Goodman Mfg VC8 instruction manual Limit

Page 40

 

 

 

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

Circulator blower runs continuously. No

 

E3

ξ

Primary limit or

 

HIGH

E3

ξ

Insufficient conditioned air over

ξ

Check filters and ductwork for

ξ

Turn power OFF prior to

 

 

 

furnace operation.

 

 

auxiliary limit circuit is

 

LIMIT

 

 

 

the heat exchanger. Blocked

 

blockage. Clean filters or

 

repair.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ Integrated control module LED display

 

 

 

 

open.

 

OPEN

 

 

 

filters, restrictive ductwork,

 

remove obstruction.

ξ

See Specification Sheet

 

 

 

provides E3 error code.

 

 

 

ξ Rollout limit circuit is

 

 

 

 

 

improper circulator blower speed,

ξ

Check circulator blower speed

 

applicable to your model

 

 

ξ ComfortNet™ thermostat “Call for

 

 

 

 

open.

 

 

 

 

 

or failed circulator blower motor.

 

and performance. Correct speed

 

for allowable rise range

 

 

 

Service” icon illuminated.

 

 

 

 

 

 

 

 

 

 

ξ

Flame rollout.

 

or replace blower motor if

 

and proper circulator

 

 

ξ ComfortNet™ thermostat scrolls “Check

 

 

 

 

 

 

 

 

 

 

ξ Misaligned burners, blocked flue

 

necessary.

 

speed.

 

 

 

Furnace” message.

 

 

 

 

 

 

 

 

 

 

 

and/or air inlet pipe, or failed

ξ

Check burners for proper

ξ

See "Vent/Flue Pipe"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

induced draft blower.

 

alignment.

 

section for piping details.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

Loose or improperly connected

ξ

Check flue and air inlet piping

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

wiring.

 

for blockage, proper length,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

elbows, and termination. Correct

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

as necessary.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

Check induced draft blower for

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

proper performance. Replace if

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

necessary.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

Tighten or correct wiring

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

connection.

 

 

 

 

 

ξ

Induced draft blower and circulator blower

 

E4

ξ Flame sensed with no

 

IMPROPER

E4

ξ

Short to ground in flame sense

ξ

Correct short at flame sensor or

ξ

Turn power OFF prior to

 

 

 

runs continuously. No furnace operation.

 

 

call for heat.

 

FLAME

 

 

 

circuit.

 

in flame sensor wiring.

 

repair.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ Integrated control module LED display

 

 

 

 

 

 

 

 

 

 

ξ

Lingering burner flame.

ξ

Check for lingering flame.

 

 

 

 

 

 

provides E4 error code.

 

 

 

 

 

 

 

 

 

 

ξ

Slow closing gas valve.

ξ

Verify proper operation of gas

 

 

 

 

 

ξ ComfortNet™ thermostat “Call for

 

 

 

 

 

 

 

 

 

 

 

 

 

 

valve.

 

 

 

 

 

 

Service” icon illuminated.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ ComfortNet™ thermostat scrolls “Check

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Furnace” message.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

No furnace operation.

 

E5

ξ

Open Fuse

 

Not

Not

ξ

Short in low voltage wiring

ξ

Locate and correct short in low

ξ

Turn power OFF prior to

 

 

ξ Integrated control module LED display

 

 

 

 

 

Displayed

Displayed

 

 

 

 

voltage wiring

 

repair.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

40

 

 

provides E5 error code.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ Replace fuse with 3-amp

 

ξ

ComfortNet™ thermostat displays

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

automotive type

 

 

 

“Battery Power”.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

Normal furnace operation.

 

E6

ξ Flame sense micro amp

 

WEAK

E6

ξ

Flame sensor is coated/oxidized.

ξ

Sand flame sensor if

ξ

Turn power OFF prior to

 

 

ξ Integrated control module LED display

 

 

signal is low

 

FLAME

 

 

ξ

Flame sensor incorrectly

 

coated/oxidized.

 

repair.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

provides E6 error code.

 

 

 

 

 

 

 

 

 

 

 

positioned in burner flame.

ξ

Inspect for proper sensor

ξ Sand flame sensor with

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ Lazy burner flame due to

 

alignment.

 

emery cloth.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

improper gas pressure or

ξ

Check inlet air piping for

ξ

See "Vent/Flue Pipe"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

combustion air.

 

blockage, proper length, elbows,

 

section for piping details.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

and termination.

ξ See rating plate for proper

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

Compare current gas pressure to

 

gas pressure.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

rating plate. Adjust as needed.

 

 

 

 

 

ξ Furnace fails to operate.

 

E7

ξ

Problem with igniter

 

IGNITER

E7

ξ

Improperly connected igniter.

ξ

Check and correct wiring from

ξ

Turn power OFF prior to

 

 

ξ Integrated control module LED display

 

 

circuit.

 

FAULT

 

 

ξ

Shorted igniter.

 

integrated control module to

 

repair.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

provides E7 error code.

 

 

 

 

 

 

 

 

 

 

ξ

Poor unit ground.

 

igniter.

ξ

Replace igniter with

 

 

ξ ComfortNet™ thermostat “Call for

 

 

 

 

 

 

 

 

 

 

ξ

Igniter relay fault on integrated

ξ

Replace shorted igniter.

 

correct replacement part.

 

 

 

Service” icon illuminated.

 

 

 

 

 

 

 

 

 

 

 

control module.

ξ

Check and correct unit ground

ξ

Replace control with

 

 

ξ ComfortNet™ thermostat scrolls “Check

 

 

 

 

 

 

 

 

 

 

 

 

 

 

wiring.

 

correct replacement part.

 

 

 

Furnace” message.

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

Check igniter output from

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

control. Replace if necessary.

 

 

 

TROUBLESHOOTING CHART

Image 40
Contents Installation Instructions for *D, MVC8 GAS Furnace Upright Installations Table of Contents Safety Precautions What to do if YOU Smell GASProduct Application Keep this literature in a safe place for future referenceLocation Requirements and Considerations Product DescriptionCSA International National Fire Protection Association, IncClearances and Accessibility Following vent testing procedure is reproduced from Combustion & Ventilation CategoryExterior Masonry Chimneys Category I Furnaces only Category I Venting Vertical VentingExteriormasonrychimneyscategoryifurnacesonly Proper Chimney Termination? Check Check 3 Chimney Crown Condition Electrical Connections High Voltage Important Note Thermostat Wiring Diagrams Single Stage Heating with Single Stage CoolingAccessories Wiring GAS Supply and PipingCirculating AIR and Filters Gas Altitude Kit Orifice Manifold PressureGeneral Furnace Layout Propane Gas Installation Typ START-UP Procedure and Adjustment Checking Static Pressure 80% Furnace Shown, 90% SimilarUpright Installations White-Rodgers Model 36G54 Two-Stage Honeywell Model VR9205 Connected to ManometerWhite-Rodgers Model 36G54 Connected to Manometer Honeywell Model VR9205 Two-StageMeasuring Inlet Gas Pressure Alt. Method Temperature Rise Measurement ExampleSwitch Bank S4 Switch Bank S4 Heat Off Delay DipswitchesComfortnet System Comfortnet SystemSystem Wiring using Four-Wires CTK01AATo step to the next item Configuration Cool Airflow CL CFM Operational Checks & Safety Circuit Description Normal Sequence of OperationOperational Checks Safety Circuit Description Troubleshooting & MaintenanceTroubleshooting Maintenance MiscellaneousBefore Leaving AN Installation Repair and Replacement PartsTroubleshooting Chart InternalLimit Chart MessageInvalid Trips Status Codes DIP Switches AIR Flow DataMVC8AA Wiring Diagram RD WHMVC8AB, *DVC8AA Wiring Diagram

VC8 specifications

Goodman Manufacturing has established itself as a leading provider of quality heating, ventilation, and air conditioning (HVAC) systems. Among its impressive lineup is the Goodman VC8, a versatile and efficient variable-capacity air conditioner that stands out due to its innovative design and advanced technologies.

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One of the standout features of the VC8 is its variable-speed compressor, which allows the system to adjust its output based on the cooling needs of the space. This technology enables the unit to run at lower speeds for longer periods, maintaining a consistent temperature while reducing energy usage. The variable-speed operation also contributes to quieter operation compared to traditional air conditioning systems. Homeowners can enjoy a peaceful indoor environment without the disruptive noise commonly associated with air conditioning units.

In terms of comfort, the Goodman VC8 employs advanced humidity control features, ensuring that moisture is efficiently managed within the space. This not only enhances comfort levels but also helps to prevent issues related to excessive humidity, such as mold growth and structural damage.

The VC8 is designed for reliable performance and durability, with its robust construction and dependable components. Goodman manufactures its products with high-quality materials to withstand the rigors of daily use and various weather conditions, ensuring long-lasting operation.

Additionally, the VC8 incorporates smart technology features, including compatibility with Wi-Fi-enabled thermostats. Homeowners can easily monitor and control their system remotely, providing convenience and peace of mind.

The Goodman VC8 is an exemplary solution for those looking for an energy-efficient, advanced air conditioning system. With its variable-speed compressor, excellent humidity control, durable construction, and smart features, it promises comfort and reliability suitable for any residential space. By choosing Goodman, homeowners can invest in a quality HVAC system designed to meet modern needs and preferences.