Rheem XP50T06PV42U0 Instruction Manual download pdf (Page 41)

Gas Valve LED Codes

CAUTION: Make certain power to water heater is “OFF” before removing protective cover FOR ANY REASON.

CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation.

VERIFY PROPER OPERATION AFTER SERVICING.

CAUTION: For your safety DO NOT attempt repair of gas piping, remote control, burners, vent connectors or other safety devices.

Refer repairs to qualified service personnel.

LCD CODE

For Optional

Display

GAS VALVE

LED

STATUS/PROBLEM PROBABLE CAUSE SOLUTION

None

Short ash once

every four seconds

IDLE (no call for heat,

no fault conditions)

Temperature setpoint achieved and

burner is off

No solution required

None

“Heartbeat”, alter-

nates bright/dim

Call For Heat (no fault

conditions)

Water temperature is below setpoint and

burner is on

No solution required

One Flash, three

second pause

Low ame signal

(control continues to

operate)

Pilot tube restriction, carbon buildup

on electrode, pilot wire damage or gas

supply

1. Gas supply pressure is low

2. Low voltage supply

3. Pilot replacement

Two Flash, three

second pause.

Pressure switch failed

closed

Pressure switch tube blockage or faulty

pressure switch.

1. Pressure switch wiring incorrect

2. Replace pressure switch

3. Replace tube or clear blockage.

Three Flash, three

second pause

Pressure switch failed

open.

Vent blockage or improper installation,

switch tube blockage, faulty switch,

blower improper operation or tempera-

ture switch open

1. Pressure switch wiring incorrect

2. Replace pressure switch

3. Air intake or exhaust obstructed

4. Replace blower temperature switch

5. Replace blower

Four Flash, three

second pause

TCO limit lockout

Thermal well fault, gas control fault or

tank is not lled with water

1. Reset valve and check for proper

valve cycling

2. Make sure tank is full of water

Five Flash, three

second pause

Flame out of sequence

Pilot or burner valve has failed open 1. Replace gas valve control

Six-One Flash,

three second pause

Failed trial for ignition

Insufcient gas supply, unstable pilot,

carbon buildup on electrode or wire/pilot

tube damage

1. Check gas supply

2. Replace pilot

Six-Two Flash,

three second pause

Recycle limit - PS/limit

opened

Vent blockage or improper installation,

switch tube blockage, faulty switch,

blower improper operation, blower tem-

perature switch open or excessive wind

at vent termination

1. Pressure switch wiring incorrect

2. Replace pressure switch

3. Air intake or exhaust obstructed

4. Replace blower temperature switch

5. Replace blower

6. Check for vent termination compli-

ance as stated in this manual

Six-Three Flash,

three second pause

Recycle limit - ame

lost

Pilot tube restriction, low gas supply

pressure, carbon buildup on electrode,

wire/pilot tube damage or combustion air

port blockage

1. Gas supply pressure is low

2. Jacket air holes obstructed

3. Pilot replacement

Six-Four Flash,

three second pause

Soft Lockout - ame

out of sequence sensed

Valve stuck in open position 1. Replace gas valve control

Six - Five Flash,

three second pause

Failed Ignition Lockout

Insufcient gas supply , pilot damage or

gas valve damage

1. Check gas supply

2. Replace pilot

3. Replace gas valve

Seven Flash, three

second pause

Flammable vapor sen-

sor lockout

Gasoline or other ammable gas was

detected near the appliance or the sensor

has failed

1. Verify no gasoline or ammable

vapors are present

2. Reset control using ON/OFF switch

on the gas control valve

3. Replace the ammable vapor sensor

Eight-One Flash,

three second pause

FVS fault detected

Flammable vapor sensor resistance is out

of range, wiring to FV sensor is faulty or

control is faulty

1. Replace FV sensor

2. Replace FV sensor wiring

3. Replace gas control valve

Eight-Two Flash,

three second pause

Temperature sensor

fault detected

Thermal well fault

1. Check thermal well wiring con-

nection

2. Replace thermal well

Eight-Three Flash,

three second pause

Electronics fault de-

tected

Thermal well fault or gas control fault

1. Replace gas control valve

2. Replace thermal well

Eight-Four Flash,

three second pause

Valve fault detected

Gas control valve needs to be reset or has

been damaged

1. Cycle power to gas control valve

2. Replace gas control valve

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Rheem XP50T06PV42U0 Instruction Manual Page 41

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