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Faults are investigated by selecting the “Help”
button from the “Home” screen. When a fault
is active the “Help” button flashes and the
home screen turns a red color. Continue to
select flashing buttons to be directed to the
Fault cause.
B. Display Faults:
Indication
Condition
Possible Cause
Display Completely Dark
Fan off, LWCO lights off, no green power
light on Control
No 120Vac Power
at Boiler
Check breaker and wiring between breaker panel and boiler.
- Blown high voltage fuse, Replacement Fuse Kit, part number 105349-01.
Display Completely Dark, Fan running
No 24Vac
Power to Control
- Loose 120Vac connection wiring between boiler J-Box and transformer
- Loose 24 Vac connection wiring between transformer and Control.
Blinking Green power light on Control
Control
Fault
- The green light is connected to internal power supply. The power supply
is repeatedly starting and stopping (not normal) making the light flash. The
microprocessors are not running.
- Try disconnecting all terminals except 24VAC to power the Control. The
green light should be steady. If it is not, then the control is defective. If steady,
start plugging in all the connectors while watching the green light.
When faulty wiring reconnected, green light will begin to flash.
Display Completely Dark but Boiler fires No 5 Vdc
Power to Display
- Loose 5 Vdc connection wiring between display and Control
- Defective Display or Control.
Display lost
Communication
with Control
- Loose or defective display harness
- Defective Display
- Defective Control
ER0011
Adjustment
Mode Password
Timeout
- The Control and Display are
NOT
defective. The password has timed out.
Simply cycle power to the Display to restore operation.
ER0012
Control Failed
- Defective Control.
Figure 15.1: Help Menu
XV. Troubleshooting
(continued)
Summary of Contents for K2WTC-135
Page 81: ...81 107774 02 4 18 X Domestic Hot Water Piping continued Figure 10 1 Domestic Hot Water Piping...
Page 89: ...89 107774 02 4 18 XI Wiring continued...
Page 90: ...90 107774 02 4 18 Figure 11 8 Internal Wiring Connections Diagram XI Wiring continued...
Page 101: ...101 107774 02 4 18 Lighting and Operating Instructions XII Start Up and Checkout continued...
Page 142: ...142 107774 02 4 18 XVI Repair Parts continued...
Page 145: ...145 107774 02 4 18 XVI Repair Parts continued...
Page 148: ...148 107774 02 4 18 XVI Repair Parts continued...
Page 150: ...150 107774 02 4 18 XVI Repair Parts continued...
Page 152: ...152 107774 02 4 18 XVI Repair Parts continued 120 121 122 123 124 125 126 127...
Page 159: ...159 107774 02 4 18 SERVICE RECORD DATE SERVICE PERFORMED...