Inadequate boiler water flow.
• Boiler pump not operating
• Boiler pump undersized
• Valve closed
15
Return Temperature
Higher Than Supply
Return temperature was greater than
supply temperature for at least 75
seconds.
• Reversed flow through boiler. Verify correct piping and circulator
orientation.
• No boiler water flow. Verify system is purged of air and
appropriate
valves are open.
• Defective supply or return sensor
16
Supply Temperature Risen Too
Quickly
Supply water temperature has risen too
quickly.
• Inadequate boiler water flow. See also causes for Hard Lockout 4.
• Boiler pump not operating
• Boiler pump undersized
• Valve closed
18
Light off rate proving failed
Blower is not running at Light-off rate
when it should or blower speed signal not
being detected by R7910.
• Loose connection in 120 VAC blower wiring.
• Loose or miswired blower speed harness.
• Defective blower
19
Purge rate proving failed
Blower is not running at Purge rate when
it should or blower speed signal not being
detected by R7910.
• Loose connection in 120 VAC blower wiring.
• Loose or miswired blower speed harness.
• Defective blower
20
Invalid Safety Parameters
Unacceptable R7910 control Safety
related parameter detected.
Parameters change was invalid. Check parameter selection and reset
Control. Contact factory if problem persists.
21
Invalid Modulation Parameter
Unacceptable R7910 control Modulation
related parameter detected.
Reset the control.
22
Safety data verification needed
Safety related parameter change has
been detected and a verification has not
been completed.
Safety related R7910 control parameter has been changed and verifi
-
cation has not been performed.
23
24VAC voltage low/high
R7910 control 24Vac control power is high
or low.
• Loose connection in 24Vac VAC power wiring.
• Loose or miswired 24Vac harness.
• Miswired wiring harness causing power supply short to
ground.
• Defective transformer.
• Transformer frequency, voltage and VA do not meet
specifications.
Hard Lockout Codes Displayed
G. Troubleshooting problems where a Hard Lockout Code is displayed.
When a hard lockout occurs, the
boiler will shut down, the display will turn red and the “Help” button will “blink”. Select the “blinking” “Help” button to
determine the cause of the Hard Lockout. Once the condition that caused the lockout is corrected, the boiler will need to be
manually reset using the Reset button on the “Active Fault” display or located on the R7910 Control.
Alarm Output Contact
The Control includes an alarm output contact located on Control terminals J6 - 7 & 8. The alarm contact closes when the
Control goes into a manual reset Hard Lockout. The list of Hard Lockouts is shown below.
Summary of Contents for Phantom-X Series
Page 49: ...49 106309 03 4 19 VI Water Piping and Trim continued Figure 28 Near Boiler Piping Heating Only...
Page 63: ...63 106309 03 4 19 VIII Electrical continued Figure 40 Ladder Diagram...
Page 64: ...64 106309 03 4 19 VIII Electrical continued Figure 41 Wiring Connections Diagram 2...
Page 73: ...73 106309 03 4 19 IX System Start up continued Figure 47 Operating Instructions...
Page 124: ...124 106309 03 4 19 XIII Service Parts continued...
Page 130: ...130 106309 03 4 19 XIII Service Parts continued...
Page 133: ...133 106309 03 4 19 XIII Service Parts continued 10A 10B 10C 10D 10G...
Page 139: ...139 106309 03 4 19...
