Install Instructions

12 Troubleshooting (continued)
Table 12E (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Water Heater Interface
Installation & Service Manual
ERROR CODE DESCRIPTION CORRECTIVE ACTION
E06
The outlet water temperature has exceeded
the setting of the automatic reset high limit.
• Adjust the set point of the auto reset limit to a higher
setting up to a maximum of 200°F. Reference Section
10 - Operating Information for adjusting procedures.
• Verify that the system is full of water and that all air
has been properly purged from the system.
• Verify that the boiler is piped properly into the heating
system. Refer to Section 5 - System Piping
for the proper piping methods for the Shield water
heater.
• Check 120 vac to boiler pump motor on a call for
heat. If voltage is not present, check wiring back to
the main control board.
• Replace the main control board if necessary.
• If 120 vac is present on a call for heat and the
pump is not operating, replace the pump.
• If operating on something other than an outlet sensor,
check temperature setting of the main control board.
• If the optional manual reset high limit has tripped,
check setting of the device.
• Check resistance of water sensors and compare to
Table 12B on page 62 of this manual. Replace
sensor if necessary.
E07
(will require a manual
reset once the condition
has been corrected.
Press the RESET button
on the display to reset.)
Either the air pressure switch, the O-temp
heat exchanger switch, or the burner door
temperature switch has opened.
AIR PRESSURE SWITCH
• Check the wiring connections to switch. Wires should
be connected to the common and normally closed
terminals.
• Air intake lengths exceed the maximum allowed
lengths. Refer to Section 2 - General Venting
for proper lengths.
• Check for obstruction or blockage in the air
intake pipes or at terminations.
• Check reference hoses connected to the air pressure
switch for blockage or obstruction.
• Inspect the burner. Reference page 58 of this manual
for removal and cleaning procedures. Replace if
necessary.
• Inspect the heat exchanger. Reference page 58 of
this manual for removal and cleaning procedures.
• Faulty air pressure switch. Replace switch.
O-TEMP HEX SWITCH
(Applies to the 286 Model Only):
• Check the wiring connections to the fuse on the heat
exchanger.
• Check continuity across the thermal fuse. If open,
replace heat exchanger.
BURNER DOOR TEMPERATURE SWITCH
(Applies to the 286-125 -- 501-125 Models Only):
• The underlying cause of the fault must be identified
and resolved by a qualified service technician
before resetting the burner door temperature switch.
• Check continuity across two contacts. Wires should
be connected at both poles of the normally closed
switch.
• Faulty burner door temperature switch. Replace
burner door temperature switch.
65
If the burner door
temperature switch trips,
the burner door and the
burner door temperature
switch will be extremely
HOT. Allow the unit to cool
before touching. Failure to
follow this warning could
result in severe personal
injury, death, or substantial
property damage.
 WARNING