Service Manual

3 Troubleshooting

Table 3E Troubleshooting Chart - Fault Messages Displayed on Water Heater Interface

FAULT

DESCRIPTION

CORRECTIVE ACTION

 

 

 

 

 

 

• Check water heater pump operation on a call for heat.

Flow Switch/

 

• Check for closed valves or obstructions in the water

LWCO

Either the flow switch or the optional AUX

heater piping.

 

• Verify system is full of water and all air has been

(will require a manual

switch is not making.

reset once condition has

 

purged from the system.

 

been corrected. Press

 

• Check for loose or misplaced jumpers if flow switch is

the RESET button on

 

not installed.

 

the display to reset.)

 

 

 

 

Blown fuse.

• Replace fuse F2 on the control board, see page 38 of

 

this manual.

 

 

 

 

Condensate

 

• Check condensate tube from unit to floor drain for

 

proper installation and obstructions.

 

Drain Blocked

 

 

The blocked drain switch has detected

• Inspect condensate trap for blockage. Clean if

(will require a manual

reset once condition has

excessive condensate build up inside the

necessary.

 

been corrected. Press

unit.

• Check for loose wiring connection at wire harness

the RESET button on

 

plug.

 

the display to reset.)

 

• Bad blocked drain switch. Replace switch.

 

 

 

 

 

 

 

 

Flame out of

 

• Check supply voltage for proper polarity.

 

Sequence

 

• Check external wiring for voltage feedback.

 

(will require a manual

The flame detector circuit is seeing a flame

 

• Check the flame rod and make sure it is clean.

reset once the condition

signal while no flame is present.

has been corrected.

 

• Check the internal wiring for bad connections.

 

Press the RESET button

 

• Replace main control board.

 

on the display to reset.)

 

 

 

 

 

 

Gas Valve /

 

• Check wiring harness connection at the gas valve and

Connection

 

 

at the main control board.

 

(will require a manual

The main control board did not detect the

 

• Replace the gas valve wire harness.

 

reset once the condition

 

gas valve.

 

• Replace the gas valve.

 

has been corrected.

 

 

Press the RESET button

 

• Replace the main control board.

 

on the display to reset.)

 

 

 

 

 

 

 

• Inspect spark electrode and associated wiring for

 

 

damage and connection. Reference page 35 of this

 

 

manual for removal and cleaning procedures.

 

 

Replace if necessary.

 

 

 

• Check for proper electrical grounding of the unit.

 

 

• Check incoming supply gas pressure. Natural gas

Burner Did Not

 

pressures should be between 4 - 14 inches w.c.

 

(1.0 - 3.5 kPa) and LP gas pressures should be

Light

 

between 8 - 14 inches w.c. (2.0 - 3.2 kPa).

Refer

(will require a manual

The unit has failed to prove main burner

to Section 7 - Gas Connections of the Armor X2

reset once the condition

ignition. It will require a manual reset before

Installation and Operation Manual for detailed

has been corrected.

attempting to fire again.

information concerning the gas supply.

 

Press the RESET button

 

• Verify that the tube from the gas valve

to the

on the display to reset.)

 

air inlet is connected and is not damaged.

 

 

 

• Verify that the vent/air intake pipes are correctly

 

 

installed and that there are no obstructions.

 

 

 

• Check for 24 VAC to the gas valve at the 2-pin

 

 

connection on the side of the main control board

 

 

during the ignition attempt. If no voltage is present,

 

 

replace the main control board.

 

42

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Image 42
Lochinvar 1.3, 1.5 Flow Switch, Condensate, Drain Blocked, Flame out, Gas Valve, Connection, Burner Did Not, Light
Page 41 Page 43

1.5, 1.3, 1 specifications

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