Lochinvar 1 Air Flow Too, Low, Flap Valve, Stuck Open, Too Many, Resets Try Later, Voltage Too

FAULT

DESCRIPTION

CORRECTIVE ACTION

Air pressure switch contacts are open.

• Check the wiring connections to switch. Wires should

be connected to the common and normally closed

terminals.

• Vent/air intake lengths exceed the maximum allowed

lengths. Refer to Section 2 - General Venting of the

SYNC Installation and Operation Manual for

proper lengths.

• Check for obstruction or blockage in the vent/air

intake pipes or at terminations.

• Check reference hoses connected to the air pressure

Air Flow Too

switch for blockage or obstruction.

Low

• Inspect the burner. Reference page 39 of this manual

(will require a manual

for removal and cleaning procedures. Replace if

reset once the condition

necessary.

has been corrected.

• Inspect the heat exchanger. Reference page 40 of

Press the RESET button

on the display to reset.)

this manual for removal and cleaning procedures.

Replace if necessary.

• Faulty air pressure switch. Replace switch.

• Check the wiring connections to the flap valve switch.

Replace or repair wiring if necessary.

• Check for obstruction in the vent / air intake pipes or

Flap valve contacts are in an open position.

at terminations.

• Verify combustion air blower is operating. Replace if

necessary.

• Replace flap valve switch.

• Check wiring connections to the flap valve switch.

Flap Valve

Replace or repair wiring if necessary.

Flap valve contacts are in a closed position.

Stuck Open

• Check flap valve for obstruction or blockage.

• Replace flap valve switch.

Too Many

Too many manual resets have occurred

• Wait 15 minutes and try again.

• Turn power off to unit, wait 30 seconds and then turn

Resets - Try Later

during a 15 minute period.

power back on.

• Check 120 VAC supply to the transformer.

Voltage Too

• Check wiring connections at the low voltage terminal

120 VAC input to the main control board has

strip.

Low

dropped below 80 VAC.

• Check the wire size/length to remote devices.

• Replace the main control board.