Carrier bryant 830CA User Manual Download Page 31

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830CA: Installation, Start–Up, Operating and Service and Maintenance Instructions

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

SERVICE AND MAINTENANCE

PROCEDURES

Untrained personnel can perform basic maintenance functions such as

cleaning and replacing air filters. All other operations must be performed

by trained service personnel. A qualified service person should inspect

the furnace once a year.

INTRODUCTION

GENERAL

These instructions are written as if the furnace is installed in an upflow

application. An upflow furnace application is where the blower is

located below the combustion and controls section of the furnace, and

conditioned air is discharged upward. Since this furnace can be installed

in any of the 4 positions shown in

Fig. 4

, you must revise your

orientation to component location accordingly.

ELECTRICAL CONTROLS AND WIRING

The electrical ground and polarity for 115-v wiring must be properly

maintained. Refer to

Fig. 23

for field wiring information and to

Fig. 45

for furnace wiring information.

NOTE:

If the polarity is not correct, the STATUS LED on the control

will flash rapidly and prevent the furnace from heating. The control

system also requires an earth ground for proper operation of the control

and flame-sensing electrode.
The 24-v circuit contains an automotive-type, 3-amp. fuse located on the

control, see

Fig. 25

. Any shorts of the 24-v wiring during installation,

service, or maintenance will cause this fuse to blow. If fuse replacement

is required, use ONLY a 3-amp. fuse. The control LED will display

status code 24 when fuse needs to be replaced.
Proper instrumentation is required to service electrical controls. The

control in this furnace is equipped with a Status Code LED

(Light-Emitting Diode) to aid in installation, servicing, and

troubleshooting. Status codes can be viewed at the sight glass in blower

access door. The furnace control LED is either ON continuously, rapid

flashing, or a code composed of 2 digits. The first digit is the number of

short flashes, the second digit is the number of long flashes.
For an explanation of status codes, refer to service label located on

blower access door or

Fig. 39

and the troubleshooting guide which can

be obtained from your distributor.
See

Fig. 39

, a brief Troubleshooting Guide.

For Variable Speed ECM Controls the stored status codes will NOT be

erased from the control memory, when 115- or 24-v power is interrupted.

The control will store up to the last 7 Status Codes in order of

occurrence.

1. To retrieve status codes, proceed with the following:

NOTE:

NO thermostat signal may be present at control, and all

blower-OFF delays must be completed.

a. Leave 115-v power to furnace turned on.

b. Remove outer access door.

c. Look into blower access door sight glass for current LED status.

d. Remove blower access door.

NOTE:

The Status Codes cannot be retrieved by disconnecting the limit

switch or draft safeguard switch. To retrieve Status Codes, follow the

procedure below.

2. Turn Setup Switch, SW1-1 “ON.”
3. Manually close blower access door switch.
4. Control will flash up to 7 Status Codes.
5. The last Status Code, or 8th Code, will be code 11.
6. Turn SW1-1 “OFF.”
7. The Amber LED will be continuously-lit which indicates proper

operation.

8. Release blower access door switch, install blower access door and

replace outer door or refer to the SERVICE label on the front of the

blower access door for more information.

Component Self-Test

Component Test can ONLY be initiated by performing the following:

1. Remove outer access door.
2. Remove blower access door.
3. Remove the wire from the “R” terminal of the control board.
4. Turn Setup Switch, SW-1-6 “ON.”
5. Manually close blower access door switch.

Blower access door switch opens 115-v power to control. No component

operation can occur unless switch is closed. Caution must be taken when

manually closing this switch for service purposes.

WARNING

FIRE, INJURY, OR DEATH HAZARD

Failure to follow this warning could result in personal injury, death

and/or property damage.

The ability to properly perform maintenance on this equipment requires

certain knowledge, mechanical skills, tools, and equipment. If you do

not possess these, do not attempt to perform any maintenance on this

equipment other than those procedures recommended in the User’s

Manual.