Download continued - Lochinvar

Service Manual
3
Troubleshooting
(continued)
Table 3F (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Operator Interface
FAULT
DESCRIPTION
CORRECTIVE ACTION
• Vent/air intake lengths exceed the maximum
allowed lengths. Refer to Section 2 - Venting of the
Power-fin Installation and Operation Manual for
proper lengths.
Fan High
OR
Fan Speed High
(Will require a manual The actual fan RPM is 30% higher than what • Check for obstruction or blockage in the vent/air
intake pipes or at terminations.
reset once the condition is being called for.
has been corrected. Press
• Check wiring connections at the fan and at the
the RESET button on the
main control board.
SMART SYSTEM display
to reset.)
• Replace the fan.
• Replace the main control board.
Flue Open
OR
Flue Shorted
• Check the sensor and associated wiring. Repair or
The flue sensor wiring has been
replace sensor or wiring if damaged.
(For M9 Models operation disconnected, grounded, or the flue sensor
• Reinstall sensor in flue outlet.
will not be affected. For has been removed from the flue.
B9 Models the unit will
not modulate.)
• Check the sensors and their associated wiring.
Repair or replace the sensor or wiring if damaged.
Sensor Open
(Will require a manual
reset once the condition
Either the inlet water or outlet water • Measure the resistance of the sensors and compare
has been corrected. Press
temperature sensor has been disconnected.
the resistance to the tables on page 33 of this
the RESET button on the
manual.
SMART SYSTEM display
to reset.)
• Replace the sensor if necessary.
Sensor Shorted
Either the inlet water or outlet water
(Will require a manual temperature sensor has been shorted.
reset once the condition
has been corrected. Press
the RESET button on the
SMART SYSTEM display
to reset.)
• Check the sensors and their associated wiring.
Repair or replace the sensor or wiring if damaged.
• Measure the resistance of the sensors and compare
the resistance to the tables on page 33 of this
manual.
• Replace the sensor if necessary.
Louver Proving
(Lockout will reset
automatically after
5 minutes or may be reset
An optional remote proving switch is not
immediately once
making.
condition has been
corrected. Press the
RESET button on the
SMART SYSTEM display
to reset.)
Tank Open
Sensors equipped with an internal limit (such
as the Lochinvar Squire® Indirect Tank), the
limit has opened due to temperature (195°F)
or the sensor has become disconnected.
• Check function of remote devices.
• Check for loose or misplaced
proving switch is not installed.
jumper
• Check the tank temperature.
• Repair or replace the sensor wiring if damaged.
• Replace the sensor if necessary.
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