33
105337-03 - 5/15
II. Troubleshooting
A. Troubleshooting problems where no error code is displayed.
Warning
Electrical Shock Hazard. Turn off power to boiler before working on wiring.
Condition
Possible Cause
Boiler not responding to call for heat, “Status” and
“Priority” show “Standby”.
Boiler is not seeing call for heat. Check thermostat or zone wiring for loose connection,
miswiring, or defective thermostat/zone control.
Boiler not responding to a call for heat, “Status”
shows “Standby” and “Priority” shows Central Heat
or Domestic Hot Water.
Boiler is not firing, temperature is greater than setpoint. Water flow through boiler primary
loop non-existent or too low.
Boiler Running but System or Boiler Circulator is
not running
• Check wiring for loose connection, miswiring.
• When there is a Domestic Hot Water Heat Request the System or Boiler pumps will be
forced “off” when there “Run Pump for” parameter is set to “Central heat, off DHW
demand” or “Central Heat, Optional Priority”. This has been set to allow all of the heat
to be provided for fast indirect water heater recovery. After one hour of “priority
protection” or the end of the Domestic Hot Water Heat Request the system and boiler
pumps will be free to run.
Home is cold during mild weather days
• Increase Low Boiler Water Temperature parameter 5°F (2.8°C) per day.
Home is cold during cold weather days
• Increase High Boiler Water Temperature parameter 5°F (2.8°C) per day
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.
- Blown low voltage fuse, Replacement Fuse Kit, part number 105349-01.
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. Replace Sage.
Figure 9: Help Menu
