Symptoms of Abnormal Operation

 

 

Diagnostic/Status

 

 

 

 

 

ComfortNet™

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fault Description

 

 

Thermostat Only

 

 

 

Possible Causes

 

 

Corrective Actions

 

 

Notes & Cautions

 

 

 

(Legacy & ComfortNet™ Thermostat)

 

 

LED Codes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Message

Code

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ Operation different than expected or no

 

d4

ξ

Invalid memory card

 

INVALID

d4

 

ξ

Shared data set on memory card

ξ

Verify shared data set is correct

ξ

Turn power OFF prior to

 

 

operation.

 

 

 

 

data.

 

MC DATA

 

 

 

 

has been rejected by integrated

 

for the specific model. Re-

 

repair

 

ξ Integrated control module LED display

 

 

 

 

 

 

 

 

 

 

 

 

control module

 

populate data using correct

ξ

Use memory card for the

 

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

memory card if required.

 

specific model.

 

 

provides d error code.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Insert memory card

 

ξ ComfortNet™ thermostat “Call for

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

 

 

Service” icon illuminated.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BEFORE turning power

 

ξ ComfortNet™ thermostat scrolls “Check

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ON. Memory card may be

 

 

Furnace” message.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

removed after data is

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

loaded.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

Turn power OFF before

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

removing memory card.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

Error code will be cleared

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

once data is loaded.

 

ξ Furnace fails to operate.

 

b0

ξ

Circulator blower motor

 

MOTOR

b0

 

ξ

Loose wiring connection at

ξ

Tighten or correct wiring

ξ

Turn power OFF prior to

 

ξ Integrated control module LED display

 

 

 

 

is not running when it

 

NOT RUN

 

 

 

 

circulator motor power leads or

 

connection.

 

repair

 

0

 

 

 

 

 

should be running.

 

 

 

 

 

 

circulator motor power leads

ξ

Verify continuous circuit

ξ

Replace inductor with

 

 

provides b error code.

 

 

 

 

 

 

 

 

 

 

 

 

disconnected.

 

through inductor. Replace if

 

correct replacement part.

 

ξ ComfortNet™ thermostat “Call for

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Service” icon illuminated.

 

 

 

 

 

 

 

 

 

 

 

ξ Open circuit in inductor or loose

 

open or short circuit.

ξ

Replace circulator motor

 

ξ ComfortNet™ thermostat scrolls “Check

 

 

 

 

 

 

 

 

 

 

 

 

wiring connection at inductor (3/4

ξ

Check circulator blower motor.

 

with correct replacement

 

 

Furnace” message.

 

 

 

 

 

 

 

 

 

 

 

 

Hp and 1 Hp models only).

 

Replace if necessary.

 

part.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ Failed circulator blower motor.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ Furnace fails to operate.

 

b1

ξ

Integrated control

 

MOTOR

b1

 

ξ

Loose wiring connection at

ξ

Tighten or correct wiring

ξ

Turn power OFF prior to

 

ξ Integrated control module LED display

 

 

 

 

module has lost

 

COMM

 

 

 

 

circulator motor control leads.

 

connection.

 

repair

 

1

 

 

 

 

 

communications with

 

 

 

 

 

ξ

Failed circulator blower motor.

ξ

Check circulator blower motor.

ξ

Replace circulator motor

 

 

provides b error code.

 

 

 

 

circulator blower motor.

 

 

 

 

 

ξ Failed integrated control module.

 

Replace if necessary.

 

with correct replacement

 

ξ ComfortNet™ thermostat “Call for

 

 

 

 

 

 

 

 

 

 

 

 

 

Service” icon illuminated.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

Check integrated control module.

 

part.

 

ξ ComfortNet™ thermostat scrolls “Check

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace if necessary.

ξ

Replace integrated control

 

 

Furnace” message.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

module with correct

42

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

replacement part.

ξ Furnace fails to operate.

 

b2

ξ

Circulator blower motor

 

MOTOR

b2

 

ξ

Incorrect circulator blower motor

ξ

Verify circulator blower motor

ξ

Turn power OFF prior to

 

ξ Integrated control module LED display

 

 

horse power in shared

 

MISMATCH

 

 

 

 

in furnace.

 

horse power is the same

 

repair

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

data set does not match

 

 

 

 

 

ξ

Incorrect shared data set in

 

specified for the specific furnace

ξ

Replace motor with correct

 

 

provides b error code.

 

 

 

 

circulator blower motor

 

 

 

 

 

 

integrated control module.

 

model. Replace if necessary.

 

replacement part.

 

ξ ComfortNet™ thermostat “Call for

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Service” icon illuminated.

 

 

 

 

horse power.

 

 

 

 

 

 

 

 

ξ

Verify shared data set is correct

ξ

Use memory card for the

 

ξ ComfortNet™ thermostat scrolls “Check

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

for the specific model. Re-

 

specific model

 

 

Furnace” message.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

populate data using correct

ξ

Insert memory card

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

memory card if required.

 

BEFORE turning power

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ON. Memory card may be

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

removed after data is

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

loaded.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

Turn power OFF before

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

removing memory card.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

Error code will be cleared

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

once shared data and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

motor horse power match.

 

ξ Furnace operates at reduced performance.

 

b3

ξ

Circulator blower motor

 

MOTOR

b3

 

ξ

Blocked filters.

ξ

Check filters for blockage.

ξ

Turn power OFF prior to

 

ξ Airflow delivered is less than expected.

 

 

 

 

is operating in a power,

 

LIMITS

 

 

 

ξ

Restrictive ductwork.

 

Clean filters or remove

 

repair.

 

ξ Integrated control module LED display

 

 

 

 

temperature, or speed

 

 

 

 

 

ξ

Undersized ductwork.

 

obstruction.

 

 

 

 

 

provides b3 error code.

 

 

 

 

limiting condition.

 

 

 

 

 

ξ

High ambient temperatures.

ξ

Check ductwork for blockage.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Remove obstruction. Verify all

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

registers are fully open.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

Verify ductwork is appropriately

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

sized for system. Resize/replace

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ductwork if necessary.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

See "Product Description" and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

"Location Requirements &

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Considerations" for furnace

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

installation requirements.

 

 

 

TROUBLESHOOTING CHART

Page 42
Image 42
Goodman Mfg VC8 instruction manual Invalid

VC8 specifications

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