Wiring Diagram; Troubleshooting; Status Codes - Carrier 58MCB Service And Maintenance Instruction

BLOWER OFF-DELAY
J2 JUMPER
24-V THERMOSTAT
TERMINALS
3-AMP FUSE
LED OPERATION &
DIAGNOSTIC LIGHT
115-VAC(L2)NEUTRAL
CONNECTIONS
COOL
HEAT
SPARE-1
BLOWER SPEED
SELECTION TERMINALS
32°F MINIMUM INSTALLED
AMBIENT OR FREEZE
PROTECTION REQUIRED
Fig. 17—Winterizing the Furnace
TWINNING AND/OR
COMPONENT TEST
TERMINAL
BLOWER OFF-DELAY
TEST/TWIN
HUM
0.5 AMP@24VAC
FUSE 3-AMP
SEC-2 SEC-1
EAC-2 L2
1-AMP@
SPARE-1 SPARE-2
EAC-1
115VAC
SPARE-2
VOLTAGE CONNECTION
EAC-1 TERMINAL
(115-VAC 1.0 AMP MAX.)
Fig. 16—Control Center
A93058
PR-1
PL2 1
115 VAC (L1) LINE
See Fig. 21 for Wiring Diagram.

TROUBLESHOOTING

Use the Troubleshooting Guide, the status code LED on the
cotntrol and the Component Test to isolate furnace operation
problems.

STATUS CODES

For an explanation of status codes, refer to service label located on
back of main furnace door or Fig. 20.
NOTE: Removing the blower access door will open the blower
access door switch and terminate 115-v power to the control. This
will erase all stored status codes.
To read current status code, remove main furnace door. The status
code LED can be viewed through the sight glass in the blower
access door.
NOTE: NO thermostat signals should be present at control and all
blower off delays must be completed to view previous codes.
11
HUMIDIFIER TERMINAL
(24-VAC 0.5 AMP MAX.)
TRANSFORMER 24-VAC
CONNECTIONS
PL1-LOW VOLTAGE MAIN
HARNESS CONNECTOR
PL2-HOT SURFACE
IGNITER & INDUCER
MOTOR CONNECTOR

WIRING DIAGRAM

A02100