Goodman Mfg VC8 instruction manual Troubleshooting Chart, Internal

Page 39

 

 

Symptoms of Abnormal Operation (Legacy

 

 

Diagnostic/Status

 

 

 

 

 

ComfortNet™

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fault Description

 

 

Thermostat Only

 

 

Possible Causes

 

 

Corrective Actions

 

 

Notes & Cautions

 

 

 

 

& ComfortNet™ Thermostat)

 

 

LED Codes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Message

Code

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ Furnace fails to operate

 

None

ξ

No 115 power to furnace

 

INTERNAL

EE

ξ

Manual disconnect switch OFF,

ξ

Assure 115 and 24 volt power to

ξ Turn power OFF prior to

 

 

ξ Integrated control module LED display

 

 

 

 

or no 24 volt power to

 

FAULT

 

 

 

door switch open or 24 volt wire

 

furnace and integrated control

 

repair.

 

 

 

provides no signal.

 

 

 

 

integrated control

 

 

 

 

 

improperly connected or loose

 

module.

ξ

Replace integrated control

 

 

ξ ComfortNet™ thermostat “Call for

 

 

 

 

module

 

 

 

 

ξ

Blown fuse or circuit breaker

ξ

Check integrated control module

 

module fuse with 3A

 

 

 

Service” icon illuminated

 

 

 

ξ Blown fuse or circuit

 

 

 

 

ξ

Integrated control module has an

 

fuse (3A). Replace if necessary.

 

automotive fuse.

 

 

ξ ComfortNet™ thermostat scrolls “Check

 

 

 

 

breaker

 

 

 

 

 

internal fault

ξ

Check for possible shorts in 115

ξ

Read precautions in

 

 

 

Furnace” message

 

 

 

ξ

Integrated control

 

 

 

 

 

 

 

 

and 24 volt circuits. Repair as

 

“Electrostatic Discharge”

 

 

 

 

 

 

 

 

 

module has an internal

 

 

 

 

 

 

 

 

necessary.

 

section of manual.

 

 

 

 

 

 

 

 

 

fault

 

 

 

 

 

 

 

ξ

Replace bad integrated control

ξ

Replace integrated control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

module.

 

module with current

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

replacement parts.

 

 

ξ

LED display indicates OP

 

OP

ξ

Normal operation

 

None

None

ξ

Normal operation

ξ

None

ξ

Normal operation

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

Furnace fails to operate

 

E0

ξ Furnace lockout due to

 

LOCKOUT

E0

ξ

Failure to establish flame. Cause

ξ

Locate and correct gas

ξ

Turn power OFF prior to

 

 

ξ Integrated control module LED display

 

 

an excessive number of

 

 

 

 

 

may be no gas to burners, front

 

interruption.

 

repair.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

provides E0 error code.

 

 

 

 

ignition “retries” (3 total)

 

 

 

 

 

cover pressure switch stuck open,

ξ

Check front cover pressure

ξ Igniter is fragile, handle

 

 

ξ ComfortNet™ thermostat “Call for

 

 

 

 

 

 

 

 

 

 

 

bad igniter or igniter alignment,

 

switch operation (hose, wiring,

 

with care.

 

 

 

Service” icon illuminated.

 

 

 

 

 

 

 

 

 

 

 

improper orifices, or

 

contact operation). Correct if

ξ Sand flame sensor with

 

 

ξ ComfortNet™ thermostat scrolls “Check

 

 

 

 

 

 

 

 

 

 

 

coated/oxidized or improperly

 

necessary.

 

emery cloth.

 

 

 

Furnace” message.

 

 

 

 

 

 

 

 

 

 

 

connected flame sensor.

ξ

Replace or realign igniter.

ξ

See “Vent/Flue Pipe”

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

Loss of flame after establishment.

ξ

Check flame sense signal. Sand

 

section for piping details.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cause may be interrupted gas

 

sensor if coated and/or oxidized.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

supply, lazy burner flames

ξ

Check flue piping for blockage,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(improper gas pressure or

 

proper length, elbows, and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

restriction in flue and/or

 

termination.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

combustion air piping), front

ξ

Verify proper induced draft

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

cover pressure switch opening, or

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

blower performance.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

improper induced draft blower

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

performance.

 

 

 

 

 

 

39

 

ξ Furnace fails to operate.

 

E1

ξ

Low stage pressure

 

PS1

E1

ξ

Low stage pressure switch

ξ

Replace low stage pressure

ξ

Turn power OFF prior to

 

ξ

Integrated control module LED display

 

 

switch circuit is closed at

 

CLOSED

 

 

 

contacts sticking.

 

switch.

 

repair.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

provides E1 error code.

 

 

 

 

start of heating cycle.

 

 

 

 

ξ

Shorts in pressure switch circuit

ξ

Repair short in wiring.

ξ

Replace pressure switch

 

 

ξ ComfortNet™ thermostat “Call for

 

 

 

 

 

 

 

 

 

 

 

wiring.

 

 

 

 

with correct replacement

 

 

 

Service” icon illuminated.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

part.

 

 

ξ ComfortNet™ thermostat scrolls “Check

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Furnace” message.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

Induced draft blower runs continuously

 

E2

ξ

Low stage pressure

 

PS1 OPEN

E2

ξ

Pressure switch hose blocked

ξ

Inspect pressure switch hose.

ξ

Turn power OFF prior to

 

 

 

with no further furnace operation.

 

 

switch circuit is not

 

 

 

 

 

pinched, or connected improperly.

 

Repair/replace if necessary.

 

repair.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ Integrated control module LED display

 

 

 

 

closed.

 

 

 

 

ξ

Blocked flue and/or inlet air pipe,

ξ

Inspect flue and/or inlet air

ξ

Replace pressure switch

 

 

 

provides E2 error code.

 

 

 

 

 

 

 

 

 

 

 

blocked drain system or weak

 

piping for blockage, proper

 

with correct replacement

 

 

ξ ComfortNet™ thermostat “Call for

 

 

 

 

 

 

 

 

 

 

 

induced draft blower.

 

length, elbows, and termination.

 

part.

 

 

 

Service” icon illuminated.

 

 

 

 

 

 

 

 

 

 

ξ

Incorrect pressure switch set point

ξ

Check drain system. Correct as

ξ

Replace induced draft

 

 

ξ ComfortNet™ thermostat scrolls “Check

 

 

 

 

 

 

 

 

 

 

 

or malfunctioning switch

 

necessary.

 

blower with correct

 

 

 

Furnace” message.

 

 

 

 

 

 

 

 

 

 

 

contacts.

ξ

Check induced draft blower

 

replacement part.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ Loose or improperly connected

 

performance. Correct as

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

wiring.

 

necessary.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ Correct pressure switch set point

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

or contact motion.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

Tighten or correct wiring

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

connection.

 

 

 

TROUBLESHOOTING CHART

Image 39
Contents Installation Instructions for *D, MVC8 GAS Furnace Upright Installations Table of Contents What to do if YOU Smell GAS Safety PrecautionsKeep this literature in a safe place for future reference Product ApplicationProduct Description Location Requirements and ConsiderationsNational Fire Protection Association, Inc CSA InternationalClearances and Accessibility Combustion & Ventilation Category Following vent testing procedure is reproduced fromCategory I Venting Vertical Venting Exterior Masonry Chimneys Category I Furnaces onlyExteriormasonrychimneyscategoryifurnacesonly Proper Chimney Termination? Check Check 3 Chimney Crown Condition Electrical Connections High Voltage Important Note Single Stage Heating with Single Stage Cooling Thermostat Wiring DiagramsGAS Supply and Piping Accessories WiringGas Altitude Kit Orifice Manifold Pressure Circulating AIR and FiltersGeneral Furnace Layout Propane Gas Installation Typ Checking Static Pressure 80% Furnace Shown, 90% Similar START-UP Procedure and AdjustmentUpright Installations Honeywell Model VR9205 Two-Stage White-Rodgers Model 36G54 Two-StageHoneywell Model VR9205 Connected to Manometer White-Rodgers Model 36G54 Connected to ManometerMeasuring Inlet Gas Pressure Alt. Method Example Temperature Rise MeasurementSwitch Bank S4 Heat Off Delay Dipswitches Switch Bank S4Comfortnet System Comfortnet SystemCTK01AA System Wiring using Four-WiresTo step to the next item Configuration Cool Airflow CL CFM Normal Sequence of Operation Operational Checks & Safety Circuit DescriptionOperational Checks Troubleshooting & Maintenance Safety Circuit DescriptionTroubleshooting Miscellaneous MaintenanceRepair and Replacement Parts Before Leaving AN InstallationInternal Troubleshooting ChartLimit Message ChartInvalid Trips Status Codes AIR Flow Data DIP SwitchesRD WH MVC8AA Wiring DiagramMVC8AB, *DVC8AA Wiring Diagram

VC8 specifications

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