Service Manual

3 Troubleshooting (continued)

Table 3F (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Boiler Interface

FAULT

DESCRIPTION

CORRECTIVE ACTION

 

 

 

• Vent/air intake lengths exceed the maximum allowed

 

 

lengths. Refer to Section 2 - General Venting of the

Blower RPM’s

 

SYNC Installation and Operation Manual for

 

proper lengths.

 

Too High

 

• Check for obstruction or blockage in the vent/air

(will require a manual

The actual fan rpm is 30% higher than what

reset once the condition

is being called for.

intake pipes or at terminations.

 

has been corrected. Press

 

• Check the wiring connections at the fan and at the

the RESET button on the

 

display to reset.)

 

main control board.

 

 

 

• Replace the fan.

 

 

 

• Replace the main control board.

 

 

 

 

Sensor Open

 

• Check the sensors and their associated wiring.

(will require a manual

 

Repair or replace the sensor or wiring if damaged.

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 45

of this

the RESET button on the

 

manual.

 

display to reset.)

 

 

 

• Replace the sensor if necessary.

 

 

 

 

 

 

 

 

Sensor Shorted

 

• Check the sensors and their associated

wiring.

 

Repair or replace the sensor or wiring if damaged.

(will require a manual

 

Either the inlet water or outlet water

• Measure the resistance of the sensors and compare

reset once the condition

has been corrected. Press

temperature sensor has been shorted.

the resistance to the tables on page 45 of this

the RESET button on the

 

manual.

 

display to reset.)

 

• Replace the sensor if necessary.

 

 

 

 

 

 

 

Flue Sensor

 

• Check the sensor and its associated wiring. Repair

 

or replace the sensor or wiring if damaged.

 

Open / Removed

 

• Measure the resistance of the sensors and compare

(will require a manual

 

The flue sensor has been disconnected or

the resistance to the tables on page 45 of this

reset once the condition

has been corrected. Press

removed from the flue.

manual.

 

the RESET button on the

 

• Replace the sensor in flue.

 

display to reset.)

 

 

 

• Replace the sensor if necessary.

 

 

 

 

 

 

 

 

Flue Sensor

 

• Check the sensor and its associated wiring.

Repair

Shorted

 

or replace the sensor or wiring if damaged.

 

(will require a manual

 

• Measure the resistance of the sensors and compare

reset once the condition

The flue sensor has been shorted.

the resistance to the tables on page 45 of this

has been corrected. Press

the RESET button on the

 

manual.

 

display to reset.)

 

• Replace the sensor if necessary.

 

 

 

 

 

Louver Proving

 

 

 

Switch

 

• Check function of remote devices.

 

(will require a manual

 

 

An optional remote proving switch is not

• Check for loose or misplaced jumper if proving switch

reset once the condition

has been corrected. Press

making.

is not installed.

 

the RESET button on the

 

 

 

display to reset.)

 

 

 

 

 

 

 

 

Sensors equipped with an internal limit (such

• Check the tank temperature.

 

Tank Open

as the Lochinvar Squire® Indirect Tank), the

• Repair or replace the sensor wiring if damaged.

 

limit has opened due to temperature (195°F)

• Replace the sensor if necessary.

 

 

or the sensor has become disconnected.

 

 

 

 

 

51

Page 50 Page 52
Page 51
Image 51
Lochinvar 1 Too High, Sensor Open, Sensor Shorted, Flue Sensor, Open / Removed, Louver Proving Switch, Tank Open
Page 50 Page 52

1 specifications

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