Noisy, No Pump, Relief Valve, Opening | Lochinvar 150

Service Manual

3Troubleshooting

Table 3D Troubleshooting Chart - Noisy System

FAULT

CAUSE

CORRECTIVE ACTION

- Supply gas problem. Natural gas pressures

should be

between

inches

w.c.

and

• Refer to Section 7 - Gas Connections

of the Armor

inches

w.c.

gas

pressures should

Water Heater Installation and Operation Manual for

between

inches

w.c.

and

detailed information concerning the gas supply.

14 inches w.c.

• Refer to the Gas Valve Adjustment Procedure on

pages 33-34 of this manual for the proper gas valve

- Gas/air mixture problem.

setting.

Verify that the vent/air intake lengths

not

exceed the maximum listed in the General Venting

Noisy

section of the Armor Water Heater Installation and

Operation Manual.

Operation

• Refer to page 19 in this manual for the burner removal

- Dirty/damaged burner.

and inspection procedure.

Clean or replace the burner

as necessary.

• Refer to Section 6 - System Piping of the Armor Water

- Low water flow through the heat exchanger.

Heater Installation and Operation Manual for minimum

flow rates.

- Air in the piping system.

• Properly purge all air from the piping system.

- Low system water pressure.

• Verify system pressure is a minimum of 12 PSI.

- Blown fuse.

• Replace fuse F5 on the control board, see page 21 of

this manual.

No Pump

- Faulty pump.

• Replace pump.

Operation

- Faulty pump relay.

• Replace pump relay.

- Internal fault on control board.

• Replace main control board.

Relief Valve

- System pressure exceeds relief valve

• Lower the system pressure below the 150 PSI rating of

Opening

setting.

the supplied relief valve.

• Check the wiring connections to switch. Wires should

be connected to the common and normally closed

terminals.

• Air intake lengths exceed the maximum allowed

APS

lengths. Refer to Section 3 - General Venting of the

Armor Water Heater Installation and Operation Manual

Open

for proper lengths.

(will require a

• Check

for

obstruction

or blockage

the

air

manual reset once the

intake pipes or at terminations.

condition has been

Air pressure switch contacts are open.

• Check reference hoses connected to the air pressure

corrected. Press the

switch for blockage or obstruction.

RESET button on the

• Inspect the burner. Reference page 19 of this manual

SMART SYSTEM

for removal

and cleaning procedures.

Replace if

display to reset.)

necessary.

• Inspect the heat exchanger. Reference page 20 of this

manual for removal and cleaning procedures. Replace

if necessary.

• Faulty air pressure switch. Replace switch.