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XIV. Troubleshooting
(continued)
Soft Lockout Codes Displayed
(continued)
Lockout
Number
Condition
Possible Cause
13
Flame rod
shorted to ground
• Flame rod shorted to ground
• Condensate Trap plugged or dirty.
• Shorted or mis-wired flame rode wiring.
• Defective flame rod.
• Plugged or dirty drain line in trap.
14
Differential
Temperature inlet/
outlet high
Temperature rise between supply and return
is too high.
• Inadequate boiler water flow. Verify that circulator is operating and that
circulator and piping are sized per Water Piping and Trim Section of this
manual.
15
Return temp
higher than supply
The Control is reading a return sensor
temperature higher than the supply sensor
temperature. Condition must be present for
at least 75 seconds for this error code to
appear.
• Flow through boiler reversed. Verify correct piping and circulator
orientation.
• No boiler water flow. Verify that system is purged of air and that appropriate
valves are open.
• Supply or return sensor defective.
16
Supply temp has
risen too quickly
Supply water temperature has risen too
quickly.
• See possible causes for “Hard Lockout 4”.
• Inadequate boiler water flow.
• Verify that circulator is operating and that circulator and piping are sized
per Water Piping and Trim Section of this manual.
17
Normal waiting for
blower speed to
match purge and
light-off setpoint.
Normal waiting for blower speed to match
purge and light-off setpoint.
27
Undefined Fault Undefined Fault
• Consult Factory.
28 or 53
Air Proving Switch
Failed to Close
Air Proving Switch Failed to Close
The air proving switch has failed to close;
• Check switch, check switch connection and wiring.
• Blocked vent, blocked inlet, blocked or disconnected air switch tube,
blocked heat exchanger or burner.
• Something is blocking air/flue gas flow through boiler
54
Air Proving Switch
Failed to Open
Air Proving Switch Failed to Open
The air proving switch has failed closed, check switch is operating properly.
The air proving switch is “Closed” when it should be “Open”. The air proving
switch is checked for proper function before the blower is started and the start
sequence is allowed to continue. If the air switch is closed before the blower
is started (when there is no air flow) first a soft lockout is initiated and then a
manual reset hard lockout results. The possible cause of the air proving switch
to be closed or fail to open is as follows:
• The air proving switch is jumpered.
• The air proving switch is defective.
• The blower is running before the start sequence starts the blower. This
can be caused by a loss of communication between the blower and
Control. The blower goes to high speed when there is no communication
between the Control and the blower. Possible cause of loss of
communication is a defective wiring harness, blower or Control.
Summary of Contents for K2WT-080B
Page 83: ...83 107672 01 7 17 PAGE LEFT INTENTIONALLY BLANK...
Page 89: ...89 107672 01 7 17 X Wiring continued Figure 10 5 Internal Ladder Diagram...
Page 90: ...90 107672 01 7 17 X Wiring continued...
Page 91: ...91 107672 01 7 17 Figure 10 6 Internal Wiring Connections Diagram X Wiring continued...
Page 102: ...102 107672 01 7 17 Lighting and Operating Instructions XI Start Up and Checkout continued...
Page 147: ...147 107672 01 7 17 XV Service Parts continued...
Page 151: ...151 107672 01 7 17 XV Service Parts continued...
Page 153: ...153 107672 01 7 17 XV Service Parts continued 85 86 91 95...
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